LG Electronics Telephone GDK 20W User Manual

GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
Digital Wireless Key Telephone System  
Installation Manual  
MODEL: GDK-20W  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
Table of Contents  
SECTION 1. INTRODUCTION  
.........................................................................7  
1.1 Purpose  
.....................................................................................................................................7  
1.2 Regulatory Information  
.........................................................................................................7  
1.3 Abbreviations  
...........................................................................................................................9  
SECTION 2. GENERAL DESCRIPTION  
.....................................................10  
2.1 Introduction  
.............................................................................................................................10  
2.2 System Capacity  
...................................................................................................................11  
2.3 System Specifications  
2.4 System Components  
.........................................................................................................13  
...........................................................................................................15  
SECTION 3. INSTALLATION  
.........................................................................19  
3.1 Introduction  
.............................................................................................................................19  
3.2 Site Preparation  
....................................................................................................................19  
3.3 KSU & POWER Installation  
...............................................................................................21  
.....................................................................................................................24  
.......................................................................................................................33  
3.4 PCB Installation  
3.5 System Wiring  
3.6 DECT Installation  
..................................................................................................................37  
3.6.1 Overview of the DECT system ........................................................................................37  
3.6.2 System Configuration ......................................................................................................46  
3.6.3 Hardware Installation .......................................................................................................56  
3.6.4 User subscription/desubscription ....................................................................................60  
3.6.5 Summary of the DECT Installation ..................................................................................66  
SECTION 4. ISDN DESCROPTION  
..............................................................67  
4.1 ISDN Boards in GDK-20W  
................................................................................................67  
4.2 The Basic Features of ISDN Device(S-Interface)  
.......................................................68  
4.3 The Features of ISDN CO Line(T-Interface)  
................................................................70  
SECTION 5. CAPACITIES & FEATURE CODES  
.....................................72  
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GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
5.1 System Capacities  
...............................................................................................................72  
5.2 Feature Codes  
.......................................................................................................................73  
5.2.1 Number Plan ...................................................................................................................73  
5.2.2 Basic and Extended Numbering Plans ...........................................................................75  
5.2.3 LCD Months ....................................................................................................................75  
5.2.4 Audible Signals ................................................................................................................76  
5.2.5 Frequencies and Tones ..................................................................................................77  
5.2.6 GDK-20W Configuration .................................................................................................79  
5.2.7 GDK-20W Station Configuration with LKD 2B ................................................................79  
5.2.8 Maximum Number of Stations in GDK-20W ...................................................................79  
5.2.9 Maximum Number of CO Lines in GDK-20W ...................................................................79  
5.2.10 Maximum Number of Ports(Station/CO) in GDK-20W .....................................................80  
5.2.11 Wireless Cell / Terminal Configuration .............................................................................80  
5.2.12 Gain Control......................................................................................................................80  
SECTION 6. ADMIN PROGRAMMING  
........................................................84  
6.1 General Description  
.............................................................................................................84  
6.1.1 Introduction ......................................................................................................................84  
6.1.2 To Enter the Programming Mode......................................................................................84  
6.1.3 How to Program ..............................................................................................................85  
6.1.4 Button Definition ..............................................................................................................87  
6.2 Admin Programming  
............................................................................................................88  
6.2.1 Admin Programming Index ..............................................................................................88  
6.2.2 Default Values .................................................................................................................91  
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GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
SECTION 1. INTRODUCTION  
1.1 PURPOSE  
This manual provides the information necessary to install, program, operate, and maintain the LG Digital  
Wireless Key Telephone System, GDK-20W.  
1.2 REGULATORY INFORMATION  
TELEPHONE COMPANY NOTIFICATION  
Before connecting the GDK-20W to the telephone network, you may be required to notify your local servicing telephone  
company of your intention to use "customer provided equipment". You may further be required to provide any or all of the  
following information;  
z
z
z
z
z
Number of telephone lines to be connected to the system  
Model name GDK-20W  
Local regulatory agency registration number  
Ringer equivalence  
Registered jack  
The necessary information is available from your local LGE representative.  
INCIDENCE OF HARM  
If the telephone company determines that the customer provided equipment is faulty any possibly causing  
harm or interruption in service to the telephone network, it should be disconnected until repair can be  
effected. If this is not done, the telephone company may temporarily disconnect service.  
CHANGES IN SERVICE  
The local telephone company may make changes in its communication facilities or procedures. If these changes could  
reasonably be expected to affect the use of the GDK-20W system or compatibility with the network, the telephone  
company is required to give advanced written notice to user, allowing the user to take appropriate steps to maintain  
telephone service.  
MAINTENANCE LIMITATIONS  
Maintenance on the GDK-20W Digital Wireless Key Telephone System must only be performed by the LGE or its  
authorized agent. The user may not make any changes and/or repairs except as specifically noted in this manual.  
Unauthorized alternations or repairs may affect the regulatory status of the system and may void any remaining warranty.  
NOTICE OF RADIATED EMISSIONS  
The GDK-20W Digital Wireless Key Telephone System complies with rules regarding radiation and radio frequency  
emission as defined by local regulatory agencies. In accordance with these agencies, you may be required to provide  
information such as the following to the end user.  
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GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
WARNING :  
"This equipment generates and uses R.F. energy, and if not installed and used in  
accordance with the Instruction Manual, it may cause interference to radio communications.  
It has been tested and found to comply with the appropriate limits for a telecommunication  
device. The limits are designed to provide reasonable protection against such interference,  
when operated in a commercial environment.  
Operation of this equipment in a residential area could cause interference, in which case the user, at  
his own expense, will be required to take whatever measures may be required to correct the  
interference."  
HEARING AID COMPATIBILITY  
The GDK-20W Digital Wireless Key Telephone System has been designed to comply with the Hearing Aid  
Compatibility requirements as defined in Section 68.316 of Part 68 FCC Rules.  
Pictures  
The pictures in this manual are for illustrative purposes only; your actual hardware may look slightly different.  
Interference and Attenuation  
The presence of another unsynchronized DECT system(including GDK-20W) or similar system in adjacent buildings may  
cause a strong interference and disconnection.  
A base station and a wireless terminal may interfere with sensitive laboratory equipment, medical equipment, etc.  
Interference from unsuppressed engines or electric motors may cause problems. In general, signals are attenuated to  
some low degrees when they have to pass through any barrier, however, some materials such as metal attenuate much  
degree.  
Electrostatic Sensitive Devices  
Boards which contain Electrostatic Sensitive Device(ESD) are indicated by the  
ESD handling:  
sign. The following information is  
Service personnel should ground themselves by using a wrist strap when exchanging system boards.  
When repairs are made to a system board, they should spread the floor with anti-static mat which is also grounded. Use  
a suitable, grounded soldering iron. Keep system boards and sensitive parts in the protective package until these are  
used. When returning system boards or parts like EEPROM to the factory, use the protective package as described.  
REPLACEMENT OF LITHIUM BATTERIES  
The GDK-20W Digital Wireless Key Telephone System is provided with replaceable Lithium Batteries on PMU for  
the purpose of protecting SRAM data including the system database and the real-time-clock from power loss. When  
the authorized Serviceman replaces them, it has to be carefully considered as followings,  
CAUTION :  
-. Danger of explosion if battery is incorrectly replaced.  
-. Replace only with the same or equivalent type recommended by the  
manufacturer.  
-. Dispose of used batteries according to the manufacturer’s instructions.  
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GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
1.3 ABBREVIATIONS  
For the purposes of this manual, following abbreviations are applied:  
330-SSC, 340-SSC Single-Slot Charger  
AC  
Authentication Code  
ADPCM  
BER  
CCITT  
dBm  
DECT  
ESD  
FP  
Adaptive Differential Pulse Code Modulation  
Bit Error Ratio  
International Telegraph and Telephone Consultative Committee  
dB relative to 1 milliwatt  
Digital Enhanced Cordless Telecommunications  
Electrostatic Sensitive Discharge  
Fixed Part  
GAP  
Generic Access Profile  
GDC-200B Base Station  
GDC-335H, GDC-340H Wireless Terminal  
GFSK  
IPEI  
IPUI  
KSU  
LED  
Gaussian Frequency Shift Keying  
International Portable Equipment Identity  
International Portable User Identity  
Key Service Unit  
Light Emitting Diode  
MBU  
PARK  
PCB  
PP  
Main Board Unit  
Portable Access Right Key  
Printed Circuit Board  
Portable Part  
PSTN  
RF  
Public Switched Telephone Network  
Radio Frequency  
RFPI  
TDD  
TDMA  
WTIB  
Radio Fixed Part Identity  
Time Division Duplex  
Time Division Multiple Access  
Wireless Terminal Interface Board  
Notice 1:  
If this equipment is not equipped with a standby battery supply it will not be possible to  
make calls to the emergency services when the power fails. Alternative arrangements  
should be made for access to emergency services.  
Notice 2:  
The equipment has been approved to [Commission Decision "CTR21"for pan-European single terminal  
connection to the Public Switched Telephone Network(PSTN). However, due to differences between the  
individual PSTNs provided in different countries the approval does not, of itself, give an unconditional  
assurance of successful operation on every PSTN network termination point.  
In the event of problems, you should contact your equipment supplier in the first instance."  
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GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
SECTION 2. GENERAL DESCRIPTION  
2.1 INTRODUCTION  
The GDK-20W Digital Wireless Key Telephone System is a fully digital hybrid Key Telephone System, designed to meet  
the telecommunication needs of small sized business offices & home base.  
The GDK-20W System incorporates state-of-the-art digital technology for command processing and voice switching,  
utilizing a Pulse Code Modulation/Time Division Multiplexing (PCM/TDM) distributed switching matrix. The system  
supports both "A" and "Mu" law voice encoding rule based on the requirements of local regulations and the ADPCM voice  
coding to support DECT(Digital Enhanced Cordless Telecommunications) services.  
The GDK-20W KSU(Key Service Unit) is wall mounted cabinet that house the MBU(Main Board Unit) and contain card  
slots for the CO line boards, extension boards and other useful PCBs. There are 6 slots in the system, the 1st fixed  
slot(slot1) is used to install only the DVIB/DVIBE(Digitized voice interface board) card, the 2nd,3rd fixed slots(slot2, slot3)  
are used to install one of the LCOB/LCOB2/LCOBE/LCOBA/LCOB4 or STIB/STIB2, the 4th fixed slot(slot 4) is used to  
install only the PMU(Program Module Unit) card and the 5th fixed slot(slot 5) is used to install the WTIB(Wireless terminal  
interface board) card. And the 6th fixed slot(slot6) is used to install only the MFB(Multi function board) card.  
The GDK-20W System achieves a high level of flexibility by providing support for different types of instrumentation.  
The system architecture has been designed to allow a high level of software control over the system's hardware. The  
software incorporates a vast array of features and capabilities including PC Database Administration, ISDN feature,  
Remote software downloading, etc.  
The GDK-20W System supports a combination of Digital Keysets(LKD, KD, KD/E, KD/S, KD/C series), DECT  
terminals(GDC-335H, GDC-340H), and various kinds of ISDN terminals as well as analogue single line devices. With the  
keysets, commonly used features are activated by direct button selection. Additionally, many functions may be accessed  
by dialing specific codes or optionally, by assigning these dial codes to Flexible Buttons on the keyset. In addition to key  
telephones, an array of optional terminals is available including Intercom/Door Box  
With the flexibility of the GDK-20W extensive feature content and the capability to use an array of instruments, the GDK-  
20W can be tailored to meet the short and long term needs of the most demanding customer requirements.  
* Note : The CO board(LCOB/LCOB2/LCOBE/LCOBA/LCOB4/STIB/STIB2), DVIB/DVIBE and MFB are used in common  
with GDK-16 Digital Key Telephone System.  
10  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
2.2 SYSTEM CAPACITY  
The following Table and Chart provide system capacities and display the system's configuration flexibility.  
Table 2.2.1 System Capacities  
Description  
Basic & Expansion  
Total  
Time Slots  
96  
CO Line Ports  
Max. 8 (analog CO and/or  
ISDN BRI)  
Max direct Station connections  
Max Stations via 2B modules  
Max Stations via ISDN So bus  
Max DECT terminals  
6(+4 via 2B modules)  
4
4
20  
0
DSS/DLS Consoles per station  
Attendant Positions  
1-System  
Intercom Links  
Non-blocking  
Paging  
-. All Call  
-. Internal  
1 zone  
2 zones  
20  
Station Speed Dial  
System Speed Dial  
Last Number Redial  
20/station, 24 digits each  
24 digits each  
79  
32 digits  
Music Source Inputs  
External Control Contacts  
Alarm Input  
2/PMU  
1/MBU, 1/MFB  
1/MBU  
2
2
1
1
2
4
RS-232C Ports  
1/MFB  
DTMF Receivers  
CO Line Groups  
2/PMU  
Intercom Groups  
Conference  
4
3-party  
no limit  
* Note  
1. Not all maximum capacities may be achieved simultaneously.  
2. DECT terminals can be registered and used up to 20 stations. But GDK-20W system supports the only four(4)  
simultaneous calls basically because the MBU has one wireless terminal interface circuit.  
When WTIB card is installed to SLOT5, the number of simultaneous calls is increased up to the twelve(12)(One  
base station provides the four(4) simultaneous calls.).  
The WTIB has the two(2) wireless terminal interface ports.  
3. One RS-232C port can be installed in the position of the MFB. The purpose of RS-232C port can be  
programmable in Admin station programming.  
It is recommended that the RS-232C serial cable whose length is below 10 meters is used.  
11  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
Note : This Configuration Chart is made up according to the physical capacity of system.  
2B phone  
CO  
8
STIB2+STIB2(all T-mode)  
6
4
2
0
STIB2+STIB2(So)  
ISDN  
STIB2+STIB2(all S-mode)  
STA  
6 7 8 9 10  
30 32 34  
DECT terminal  
ISDN  
terminal(So)  
Basic 4DKT  
Basic 2SLT  
(6ports in MBU)  
1) GDK-20W System Configuration Chart with STIB/STIB2(ISDN Board)  
2B phone  
CO  
8
LCOB2+LCOB2  
6
LCOB2+LCOB  
4
Analog  
Trunk  
LCOB2  
2
0
LCOB  
STA  
30  
6 7 8 9 10  
DECT terminal  
Basic 4DKT  
Basic 2SLT  
(6ports in MBU)  
2) GDK-20W System Configuration Chart with  
LCOB(or LCOBE,LCOBA)/LCOB2(or LCOB4)  
FIGURE 2.2.1 GDK-20W System Configuration Chart  
12  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
2.3 SYSTEM SPECIFICATIONS  
The following Tables provide general system specifications.  
Table 2.3.1 Dimensions & Weights  
Item  
Height  
346mm  
13.6in  
236mm  
9.3in  
45mm  
1.8in  
170mm  
6.7in  
Width  
246mm  
9.7in  
192mm  
7.6in  
140mm  
5.5in  
220mm  
8.7in  
Depth  
Weight  
90mm  
3.5in  
84mm  
3.3in  
100mm  
3.9in  
57mm  
2.2in  
3.6Kg  
Key Service Unit  
Digital Key Set  
1.5 Kg  
0.5 Kg  
420g  
Digital ICM/Door Box  
Base station  
145mm  
5.7in  
50mm  
2.0in  
35mm  
1.4in  
169g  
DECT terminal  
Table 2.3.2 Environmental Specifications  
Degrees C  
degrees F  
Item  
Operating Temperature  
Optimum Operating Temperature  
Storage Temperature  
0-50  
20-26  
0-70  
32-122  
68-78  
32-158  
Relative Humidity  
0-85% non-condensing  
Table 2.3.3 Electrical Specifications  
Power Supply :  
-. AC Voltage Input  
-. AC Power  
* Note 1.  
220~240 Volts AC @ 50~60Hz.  
60W  
-. AC Input Fuse  
T800mAH 250 V  
-. DC Output Voltages  
Back-up Battery :  
+5, -5, +30Volts(28-35V)  
-. Battery Back-up Voltage  
-. Battery Back-up Fuse  
-. Charging Current  
24 Volt DC  
T5AH 250V  
Max. 100mA  
-. Battery load Current  
Max. 1A(with Analog CO or ISDN CO)  
Ext. Relay Contacts  
Music Source Input  
STIB & STIB2 Power  
3 A @ 30 Volt DC  
600 ohm @ 0 dBm  
Max. 3W(40Volt DC, 80mA)  
* Note 1. For European Countries : This product is also designed for IT power system with Phase to Phase 230V.  
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GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
Table 2.3.4 Electrical Specifications  
Item  
22 AWG Wire  
24 AWG Wire  
Digital Keyset / Base station  
500 m (1.6K feet)  
300 m (1K feet)  
-. 2-wire loop  
2B modules(with Power Adapter,24Vdc/200mA)  
-. System – Primary Keyset  
Refer to Installation Manual of  
-. Primary Keyset – Secondary Keyset  
-. Primary Keyset – Secondary SLT  
2B modules(without Power Adapter)  
-. Primary Keyset – Secondary Keyset  
-. Primary Keyset – Secondary SLT  
Single Line Telephone  
2B-SLIU30/DTIU30  
Refer to Installation Manual of  
2B-SLIU30/DTIU30  
1,600 m (5.3K feet)  
1,000 m (3.3K feet)  
Table 2.3.5 CO Loop Specifications  
@ 20-60 Hz, 38 Vrms  
Ring Detect Sensitivity  
DTMF Dialing  
-. Frequency Deviation  
-. Signal Rise time  
-. Tone Duration, on-time  
-. Interdigit time  
less than ±1%  
3 msec, maximum  
75 msec, minimum  
75 msec, minimum  
Pulse Dialing  
-. Pulse Rate  
10 pps  
-. Break/Make Ratio  
60/40% or 66/33%  
Table 2.3.6 Miscellaneous Specifications  
Main System Memory  
Program Memory,  
(FLASH MEMORY)  
1 Mwords Max. PMU U1 : 512Kwords  
U2 : 512Kwords  
Random Access Memory, SRAM  
(Battery Backed-up)  
512Kbytes Max. PMU U3 : 256Kbytes  
U4 : 256Kbytes  
14  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
2.4 SYSTEM COMPONENTS  
Item  
Slot  
Circuit  
Description  
Remark  
Position  
Number  
GDK-20W KSU(MBU)  
4DKT + 2SLT + 1 WTI  
DVIB  
1
1
2
2
Digital Voice Interface  
Digital Voice Interface +  
DTMF Receiver 2EA  
Loop Start CO Interface  
Loop Start CO Interface  
Polarity Detect 4 ports  
DVIBE  
LCOB4  
LCOBA  
PRU4  
2,3  
2,3  
4
2
4
PRU4, PRCPTU  
PRU4, PRCPTU  
LCOB4/  
LCOBA  
LCOB4/  
LCOBA  
2,3  
PRCPTU4  
4
Polarity Detect 4 ports +  
Call Progress Tone Detect 4 ports  
Loop Start CO Interface  
LCOB  
2
2
LCOBE(SP)  
2,3  
Loop Start CO Interface  
(Call Progress Tone Detect 2 ports)  
Loop Start CO Interface  
LCOBE(w/PRU)  
2,3  
2
(Polarity Detect 2 ports)  
LCOB2  
STIB  
2,3  
2,3  
4
Loop Start CO Interface  
1(2B)  
2(4B)  
ISDN 1So/To Interface  
STIB2  
PMU  
2,3  
ISDN 1So/To + 1To Interface  
Program Module Unit  
4
WTIB  
MFB  
5
2
Wireless Terminal Interface(2 WTI)  
Battery Changing, RS-232C, Auto FAX  
Voice Memory Expansion Unit  
6
DVEU  
DVIB/  
DVIBE  
15  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
Key Service Unit (KSU)  
The KSU is a plastic cabinet designed for wall mounting. The KSU contains a MBU(Main Board Unit) and POWER  
Transformer and Mechanical parts.  
Main Board Unit (MBU)  
A Power Supply Circuit is required in the Key Service Unit. The Power Supply Circuit converts local AC power(220~240V  
AC @ 50~60Hz) to DC voltages, regulates the voltages, and provides the appropriate DC voltages to the MBU for  
distribution to other system components. Three DC outputs are provided : ±5V DC, +30V DC.  
The MBU, incorporates, master clock, one alarm detection circuit, one general purpose relay, watchdog circuitry and 4  
ports digital terminal interface circuits and 2 ports SLT circuits as well as the system's PCM voice processing and main  
micro-processor. And the MBU contains one wireless terminal interface circuit that is used to install one base station to  
support 4 simultaneous DECT calls.  
The micro-processor is a 16 bit high speed CPU that receives and transmits signaling information from/to other PCBs,  
controls feature activation, and PCM time-slot interchange. For digital voice processing, two ROM's contain PCM tone,  
gain table, etc.  
There are two commonly used slots, SLOT2 and SLOT3, and four fixed slots for extending the system capacity. From  
the left side, the SLOT1 is used to install the DVIB/DVIBE. The SLOT2 and SLOT3 are used to install  
LCOB2/LCOB/LCOBE/LCOBA/LCOB4 and STIB2 / STIB. The SLOT4 is used to install the PMU basically. The SLOT5 is  
used to install the WTIB and the SLOT6 is used to install the MFB.  
The permitted terminals are as following.  
Keyset:  
KD-36D, KD-36N, KD-24D, KD-24N  
KD/E-36EXE, KD/E-36ENH, KD/E-24EXE, KD/E-24ENH, KD/E-8BTN  
LKD-2NS, LKD-8DS, LKD-30DS, etc  
DECT terminal: GDC-330H, GDC-335H, GDC-340H  
Program Module Unit (PMU)  
The PMU is installed to SLOT4 basically and incorporates the system's memory, one internal and one external MOH  
ports, Real time clock circuit and two DTMF receivers. Each receiver is time-shared under the control of the system  
software.  
The LEDs in upper side of the PMU panel indicates system’s power on/off state and data communication state. Also, the  
PMU contains 512Kbytes of RAM and 1Mwords of Flash memory.  
The RAM associated with the system database and the real-time-clock is protected from power loss by a long life high  
energy lithium battery.  
Two(2) Flash memory(U1 & U2, 512Kwords respectively) contains the basic system operating software.  
Ring Generation Unit(RGU)  
The GDK-20W system provides two kinds of ring signals. One is 50Hz sine wave signal generated from power  
transformer, another is 25Hz square wave signal from RGU.  
The RGU is installed to connector,CN23,of MBU and generates 75Vrms ring signal that can be applied to the two(2)  
SLTs simultaneously.  
Multi Function Board (MFB)  
The Multi Function Board(MFB) Provides a RS-232C interface port with 9 pin connector. The maximum baud rate is  
38400bps. The MFB is useful for system maintenance, PC based admin, SMDR print out and local software up-grade.  
It is recommended that the RS-232C serial cable whose length is below 10 meters is used.  
The MFB includes circuitry for float charging an externally connected 24 volt battery and controls the  
operation of the battery back-up circuits. And the MFB will provide system operating voltages from the  
16  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
battery if local AC power fails. In addition, circuitry is incorporated in the MFB to disconnect the battery when  
it is in deep discharge.  
The MFB includes circuitry for Fax Tone Detection. By Admin-program, User use the MBU SLT Port 1 as  
Fax port instead of Analog CO port.  
Fax Tone Detection Circuit & Function is supported from the MFB Issue 2.  
The MFB includes one External Relay for General purpose.  
MFB can be installed on the SLOT6.  
Wireless Terminal Interface Board (WTIB)  
The WTIB provides two(2) base station interface circuits and two(2) DSP circuits.  
Base station interface circuits are used to connect base stations which interface wireless terminals(GDC-330H, GDC-  
335H, GDC-340H) based on DECT specifications.  
The DSP circuits perform 8 channels of ADPCM conversion with integral echo canceling and echo suppression.  
WTIB can be installed on the SLOT5.  
CO Line Interface Board – Loop Start (LCOB2/LCOB/LCOBE/LCOBA/LCOB4)  
There are Analog CO/PABX Line interface(Loop-start line interface) boards that is installed at the SLOT2 & SLOT3.  
These boards has 2 CO/PABX Loop Start Lines and 4CO/PABX Loop Start Lines with ring and loop current detection,  
A/D and D/A conversions, and pulse signaling.  
S/T Interface Board (STIB2)  
The S,T interface is based on the existing interface described in ETSI 300. 012 which is based upon ITU_T  
Recommendations I.430 and provides modifications and further requirements.  
This is applied at the S or T reference points for the basic interface structure defined in ITU_T I.412. Layer 1 interfacing  
requires a balanced metallic transmission medium, for each direction of transmit capability to support 192Kbps(2B+D).  
For interface circuits, one per transmission direction, are used for transmit digital signals. Data & bit clock are  
transmitted by the NT master and extracted by TE slave. The GDK-20W system can be positioned at reference point Ia  
or Ib on ETS 300. 012 that is TE-slave without power feeding or NT-master with power feeding. By selecting the short pin  
and DIP switch on each line interface, the STIB can support either S0-interface (Line card function) or T-interface (Trunk  
function).  
The board line’s specific circuitry contains PEB2086 for Physical layer and data link layer.  
This board is comprised of one T only port and one S/T Switchable port.  
STIB2 can be installed on the SLOT2 and SLOT3.  
S/T Interface Board (STIB)  
The S,T interface is based on the existing interface described in ETSI 300. 012 which is based upon ITU_T  
Recommendations I.430 and provides modifications and further requirements.  
This is applied at the S or T reference points for the basic interface structure defined in ITU_T I.412. Layer 1 interfacing  
requires a balanced metallic transmission medium, for each direction of transmit capability to support 192Kbps(2B+D).  
For interface circuits, one per transmission direction, are used for transmit digital signals. Data & bit clock are  
transmitted by the NT master and extracted by TE slave. The GDK-20W system can be positioned at reference point Ia  
or Ib on ETS 300. 012 that is TE-slave without power feeding or NT-master with power feeding. By selecting the short pin  
and DIP switch on each line interface, the STIB can support either S0-interface (Line card function) or T-interface (Trunk  
function).  
The board line’s specific circuitry contains PEB2086 for Physical layer and data link layer.  
This board is comprised of one S/T Switchable port.  
STIB can be installed on the SLOT2 and SLOT3.  
17  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
DVIB (Digitized Voice Interface Board)  
DVIB provides 2 channel Record/Play  
DVIB provides Time & System prompt  
All message are saved in Flash memory  
Max record time : Without DVEU (68 Minutes), With DVEU(136 Minutes)  
(DVIB: 68 Min, DVEU: 68Min)  
System/time stamp: 8 Min  
User record time: 128 Min  
Max. Number of User Voice Message : 400ea(With DVEU)  
(DVIB: 200ea, DVEU: 200ea)  
DVEU(Digitized Voice Expansion Unit) : Optional PCB of DVIB  
* Note: User Greeting does not lost by system power off or reset because of this message is stored in FLASH memory  
MBU SW1-1 controls the protection of recorded messages.  
DVIB should be installed on SLOT1.  
18  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
SECTION 3. INSTALLAT ION  
3.1 INTRODUCTION  
As with any sophisticated communications device, installation of the GDK-20W System requires the care and  
fore-thought of a competent technician. Installation proceeds in 4 major steps:  
-. Site Preparation  
-. KSU Installation  
-. PCB Installation  
-. System Wiring  
-. DECT Installation  
3.2 SITE PREPARATION  
General Site Considerations  
The first step is to locate an acceptable site for the common equipment.(KSU, boards, etc.)  
When locating a mounting site for the KSUs, the following points must be considered:  
1.  
2.  
3.  
4.  
5.  
The KSUs are designed for wall mounting and should not be mounted directly to a masonry or plaster board wall. It  
is recommended that a ½ inch thickness plywood back-board be firmly mounted to the wall first and then the KSU.  
The location must have access to 220~240 Volt AC, 50 - 60 Hz with a circuit breaker or fuse rated at 15 amps. A 3-  
wire parallel blade grounded outlet should be within approximately 2 meters (6 feet).  
The location must have access to a good earth ground, such as a metallic cold water pipe with no non-metallic  
joints. The ground source should be located as close as possible to the system.  
The system should be located in an area which is well ventilated with a recommended temperature of 20 - 26  
degrees C (68 - 78.8 degrees F) and a relative humidity of 5 - 85 % (non-condensing).  
The system should be located within 8 meters (25 feet) of the telephone company's termination point. Also, the  
location should be within the prescribed station loop lengths for all keysets and terminals. If existing cabling is to be  
employed, the location of existing cabling and conduits should be considered.  
6.  
The location should have adequate accessibility, space and lighting for future servicing and should consider the  
need for future expansion.  
7. The site should be away from radio transmitting equipment, arc-welding devices, copy machines, and other  
electrical equipment capable of generating electrical interference. The system should be protected from flooding  
and heavy machinery as well as excessive dust and vibration.  
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GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
Back-Board Installation  
A wooden backboard is recommended for all installations and must be installed when the location has masonry or  
plasterboard walls. A ½ inch plywood material is sufficient for most installations. The back-board should be mounted at  
a convenient height, about 1 meter above the floor, and be bolted in two number of places to distribute the weight of the  
system.  
Verify On-Site Equipment  
Once the equipment installation site has been identified and a dedicated earth ground, and lighting and ventilation are  
available, verify that all equipment required are on-site and have not been damaged during shipment. Assure there is no  
shipping damage. Note that a mounting template is packed with KSU and this template will be required later in the  
installation. Check that the type and quantity of boards received is correct and optional equipment are on-site.  
If any equipment is damaged or missing, notify appropriate personnel to correct the situation.  
20  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
3.3 KSU & POWER INSTALLATION  
GDK-20W system consists of KSU, some optional boards, and peripheral instruments. The exterior view of the GDK-20W  
is shown in Figure 3.3.1.  
Figure 3.3.1 GDK-20W Exterior View  
Mounting the KSU  
The KSU is a plastic frame cabinet designed for wall mounting. Employing the KSU mounting template provided with the  
KSU, mark the location of the two screws to mount the KSU. Again, the KSU must not be mounted on a masonry or dry-  
wall surface, in this case a wooden backboard is required, refer to paragraph [Back Board Installation]. The distance  
between mounting holes is shown in Figure 3.3.2.  
The KSU is mounted with two #10 or larger, 1.5 inch or longer screws. First, drill pilot holes in the two locations marked,  
insert the screws and tighten leaving about 0.5 inch exposed. Hang up the KSU on the screws and tighten the KSU.  
21  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
Figure 3.3.2 KSU Mounting Holes & Installation layout  
Power Installation  
The Power Supply Circuit of the MBU provides power for the system boards and telephones, converting the AC Input  
Voltage to appropriate DC voltages. Before installation, assure that the AC power cord is NOT plugged into the AC  
INLET. The Power Supply Circuit is located on the left upper side of the MBU.  
The GDK-20W Power can only operate 220~240V AC based on the connection of the cable(4-wired) by the CN22 from  
transformer and the connection of the cable(2-wired) by the CN21 to transformer.  
Input Voltage  
Connect to  
CN21  
Fuse  
230V(+10%, -15%)  
T800mAH 250V  
* Caution : the GDK-20W Power can not operate with 110~127V AC.  
22  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
KSU Grounding  
The GDK-20W mains lead must be connected to a building mains supply that includes an earth connection in  
conformance with current IEE requirements.  
Earthling is required for user safety and to minimize EMC interference.  
If does not connected mains earth, to ensure proper system operation and for safety purpose, a good earth ground is  
required. A metallic COLD water pipe usually provides a reliable ground. Carefully check that the pipe does not contain  
insulated joints that could isolate the ground path. If insulated joints exist, another earth ground source must be used or,  
if allowed, the joints may be bridged.  
A #14 AWG or larger copper wire should be used between the ground source and the connector, CN27, of the KSU. The  
wire should be kept as short as possible, it is recommended that the wire be no longer than 8 meters.(about 25 feet)  
23  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
3.4 PCB INSTALLATION  
PCB Handling & General Installation  
All boards should not be installed or removed while power applied.  
Power must be turned off prior to insertion or removal of the PCB.  
The system PCBs contain digital circuitry which can be damaged by exposure to excessive static electricity. When  
handling PCBs, a grounded wrist strap should be used to protect the boards from static discharges. Also, use common  
sense when handling the PCBs. For example, do not place a PCB in locations where heavy objects might fall on the PCB  
and damage components.  
To insert a PCB, hold the PCB and, with component side facing right, insert the card into the MBU’s din connector firmly  
and tighten. To remove a PCB, reverse the procedure. Installation method of PCB is shown in Figure 3.4.1.  
Figure 3.4.1 PCB Installation  
There are 6 slots in the GDK-20W system for extend or modify the system configuration. But, there are some restrictions  
when optional board installation. Note that the system can not operate properly with wrong installation. The SLOT1 of the  
MBU is reserved only for DVIB/DVIBE, the SLOT2 & SLOT3 is reserved for LCOBs or STIB2/STIB, the SLOT4 are  
reserved only for PMU and the SLOT5 and SLOT6 is reserved for WTIB and MFB, respectively.  
To summarize, see the following table 3.4.1.  
Slot No.  
Cards  
Remark  
Fixed slot for DVIB  
SLOT1  
SLOT2  
SLOT3  
SLOT4  
DVIB, DVIBE  
LCOB2, LCOB, LCOBE,  
LCOBA, LCOB4,STIB2, STIB  
Option board for LCO, ISDN  
PMU  
WTIB  
MFB  
Fixed slot for PMU(Basic)  
Fixed slot for WTIB  
Fixed slot for MFB  
SLOT5  
SLOT6  
[Table 3.4.1] Option Boards Installation Table  
When the system power on, the default slot assignment is automatically redefined according to board installation status.  
Main Board Unit (MBU) Installation  
The MBU is installed in the KSU default. It comprised of main processor, four(4) Digital Terminal interface circuits, two(2)  
24  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
Single Line Telephone interface circuits, six(6) card slots for optional boards, one(1) Wireless terminal interface circuit  
and data communication circuit which transmits and receives to/from other cards. The MBU is equipped with one basic  
card; a PMU for program memory, data memory, and etc. Refer to Figure 3.4.2.  
Figure 3.4.2 MBU Installation  
The MBU provides screw-down terminal blocks that is used to connect the peripheral instruments; Keyset, SLT, Base  
station, and etc. Four(4) DKTUs are connected to MBU through terminal block, CN18, and two(2) SLTs are connected to  
the SLT1 & SLT2 ports of terminal block, CN19. The connection between MBU and base station is performed through  
the WTI1 port of terminal block, CN19. All of peripheral instruments are installed by using twisted one pair copper line.  
25  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
Figure 3.4.3 RGU connector and protection switch setting  
Following table shows the connector and switch on GDK-20W MBU.  
Switch  
Description  
Remark  
Manufacturer  
ISSUE 1  
setting  
Dependent on country  
adaptation.  
Pin 1&2 short: 50Hz ring signal(sine wave)  
RGU plugged: 25Hz ring signal(square wave)  
CN23  
ON: For database protection.  
Turn ON the switch  
after system power on.  
1-1 ( OFF)  
OFF: For system default.  
SW 1  
1-2 (OFF)  
OFF : Loop back OFF  
OFF (Always)  
The MBU has a two position DIP switch(SW1). The following is the function of each switch position :  
Knob 1  
Knob 2  
System data base initialization when power on  
-. On : Do not initialize system data base when power on.  
-. Off : Initialize system data base when power on.  
ISDN Loop Back on  
-. On : Loop Back on  
-. Off : Loop Back off  
Before programming the system, SW1(knob 1) should be placed in the Off position and turn the system power off and on  
to initialize the system database to default. Once the database has been initialized, SW(knob 1) should be placed in the  
on position to protect the database in the memory. Refer to Figure 3.4.3.  
26  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
PMU Installation  
The PMU must be installed to SLOT4 on the MBU basically for the system operation. Refer to Figure 3.4.2.  
The PMU contains a lithium dry-cell to keep the memory contents and real-time clock functions during power off. The  
battery is soldered to the PMU, and connected circuitry by an on/off DIP switch(SW2). So the DIP switch knob must be  
ON position before the PMU installation.  
The PMU provides two kinds of MOH sources, internal MOH and external MOH.  
External MOH source is input through black screw-down terminal, CN5, on the PMU. Refer to Figure 3.4.4.  
And there are five red LEDs on the PMU, the function of them are as follows.  
LD1 Display system software operation  
-. This LED will turn on and turn off at every 100 msec.  
LD2 Display task changing (software testing purpose)  
-. This LED will be turn on/off toggle when call task changing.  
LD3 Display task changing (software testing purpose)  
-. This LED will be turn on/off toggle when timer task changing.  
LD4 Indication for DKT data comm. error  
-. This LED will be turn on/off toggle for keyset data comm. Error.  
LD5 Display task changing  
-. This LED will be turn on/off toggle when DECT task changing.  
Figure 3.4.4 PMU Installation  
27  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
RGU Installation  
The RGU generates 25Hz square wave ring signal.  
The RGU is installed to connector, CN23, of the MBU and generates 75Vrms ring signal that can be applied to the two(2)  
SLTs simultaneously.  
Figure 3.4.5 RGU Installation  
MFB Installation  
The RS-232C of MFB board is used for the function of system maintenance, PC based Admin, SMDR print local software  
up-grade.  
The Followings are the list of the system’s output.  
-. Administration data base  
-. Off-Line SMDR(on-demand)  
-. On-Line SMDR  
-. Statistical Information  
-. System Trace data  
The installation method is shown in Figure 3.4.6.  
Figure 3.4.6 MFB installation  
28  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
Analog CO/PABX Line Interface Boards (LCOB: Loop-start) Installation  
The LCOB2, LCOB, LCOBE, LCOBA, and LCOB4 can be installed on the SLOT2 & SLOT3  
The exterior of them are shown in Figure 3.4.7.  
This board provides two(2) Loop Start ports and four(4) Loop Start ports.  
Board  
LCOB2, LCOB4  
Slot  
Port No.  
SLOT2 & 3  
SLOT2 & 3  
4
2
LCOB, LCOBE, LCOBA  
[Table 3.4.2] LCOBs  
Figure 3.4.7 Analog CO Interface Boards  
ISDN STIB2 & STIB (S/T Interface Board) Installation  
It should be noted that the STIB2 & STIB board should be installed on the SLOT2&SLOT3 of the MBU.  
The STIB2 provides 1 port of BRI(Basic Rate Interface-‘T’ mode only) and 1port of ‘S’ and ‘T’ mode Switchable interface  
and STIB provides 1 port of ‘S’ and ‘T’ mode Switchable interface.  
Select the jumpers and DIP switches for S0 or T0 interface. Be sure to connect ISDN trunk to T0 interface port and  
ISDN extension to S0 interface port. Check if ISDN trunk is not connected to S0 interface port and ISDN extension is  
not connected to T0 interface port.  
The mode selection method is shown in table 3.4.3.  
SW2  
CN2  
SW1  
S/T Port  
1 Port STIB  
SW2  
SW1  
S/T Port  
T Port  
CN2  
SW3  
2 Port STIB  
Figure 3.4.8 Switches and connector for the STIB  
29  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
Jumper/  
Switch  
Manufacture  
Description  
Remark  
Setting (T mode)  
S0 or T0 interface mode selection for the  
port and PEB2086 device respectively.  
SW1 &  
CN2  
SW1 :OFF  
CN2 : T position  
Pin1-2: OFF  
Pin3-4 : ON  
ON  
#1 and #2 : External Power feeding ON/OFF.  
#3 and #4 : Termination Resistor ON/OFF  
Termination Resistor ON/OFF  
SW2  
Only for T0 interface.  
SW3  
(a) Selection Method  
Port  
Connector  
& Switch  
SW1  
Mode  
Selection Method  
Move short pins to CN2’s ‘T’ position  
Move SW1, SW2 to ‘T’ position(OFF)  
Move short pins to CN2’s ‘S’ position  
Move SW1, SW2 to ‘S’ position(ON)  
T
S
So/To (CO1-2 or  
2So station 130-131)  
SW2  
CN2  
To  
(CO3-4 or 1-2)  
SW3  
T only  
Move SW3 to ON position  
(b) Port meaning for STIB2 of SLOT2  
[Table 3.4.3] S/T Mode Selection Method  
Figure 3.4.9 STIB2  
It is noted that the ‘PWR’ and the ‘R’’ markings on the STIB2 & STIB card are switched with above figure.  
30  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
WTIB (Wireless Terminal Interface Board) Installation  
The WTIB provides 2 ports of base station interfaces. The connection between the WTIB and base stations(GDC-200B)  
are performed through TERMINAL BLOCK(CN1) by using twisted one pair copper line.  
The exterior of the board is shown in Figure 3.4.10.  
It should be noted that the WTIB board could be installed on the SLOT5.  
Figure 3.4.10 WTIB  
DVIB (Digitized Voice Interface Board) Installation  
The DVIB provides 2 voice channels. The maximum record time of a DVIB without DVEU(Digitized Voice Expansion Unit)  
is 68 minutes and if a DVEU is installed, additional 70 minutes is added to the maximum record time. And the protection  
of recorded messages is controlled by MBU SW1-1.  
MBU  
Description  
OFF : for system default  
ON : for database protection  
System message  
Not deleted  
Not deleted  
User message  
Deleted  
Not deleted  
SW1-1  
[Table 3.4.4] Protection of recorded messages  
The DVIB board should be installed on the SLOT1 of MBU. And the DVEU board should be installed correctly  
on the CN4 and CN5 of DVIB. If the boards are incorrectly installed, DVIB or DVEU may be operated abnormally  
or damaged.  
The connectors of a DVIB board is shown in figure 3.4.11. CN2 is used for the trace of a DVIB board using a trace data  
monitor tool(GDK-TRC1). CN4 and CN5 are used for a DVEU installation. CN1 is inserted on SLOT1 of MBU and CN3 is  
used for a test.  
31  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
CN5  
DVEU  
CN3  
CN4  
CN1  
CN2  
Figure 3.4.11 Connectors of the DVIB  
Figure 3.4.12 DVIB  
32  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
3.5 SYSTEM WIRING  
Battery Back-Up Wiring Installation  
The system can be equipped with external batteries for proper operation when local AC power fails. The Back-Up  
batteries are connected to the connector(CN3) of the MFB.  
The External batteries must provide 24 Volts DC. This is generally accomplished by connecting two 12 volts batteries in a  
series arrangement. Battery operation is controlled by the MFB. The MFB will provide charging current(maximum 0.5  
amp) to the batteries during normal AC power operation. The MFB will automatically stop the battery operation when AC  
power re-applied or low battery voltage detected.  
The system operating time by external batteries is depend on several elements as follows, battery charge state, condition  
of the batteries, capacity of the batteries, and the system configuration(number of station ports).  
The MFB has one industry standard 9 pin RS-232C connector. The RS-232C ports are connected by 9-pin connectors as  
shown Figure 3.5.2. Note that the communication settings are 9600bps(Max 38400bps), 8 bit data, no parity bit and 1  
stop bit.  
The RS-232C port only provides three(3) control signals such as TXD, RXD and ground.  
It is recommended that the RS-232C serial cable whose length is below 10 meters is used.  
Batteries are connected to the connector(CN3) of the MFB, as shown in Figure 3.5.1.  
Warning :  
-
Carefully check the battery polarity with cable colors(RED and BLUE) when connecting the battery to  
system.  
-
-
It is recommended to use a fuse(5A @250V) between battery and system.  
Recommended battery capacity is 24V/10AH MF battery. The system will operate more than 5 hours with  
this battery.  
Figure 3.5.1 Battery Back-Up Wiring  
2(TX)  
3(RX)  
2(RX)  
3(TX)  
2(TX)  
3(RX)  
3(RX)  
2(TX)  
MFB  
Terminal  
RS-232C  
Connector  
(9pin)  
MFB  
RS-232C  
Connector  
(9pin)  
Terminal  
RS-232C  
Connector  
(25pin)  
RS-232C  
Connector  
(9pin)  
5(GND) 5(GND)  
5(GND)  
7(GND)  
Figure 3.5.2 RS-232C 9-pin Connector Wiring  
33  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
But, for ISDN line connection, it is done by using the RJ45 type connector on the ISDN interface  
cards(STIB2, STIB).  
Music on Hold (MOH) Wiring  
The GDK-20W System sends internal or external music signal to CO lines that are in hold state. The default music  
source input is assigned to internal source. And the external music source can be used by changing the system database  
and connect a external music source to the blue colored TERMINAL BLOCK(CN2) of the PMU.  
General Purpose Relays Wiring  
There are two general purpose relays in the GDK-20W system. One contact is provided in the MBU and is connected  
through CN22 pin#1,2 (RELAY1) and another contact is prepared in the MFB and is connected through CN2 pin #1,  
2(RELAY2). The control of these relays are done by system programming..  
Also, this dry relay contact can be used to Loud Bell Control function, Door Open function, etc. under the software control.  
Note that the maximum rating of the relay contact is 30Volt/3A, so, do not use over this rating.  
GDK-20W  
Internal Relay  
Contact  
External DC  
Power Supply  
DC device  
e.g. Bell  
Relay contact Max. rating - 3A at 30Vdc : resistive load  
CAUTION  
-. It is possible to cause danger of high voltage and electric shock.  
-. "From external source - take all appropriate safety precaution if over 50V AC"  
34  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
Alarm Detect Port Wiring  
One external alarm detect input port is provided from the TERMINAL BLOCK CN22(pin#3,4) of the MBU. This port is  
used for notify to extensions when the external switch on/off. The connection example is shown in Figure 3.5.3.  
Close or open detection is programmable by administration programming.  
Pin #3 of CN22  
External Switch  
Pin #4 of CN22  
Figure 3.5.3 External Switch Wiring Example  
Ferrite Core Installation  
A ferrite core is provided in the package of the KSU. Ferrite core should be installed when wiring MBU, CO board, and  
WTIB.  
Ferrite core is used to proof the EMI and to protect the system from the impulse noises.  
Ferrite core should be installed on signal wires as Figure 3.5.4 Ferrite core on signal wires.  
35  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
Figure 3.5.4 Ferrite core on signal wires  
36  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
3.6 DECT Installation  
3.6.1 Overview of the DECT system  
The wireless standard of the GDK-20W system is DECT(Digital Enhanced Cordless Tele-communications).  
The components of the DECT system are a WTIB, base stations and wireless terminals. The GDK-20W system has the  
three wireless terminal interface ports that is used to connect three(3) base stations. One port is prepared in the MBU,  
the others are provided by WTIB that is installed to SLOT5 of the MBU optionally.  
Base stations are installed throughout a facility to relay calls between wireless terminals and the GDK-20W office  
telephone system. The GDC-335H and GDC-340H are wireless terminals. The wireless terminal users have access right  
to the office telephone system (GDK-20W) feature in addition to being free to make and calls away from their desks. The  
wireless terminal is small, light and easy to use. It also provides a display for alphanumeric information.  
3.6.1.1 Components of the DECT system  
The components of a DECT system are;  
GDK-20W Digital Wireless Key Telephone System  
WTIB(option) card  
Base Station (GDC-200B)  
Wireless Terminal (GDC-335H, GDC-340H)  
Charger (330-SSC, 340-SSC)  
Figure 3.6.1 shows components of the DECT system. The GDK-20W Digital Wireless Key Telephone system includes  
WTIB card.  
37  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
GDK-20W Digital KSU  
GDC-335H, GDC-340H  
(Wireless terminal)  
330-SSC, 340-SSC  
(Single-Slot Charger)  
GDC-200B  
(Base Station)  
Figure 3.6.1 Components of a DECT system  
38  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
A. GDK-20W Digital Wireless Key Telephone System  
The MBU has one(1) wireless terminal interface port that is used to connect one base station.  
B. WTIB (Wireless Terminal Interface Board)  
The WTIB has two(2) wireless terminal interface(WTI) ports and can support the two(2) base stations.  
The WTIB should be plugged into the SLOT5 of the MBU.  
C. Base Station (GDC-200B)  
The base station should be installed indoors and protected by surge because it is designed for indoor station.  
It has a RF(Radio Frequency) Module(transmitter and receiver) that handles communication with wireless terminals  
through the air link. It can be connected to a GDK-20W system via Wireless terminal interface ports.  
Each base station provides similar coverage for a particular area call as a cell, and supports four(4) simultaneous calls  
(four traffic channels). However, since individual wireless terminals are not continuously in call, the system may support  
more than four wireless terminals:  
In the GDK-20W system, Maximum 20 wireless terminals can be registered.  
Base stations may be mounted on walls or desktops up to 300 meters away from the GDK-20W system using twisted one  
pair cable (0.5φ, AWG 24). They are remotely powered (DC 30 volts) by the wireless terminal interface circuit.  
The number of base stations used in a system depends on the area to be covered and the traffic density. The typical in-  
house coverage is a 40 meter radius. In practice the cell size may vary between 10 meter indoors in worst case situation,  
up to 200 meters outdoor in free space.  
D. Wireless Terminal (GDC-335H, GDC-340H)  
It is designed for ease-to-use. The LCD shows various call-information, and the keypad has a 12-dial pad and additional  
keys that facilitate wireless terminal.  
E. Single Slot Charger (330-SSC, 340-SSC)  
The battery of a GDC-335H is charged by a 330-SSC and the battery of a GDC-340H is charged by a 340-  
SSC.  
39  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
3.6.1.2 How to make Calls  
A. Before Making Initial Call  
It is similar to other calls in a telephone system to make a call in the DECT system except that every call to or from a  
wireless terminal involves establishing a RF link to the wireless terminal through a base station. In an idle status, a  
wireless terminal scans a dummy bearer from base stations and locks to the base station with the strongest signal. The  
dummy bearer is similar to the control channel in a cellular telephone system. If the wireless terminal can not synchronize  
to a dummy bearer, it can not make a call.  
System ID(PARK) is very important in the DECT calls. The Base stations should be assigned to a unique GDK-20W  
DECT ID(PARK). Wireless terminals should be programmed with a system ID that matches a particular GDK-20W DECT  
system before communicating with a base station in the system.  
Calls to Wireless Terminal  
The DECT system receives a call from an extension of the system.  
To locate the called party, the DECT system sends a request containing the ID of the called wireless terminal to all base  
stations.  
The called wireless terminal responds to the base station onto which it is locked.  
The RF link is established. The call then proceeds like other calls in the office telephone system.  
Initiated Call from a Wireless Terminal  
The wireless terminal locks onto a base station and initiates a RF link.  
The base station transmits call information to the DECT system. The call then proceeds like other calls in the office  
telephone system.  
B. Controlling a Call  
During a call, interaction occurs mainly between the wireless terminal and a DECT. The wireless terminal accepts input at  
the keypad by user and sends the information to a DECT via base station. The DECT handles most of signaling functions  
and controls the display of wireless terminal.  
C. Terminating a Call  
Call termination involves releasing a voice channel and transiting a wireless terminal to a standby status. When DECT  
recognizes that a call has terminated, it sends a release message to a base station. The base station and wireless  
terminal are released.  
In some cases, the base station should initiate call termination by sending a message to the DECT. Loss of wireless  
terminal power and interference with the RF signal are examples of events that cause the base station to terminate a call  
abruptly.  
40  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
3.6.1.3 GDK-20W DECT  
A. WTIB  
The WTIB is installed to the SLOT5 of the MBU and has the two(2) wireless terminal interface ports.  
Figure 3.6.2 shows the layout of the WTIB.  
Figure 3.6.2 WTIB  
B. Base Station  
Figure 3.6.3 shows a base station.  
Figure 3.6.3 Base Station  
41  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
Base stations may be mounted on wall or desktop up to 300 meters away from the wireless terminal interface ports using  
a twisted one pair cable(0.5φ). The system supports max. three base stations.  
In typical office environments, each base station has a broadcast range of 50 meters and supports an area of 8,000  
square meters. In settings where the absence of any obstruction provide perfect line of sight conditions between a base  
station and wireless terminal users and there are no atmospheric limitations, the range may increase to max.200 meters.  
LEDs on the PCB of a base station provide diagnostic information for base station status.  
Antenna Diversity  
Spatial diversity at the base station is implemented by using two antennas. The antenna providing the best signal for  
each time slot is selected. This is performed on the basis of the RF power level and alternatively the quality information.  
In DECT, the BER(Bit Error Ratio) is affected by multi-path propagation not only in terms of signal fading but in terms of  
time dispersion, which leads to ISI(Inter Symbol Interference). Antenna diversity not only reduces the fading probability  
but mitigates the effect of time dispersion.  
Power Feeding  
The base station is DC powered from the WTI ports by phantom power feeding circuit between a WTI port and a base  
station.  
Roaming  
Roaming is the movement of a wireless terminal from one base station coverage area to another base station coverage  
area, where the base stations enable the wireless terminal to make or receive calls in both areas. The system supports  
roaming function.  
Hand-over  
The GDK-20W DECT provides a seamless hand-over, almost undetectable by users as they move from one radio cell to  
another.  
Digital Voice Quality  
The GDK-20W DECT uses advanced digital technology to provide high sound quality as almost equal to fixed line  
telephones. Speech coding uses 32kbps ADPCM(Adaptive Differential Pulse Code Modulation) conforming to CCITT  
recommendation G.721.  
Multiple Simultaneous Users  
The GDK-20W DECT accommodates multiple users(12 users) in simultaneous conversation with no degradation in  
performance.  
C. Wireless Terminal (GDC-335H, GDC-340H)  
The wireless terminal is designed for ease-of-use at the desks of users or moving throughout a facility.  
z
z
z
It is small and light for ease-of-use.  
The LCD displays call information and the status of terminal.  
The keypad contains specially labeled keys assisting users to make calls and operate telephone  
features.  
42  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
Figure 3.6.4 Wireless Terminal (GDC-335H, GDC-340H)  
Subscription  
The wireless terminals associate unique identities, to prevent unauthorized use of the PSTN line. See the User Guide of  
the GDC-335H and GDC-340H for the subscription of wireless terminals.  
LCD Display  
The LCD of GDC-335H has six icons and 2 x 10 Dot matrix and the LCD of GDC-340H has eight icons and 2  
x 12 Dot matrix.  
RSSI  
Station # and  
Call information  
Figure 3.6.5 The LCD of GDC-335H & GDC-340H  
Security  
The wireless terminal ciphers voice information before transmitting it. It ensures that the conversations are  
private and inaccessible to electronic eavesdropping.  
Ringing  
There are various types of ring signal in the wireless terminal and users can select the ring signal and control  
the volume of ring signal. Seven volume levels are available in GDC-335H and four volume levels are  
available in GDC-340H.  
Key Pad Tone  
A beep is heard when the wireless terminals recognize a dial input from dial pad.  
43  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
Low Battery Alarm  
When the battery is discharged to low battery state, the low battery message is displayed in the display LCD  
of the wireless terminal (except GDC-340H) and warning tone is heard (both GDC-33xH and GDC-340H).  
Low Power Consumption  
The GDC-335H supports 15 hours for continuous use and 50 hours for standby mode on fully charged  
battery and The GDC-340H supports 9 hours for continuous use and 50 hours for standby mode on fully  
charged battery.  
Removable Battery Pack  
The GDC-335H has one type of battery pack (330-SBP, 600mAh). It is standard battery pack. The 330-SBP  
supports 15 hours for continuous use and 50 hours for standby mode.  
The GDC-340H has standard rechargeable battery (1.2V rechargeable NiMH AAA size 2 cell). The battery of  
GDC-340H supports 9 hours in talking mode and 50 hours in standby mode.  
Figure 3.6.6 Battery Pack (330-SBP, AAA size battery)  
Antenna  
The antenna of the GDC-335H is an wire and non-retractable antenna. Do not extract it. If you try to pull it  
out, it may be destroyed. The antenna of the GDC-340H is embedded.  
Holes of Top and Bottom Side  
There are two holes in the top and bottom side of a GDC-335H. The GDC-340H has two holes in only  
bottom side. The holes are special purpose and are covered with covers. Do not take off these covers.  
Figure 3.6.7 shows the location of the holes.  
LED  
antenna  
Bottom View  
Top View  
Figure 3.6.7 Holes in the Top and Bottom Side  
Charger (330-SSC, 340-SSC)  
The GDC-335H comes with a charger that accommodates GDC-335H and one type of battery pack. And the  
GDC-340H comes with a charger that accommodates GDC-340H and standard rechargeable battery. The  
330-SSC & 340-SSC is supplied with the adapter (330-HAP). 330-HAP adapter is used for the charger, 330-  
SSC & 340-SSC. There are two types of adapter.  
44  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
It is dependent on country adaptation.  
Type -Ⅰ  
z
z
Input : Only AC 230V ~ 50Hz 50mA  
Output : DC12V 200mA 2.4VA  
Type -Ⅱ  
z
z
Input : Both AC 220V and 110V ~ 50/60Hz  
Output : DC12V 200mA  
Figure 3.6.8 shows the 330-SSC and 340-SSC.  
Figure 3.6.8 Single-Slot Charger (330-SSC, 340-SSC)  
LED (red) on the charger indicates that charging is in progress.  
In the GDC-335H, when a battery is almost consumed during a call or in an idle state, warning tone will be  
heard more 3 times in every 20 second with “LOW BATT.” message on the LCD, and a low-battery icon  
(
) will be twinkling at the right corner of the LCD.  
In the GDC-340H, when a battery is almost consumed during a call or in an idle state, warning tone will be  
heard once in every 5 second, and a low-battery icon ( ) will be blinking at the right corner of the LCD.  
The battery inside of GDC-33xH, GDC-340H is Nickel Metal Hydride (NI-MH) and can be charged any time.  
To increase the lifetime of the battery, use the wireless terminal without charging until the battery  
alarm is heard.  
45  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
3.6.2 System Configuration  
The GDK-20W DECT is used in single cell or multi-cell.  
3.6.2.1 Before Installation  
Followings are the factors that affect the quality of service for the GDK-20W DECT.  
Location of base station  
Number of wireless terminal users within a base station range  
Obstructions between base station and wireless terminal  
Coverage area  
Desired quality of service  
The purpose of this section is to provide you with information and explain tasks that you should complete to  
ensure the best operation of the system.  
The following procedure is very helpful to check the coverage region and install the base station:  
1. Site survey (see the sub-clause A)  
2. Judge where to place bases on plan drawing (see the sub-clause B).  
3. For each base, check coverage tool (see the sub-clause C and CRS Tool Manual).  
4. Plot limit line for each base station.  
5. Check for shadow area.  
6. Adjust base position for shadow area or add base if not possible.  
7. Consider traffic 5 calls per cell add to plan.  
8. Install the base station (see the 3.6.3 Hardware Installation).  
9. Check with 335H GAP (except 340H GAP) handset using RSSI (displays only one base station at a  
time, limit is -80 dbm: see the sub-clause D)  
10. Walk with 2 handsets, monitor for voice quality and ‘OUT OF RANGE’ message.  
11. If it is OK, finish it.  
A. Site Survey  
1. Get building blue prints.  
2. Check building material and thickness.  
Note the general construction materials used in walls and doors between multi-story buildings, and  
window coatings and coverings, if any. Also note any large metal objects, such as equipment, doors, and  
fluorescent lamp shades.  
In general, signals are attenuated to some lower degrees when they should pass through any barrier,  
however, some materials such as metal attenuate much degree.  
Note  
a. Consider high traffic areas, such as conference rooms, cafeterias, and manufacturing floors.  
b. Consider office locations and number of wireless terminal users within the site.  
46  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
B. Base Station Broadcast Range and Location  
1. Base Station Requirements  
To determine the number of base station in a system, you should consider base station broadcast range.  
2. Base Station Range  
In a typical office environment, each base station has a broadcast range of 50 meters and supports an  
area of 8,000 square meters, but a broadcast range depends entirely upon office environment. Where  
the absence of any obstruction provides perfect line of sight conditions between the base station and  
wireless terminal users and if there are no atmospheric limitations, the range may increase to 200  
meters.  
The following base station broadcast ranges can be used as a rough guide to plan the base station  
positions:  
z
z
z
In line of sight, the base station has a range of about 200m.  
In hall, the base station has a range of 40-70m.  
In buildings, the base station has a range of about 25-40m. It assumes that walls are made of light  
brick, plasterboard or wallboard with metal frames. Normal electrical wiring, central heating pipes,  
office furniture and desktop computer equipment have no significant effect.  
r = Typical office environment : up to 50 meters  
r = Line of sight : up to 200 meters  
Base Station  
Figure 3.6.9 Base Station Service Area  
The characteristic antenna field pattern is a tours(doughnut) centered on the antenna.  
Figure 3.6.10 Base Station Antenna Field Pattern (Vertical)  
3. Base Station Location on the Plan Drawing  
Determine the location of the base station on the plan drawing according to the previous information  
based on the base station broadcast range.  
47  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
Once you have completed the steps described in Site Survey on sub-clause A and determined the  
number of base stations you need, you should determine where to install the base stations for optimum  
coverage and operation of the GDK-20W DECT.  
C. CRS(Cell-Coverage Region Survey) Tool  
This section provides general guidelines and examples for determining location of base station in the site.  
For more information, see the CRS Tool Manual.  
For the easy installation, LGE prepares the portable tools which consist of the base station and the wireless  
terminal.  
Figure 3.6.11 Installation Configuration using the CRS Tool  
General Guidelines  
1.  
2.  
Place the base stations to maximize direct line of sight between wireless terminals and base station  
antennas. Mounting base stations as high as possible will satisfy this guideline.  
Place the base stations to minimize obstructions near antennas. If you mount a base station on a wall,  
place it higher than the average tall person and do not mount it near doors that could temporarily  
obstruct antennas when the door is opened.  
3.  
4.  
5.  
Antennas on wall-mounted base stations should be parallel to the wall.  
Centralize base stations within the area that you intend to cover.  
When rule 1 cannot be observed, place base stations so that signals begin their paths with a clear line  
of sight and then bend at the end of their travel to a receiving antenna. It limits the affect of signal  
fading.  
6.  
7.  
To minimize blocking in high traffic area, install the base stations required to meet the estimated traffic  
demand. When multiple base stations are needed in the same location, you may mount base stations  
as close as one meter apart (to avoid one obstruction to the other according to the rule 2).  
The base stations are designed to use frequencies that are not in use yet, so there is no problem of  
interference between base stations that are mounted near each other.  
48  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
8. In multi-story environments, it is the best to plan coverage for each floor separately. However, because  
RF signals can travel between floors, a single base station could support multiple floors as long as  
base station broadcast area, traffic requirements, and other general guidelines are kept in mind.  
Usually, DECT wave is attenuated by reflection indoors. In order to minimize attenuation, when you  
install a base station on the wall, give at least three-wave-length intervals. The intervals should be at  
least 45 centimeters because the wavelength is 15 centimeters at DECT frequency.  
The best communication environment is when a base station and a user are in the same height. In  
office environment, however, it is desirable to consider office furniture to minimize reflection, diffraction  
and scattering of DECT wave when you set the position of a base station.  
The appropriate position for a base station is where 1.8meter above from the floor and 0.5 meter below  
from the ceiling. The top of iron office furniture such as a cabinet or a desk is not a good position. Keep  
away from electronic equipment such as a copy machine, a printer or a computer. And the lower wall of  
a corridor where many people pass by, corner of a wall, and narrow indoors also should be avoided.  
Attenuation  
When determining the location of base station, you should consider the effects of attenuation. Attenuation is  
the loss of strength of a RF signal due to distance, antenna positioning, and obstructions. The guidelines  
provided in Location of Base Station on sub-clause C take attenuation into account, but this section provides  
additional important concepts.  
The magnitude of change in signal strength is measured in decibel(dB). Increasing or reducing of 3dB  
results in doubling or halving signal power strength.  
Distance  
[Table 3.6.1] shows the signal attenuation caused by distance in direct line of sight condition.  
Distance  
1 meter  
Attenuation (dB)  
0
10 meters  
100 meters  
1000 meters  
20  
40  
60  
[Table 3.6.1] Signal Attenuation in Direct Line of Sight Condition  
Obstructions  
RF signals are also attenuated by obstructions in their paths. [Table 3.6.2] shows the attenuation caused by common  
materials in a building. You should try to limit the loss to 60dB.  
Object  
Approximate Loss in dB  
Concrete  
15  
30  
with metal siding  
with window  
Venetian blinds  
Open  
8 to 9  
10  
20  
Closed  
Soft partitioning  
3 to 4  
[Table 3.6.2] Signal Attenuation Caused by Building Materials  
Although signals can travel through obstacles, you should place base stations so that signals begin their travel with a  
clear line of sight and travel through obstacles afterwards. In the example shown in Figure 3.6.12, the base station is  
placed to maximize line of sight in both corridors.  
49  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
BS  
corridor  
corridor  
Figure 3.6.12 Maximizing Line of Sight  
Fading  
Fading refers to the attenuation caused when a signal is reflected and receiving antenna receives multiple  
instances of the signal. A direct signal is always stronger than a reflected signal.  
Base station is designed with two antennas and the capacity to choose the best suited antenna for carrying  
the strongest signal. This design minimizes chances of fading.  
Although signals can travel around corners, you should place base stations so that signals begin their paths  
with a clear line of sight as illustrated in Figure 3.6.12 and then bend to travel to a receiving antenna. It limits  
the effect of signal fading.  
Shadowing of the radio signal  
The following items may well cause shadowing of the radio signal:  
z
z
z
z
z
z
Thickness of walls, especially cavity walls and reinforced concrete walls.  
Windows or glass in doors with steel wire reinforcement or metallic reflection film.  
Steel doors, lift shafts, partitions or walls.  
Fire resistant doors  
A wall of steel cabinets, large computer equipment or machinery.  
Thickness of concrete floors.  
Traffic Guidelines  
Each base station supports four simultaneous calls, but because all users are not simultaneously in call  
statistically, a base station can support a greater number of wireless terminal users in practice.  
Recommended Number  
of Registered Wireless  
Terminals  
Number of maximum  
Simultaneous Wireless  
Number of Cell  
(Base station)  
Conversation  
1
2
3
4
8
12  
20  
[Table 3.6.3] Suitable Wireless Terminal Number according to Base Station Number  
50  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
D. RSSI Monitoring (Possible in GDC-335H only)  
This function helps that the dealer can install base stations without CR instrument. The RSSI (Received Signal Strength  
Indicator) level of a base station of which the wireless terminal is locked is displayed as dBm value on the LCD (The limit  
is -80dbm.). This value is updated periodically.  
z
Press FUNCTION( ) button.  
*
z
z
z
z
Press  
.
To enter Technician menu, press PIN code (‘L’,’G’,’G’,’A’,’P’ = ‘5’,’4’,’4’,’2’,’7’).  
Press FUNCTION( ) button.  
Technician Main Menu is displayed on the LCD.  
4
z
Press  
(Or set ‘<’ mark to ‘4 ShowRSS’ to press UP( ) button or DOWN( ) button and press  
FUNCTION( ) button.).  
(The RSSI value is displayed on the LCD and the value is updated periodically.)  
Press FLASH button to return to Main Menu.  
z
E. Reporting Results  
It is important to make a comprehensive survey report that records test results and provides useful information for the  
engineer who actually install the equipment. The following information should be included in the survey report (see  
Survey Template):  
z
A description of the site, explaining which buildings and grounds are to be included in the report. A description of  
the topography of outdoor areas may be useful.  
z
z
A specification of the construction of the buildings and construction materials.  
Determine the customer requirements for;  
9
9
9
the number of wireless terminals  
required coverage  
performance requirements (traffic density, grade of service, etc.)  
z
z
The location of the GDK-20W System.  
Cabling details. Include a specification of cables already present on the site and a list of new cabling required.  
Include the distance between a base station and a WTIB for existing and new cabling.  
Copies of the maps of the site with the positions of base stations and the cell boundaries. Different cell boundaries  
can be marked with different patterns to avoid confusion, i.e. dotted, dashed, dot dash, etc. Do not use colors as  
these may be lost when photocopying.  
z
Use the following numbering conventions:  
xwyy refers to the identity of the base station, where;  
x is the level (-1 is basement, 0 is ground floor, 1 is 1st floor, etc.)  
w is the base station number.  
yy is the base station position number. This number should be unique.  
xcyy refers to the identity of the cell, where;  
x is the level at which the measurement was made. (-1 is basement, 0 is ground floor, 1 is 1st floor, etc.)  
c is the cell number.  
yy is the base station position number that is being measured.  
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GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
A list of possible configurations will help the customer to decide exactly what is required. A specification of where base  
stations should be placed. This can be marked on the survey map, but additional information such as height and fixing  
instructions should be included where appropriate.  
A specification of the areas that will be covered by the base station and the areas that may cause problems. This can be  
useful when testing the system.  
The theoretical maximum number of overlapping cells is 10, if all time slots and frequencies are used. If not all time slots  
and frequencies are used, this value is higher. However this is unlikely to be reached in practical situations.  
For a large site where a thorough survey has been impossible, it may be prudent to add additional base stations to the  
product offer to allow for unforeseen problem areas.  
Check list for Survey Data  
z
z
z
z
z
z
z
z
z
z
z
z
z
z
Building characteristics (list for each building); Building identification (refer to maps if available); Type of use....  
Dimensions (refer to maps if available)  
Number of floors (refer to maps if available)  
Height per floor  
Partitioning per floor (refer to floor plans if available)  
Construction details (type of construction and materials used)  
Radio coverage requirements....  
List areas which are to be excluded from radio coverage, or where radio coverage is not absolutely required.  
List areas where radio coverage is not feasible or requires specific base stations.  
Objects inside buildings  
Details of furniture, cupboards, machinery, etc. in the interior of buildings per floor.  
Position of GDK-20W DECT.  
Connection between a WTI port and a base station....  
For each base station, the following details of its connection to a WTI port are required:  
9
9
The length of cable between WTI port and base station  
Whether existing cabling is present that might be used and if so, the type of cabling (twisted pair, star quad,  
wire diameter, etc.)  
9
Presence of free pairs, etc. cabling layout (risers, horizontal wiring, distribution frames) and whether existing  
cabling can be used or new wiring is required.  
52  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
DECT Survey Report Template  
-----------------------------------------------------------------------------------------------------------  
Number:  
Date:  
From : ..........................................................................  
[Engineer doing the survey]  
To : ...............................................................................  
[LGE Sales Manager]  
Copy to:  
KOREA  
[Always send a copy to LGE, Korea]  
z
z
Site :  
[Full address of site]  
Execution of survey Engineers :  
Survey carried out by:  
Customer engineer(s) :  
[Names and addresses of engineers who executed  
[Name and address of customer engineer(s)]  
the survey]  
z
z
Date :  
[Date of survey]  
z
z
z
Outline description of site  
[Short description of site (dimensions, environment, number and type of buildings, etc.]  
Number of wireless terminals and expected traffic  
[Description of expected traffic and indication of above or below average traffic areas]  
Test results.  
[This should include the site maps and any additional information that may be useful]  
Connections WTI ports - base stations  
Existing cabling  
z
z
[Indicate what cabling is available and how it is distributed across the site]  
Connection of base stations and cable lengths  
[List for planned base station approximate cable length, and whether existing wiring can be used or new  
cabling is required]  
z
z
z
Base station installation  
[For each base station indicate exactly where it can be installed, e.g. "in the corridor against the wall of room  
32, 2.5m high") and whether customer restrictions apply as to where base stations may be installed]  
Possible configurations  
[List alternative configurations regarding the deployment of base stations. Refer to coverage maps and detail  
areas where coverage cannot be guaranteed]  
53  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
3.6.2.2 Examples  
A. Example 1 - Centralizing Base Stations  
Figure 3.6.13 shows a site with factory and adjoining office area. Both base stations are placed in the  
manufacturing area to accommodate with more users in that area. However, base station BS2 is placed  
closer to the office area to provide coverage in the office area and maximize line of sight through the  
doorway. This is especially important if the wall between the office and manufacturing area is concrete.  
To satisfy guidelines 1 and 2, the base stations are mounted on the ceilings and away from any potential  
obstructions to the antennas.  
If there is another area to the left of the manufacturing area, moving the base station BS1 to the left is  
probably allowed to support users in that area as well. If the manufacturing area does not obstruct base  
station antennas, their broadcast ranges could reach up to 200 meters.  
60m  
manufacturing area  
40m  
BS1  
BS2  
50m  
30m  
office  
front door  
Figure 3.6.13 Centralized Base Station Placement  
B. Example 2 - Base Station Coverage in Adjoining Areas  
The corridors can act as natural pathways for RF signals. When you are trying to cover two types of area,  
placing a base station near a corridor may optimize coverage in both areas.  
In the site shown in Figure 3.6.14, the entrance from the manufacturing area into the café is a high traffic  
area. Placing a base station in the entry area of the cafe will block line of sight to other areas in the cafe.  
Therefore, BS2 should be centrally located in the cafe area. BS1 is centrally located in the manufacturing  
floor area, but aligned with the entrance into the cafe to provide coverage into the cafe.  
cafe area  
manufacturing area  
BS2  
BS1  
office  
concrete  
Figure 3.6.14 Base Station Aligned with Corridor to Adjoining Area  
54  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
C. Example 3 - Maximizing Line of Site  
Figure 3.6.15 shows an office area containing walled offices, cubicles, and conference rooms. Although the  
number of base stations in this environment would depend on the number of wireless terminal users, the  
base stations in the example are aligned with corridors to maximize line of sight instead of placing both base  
stations close to each other. BS1 is placed near the conference rooms and entrance area to accommodate  
more potential traffic in these areas.  
cubicle area  
walled offices  
BS2  
conference  
rooms  
cubicle area  
BS1  
main entrance  
Figure 3.6.15 Location of Base Station in Office Environment  
55  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
3.6.3 Hardware Installation  
A. Equipment Check  
GDK-20W DECT provided Equipment  
WTIB (option)  
Base stations (GDC-200B) , Connecting block and Line cord  
Wireless terminals (GDC-335H, GDC-340H), Single-slot charger (330-SSC, 340-SSC), Battery (330-SBP, rechargeable  
battery AAA size 2 cell) and Adapter (330-HAP)  
GDC-200B, GDC-335H, GDC-340H, Single-slot Charger (330-SSC, 340-SSC), and adapter (330-HAP) are shown at  
Figure 3.6.16 and Figure 3.6.17 in each.  
Line Cord  
Base Station(GDC-200B)  
Wall Mounting Wedge  
Connecting Block  
Figure 3.6.16 Packing Components of GDC-200B  
56  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
Belt clip  
*
330-SBP  
GDC-335H  
LG  
330-HAP  
330-SSC  
Figure 3.6.17 Packing Components of GDC-335H and GDC-340H  
B. Unit Installation  
WTIB Installation  
In a GDK-20W Digital Wireless Key Telephone System, the WTIB is a base station interface board that is installed in the  
SLOT5.  
If the WTIB is installed in a power-on system, the system and/or WTIB can be damaged. Thus after system power is off,  
the WTIB should be plugged in/out to/from the system.  
Base Station Installation  
Before mounting base station permanently, you should determine a suitable location providing the best coverage.  
Employing the GDC-200B mounting template attached at the last sheet of installation manual, mark the location of the  
two screws to mount the Base.  
Mounting Base Station - 1  
The weight of a base station is light as approx. 420g, so it can be mounted on a masonry or dry-wall surface, wooden wall,  
or partition wall. The distance between mounting holes is 121mm as shown in Figure 3.6.18. The base station is  
mounted with 1 1/2 inch or longer screws. Drill pilot holes in the two locations, insert the screws and tighten leaving about  
3mm gap between the wall and screw head. Mount the base station on the screws and tighten the screws securely.  
57  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
Figure 3.6.18 Wall Mounting of Base Station (without wedge)  
Before mounting base station permanently, you should determine locations that provide the best coverage. The wall  
mounting procedure of a base station is as follows:  
Drill two 3.5 mm holes in a fixed wall. To properly position the holes, you can measure the tags on the base station or  
mark the surface through the tag eyelets while holding the base station in place.  
Insert anchors into the drilled holes. Then insert screws in the anchors, leaving a 3 mm gap between the wall and screw  
head.  
Mount the base station eyelets on the screws.  
Mounting Base Station - 2 (Using Wedge)  
Installing the Base Station using the wedge,  
Determine at first the location on wall where the wedge prepared for mounting the base station is to be fixed.  
The wedge should be settled by using two screws on the wall.  
And insert the base station pulling down into the wedge.  
Figure 3.6.19 Wall Mounting of Base Station using Wedge  
58  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
Base Station Cabling  
The Base Station is connected to the WTI(wireless terminal interface) ports of GDK-20W KSU by a twisted one pair  
copper line. The following rules should be obeyed:  
The cable for connecting the KSU with a base station should be a twisted pair cable.  
The cable for connecting the KSU with a base station shall be separately cabled. This connection shall be cabled  
separate to the building cabling using one pair CAT5 cabling.  
Twisted pair shielded cables should be used with all outdoor configurations.  
The following characteristics should be observed for all cables:  
DC resistance: The resistance of a conductor should not exceed 73.4 ohm per km for a temperature of 20 degree.  
Attenuation: The attenuation of any pair should not exceed 17 dB per km on condition of a temperature of 20 degree and  
frequency of 1 MHz.  
Characteristic impedance: Characteristic impedance should remain in the range of 100 ohm _ 15% for a frequency of 1  
MHz.  
Crosstalk: The total crosstalk of any pair (Far-end and Near-end crosstalk), measured over a line length of 1800 metres  
should not exceed 40 mV.  
The maximum connection length depends upon cable size(φ). [Table 3.6.4] shows the resistance and the maximum cable  
length.  
Cable Type  
Resistance  
0.27 /m  
0.18 /m  
0.11 /m  
Maximum Cable Length  
0.4 mm cable (Awg26)  
0.5 mm cable (Awg24)  
0.6 mm cable (Awg22)  
150m  
300m  
450m  
[Table 3.6.4] Cable Resistance and Maximum Cable Length  
Wireless Terminal Installation  
To install GDC-335H (GAP) and GDC-340H (GAP), simply take out the handset and batteries (330-SBP,  
rechargeable battery), charger (330-SSC, 340-SSC) and AC/DC adapter (330-HAP) from the package and  
assemble it. Before using the GDC-335H and GDC-340H, you should recharge the battery fully.  
After inserting a battery, press the power button of GDC-335H (GAP) and GDC-340H (GAP). Figure 3.6.20  
shows the initial LCD. The two icons in the left upside of the LCD are blinking until the GDC-335H is  
subscribed. (In GDC-340H, these icons are not displayed until the GDC-340H is subscribed)  
T R  
S
Y
U
B S  
.
Figure 3.6.20 LCD Message of Unsubscribed GDC-335H (GAP) and GDC-340H(GAP)  
Before using the GDC-335H(GAP) and GDC-340H(GAP), it should be subscribed. Figure 3.6.21 shows the  
LCD message of the subscribed GDC-335H(GAP) and GDC-340H(GAP).  
S T A X X X  
Figure 3.6.21 LCD Message of Subscribed GDC-335H (GAP) and GDC-340H (GAP)  
Refer to the User Guide of the GDC -335H and GDC-340H for the detail information.  
59  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
3.6.4 User subscription/desubscription  
A. System ID  
Description  
System ID is given to the GDK-20W system attached the wireless GAP terminal for identification. System  
ID, which is PARK(Potable Access Rights Key), is written on MBU.  
PARK: 31100013411604  
Authentication Code is entered at only attendant station, before you begin to subscribe wireless terminal  
(GAP) to GDK-20W system. You should get AC code PARK from a system manager. In addition to the  
above, you should get station number of the wireless terminal to be subscribed from a system manager.  
Operation  
In case of confirming system ID  
1) At attendant station  
[Trans/Pgm]  
+
##  
+
Flex. Button 4  
If you press the [Trans/Pgm] button, [Trans/Pgm] LED will flash(60 IPM Flash) and [On/Off] LED  
will be turned on.. Then you can enter then user program mode.  
Dial ‘##’’  
Press Flexible Button 4  
Current PARK code will be displayed in LCD  
In case of changing system ID  
1) At attendant station  
[Trans/Pgm]  
+
##  
+
Flex. Button 6  
+
System ID(PARK)  
+
[Hold/Save]  
CAUTION: Normally you should not change the system ID. If you should change it, please contact LG  
or local dealer in your country.  
If you press the [Trans/Pgm] button, [Trans/Pgm] LED will flash(60 IPM Flash) and [On/Off] LED  
will be turned on. Then you can enter then user program mode.  
Dial ‘##’  
Press Flexible Button 6  
Enter the system ID(PARK code)  
After entering the PARK code, press [Hold/Save] button. Then you can hear confirm tone.  
The key sequence of the PARK : LLP__________PC  
LL : Two digits decimal representation of PARK length (Bit count)  
P______P : 11 octal digits representation of PARK  
C
: Check digit (It is calculated as the sum of each digit in the input stream multiplied by its  
position in the input stream , modulo 11; if the result if 10, this is represented by the “*”.)  
60  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
Conditions  
1) You must program for system ID when you install the system.  
2) If you program system ID, all data that were related to wireless features will be erased.  
3) The initial PARK value is 00000000000000. So the value will be display in LCD at first  
B. Authentication Code  
Description  
Authentication Code is entered at only attendant station before you begin to subscribe wireless  
terminal(GAP) to GDK-20W.  
Operation  
In case of confirming AC code  
1) At attendant station  
[Trans/Pgm]  
+
##  
+
Flex. Button 3  
If you press the [Trans/Pgm] button, [Trans/Pgm] LED will flash(60 IPM Flash) and [On/Off]  
LED will be turned on.. Then you can enter then user program mode.  
Dial ‘##’’  
Press Flexible Button 3  
Current AC code will be displayed in LCD  
In case of changing AC code  
1) At attendant station  
[Trans/Pgm]  
+
##  
+
Flex. Button 3 +  
AC Code(Max 8 Digits) + [Hold/Save]  
The key sequence of the AC code : D______D  
D_______D : Up to 8 digits decimal representation.  
If you press the [Trans/Pgm] button, [Trans/Pgm] LED will flash(60 IPM Flash) and [On/Off] LED  
will be turned on.. Then you can enter then user program mode.  
Dial ‘##’’  
Press Flexible Button 3  
Enter the AC code  
If you press the [Hold/Pgm] button, you will be heard confirm tone.  
Condition  
1) AC code is must be programmed for user subscription.  
2) AC code must be programmed one time after system was installed. If you change AC code under system  
operation, it may not operate properly.  
(Ex : Subscribed terminal may not receive the incoming call or not make an outgoing call)  
3) If PARK value are changed, you must enter the AC code again.  
4) The initial AC code is 000000.  
5) AC code change will not affect the system operation except subscribing new wireless terminal  
61  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
C. User Subscription  
Description  
This procedure is for subscribing the wireless terminal to GDK-20W system.  
Operation  
1) Attendant station  
[Trans/Pgm]  
+
##  
+
Flex. Button 1 + Station Number + Phone Type + [Hold/Save]  
If you press the [Trans/Pgm] button, [Trans/Pgm] LED will flash(60 IPM Flash) and [On/Off] LED  
will be turned on.. Then you can enter then user program mode.  
Dial ‘##’’  
Press Flexible Button 1  
Enter the station number.  
Enter the phone type (LG-GAP for GDK system or standard GAP for any other system). In case  
of LG-GAP terminal, press [1] button. Otherwise press [2] button.  
* Note : In case of GDC-340H, If MPB version is 3.0Aa above, press [3] button.  
Press [Hold/Save] button and confirmation tone is heard.  
If succeeded, the attendant station will display “ SUBSCRIBED: SUCCESS” on the LCD display.  
If failed(ether at attendant or at wireless terminal), repeat ~ steps of the attendant.  
2) At the GDC-335H  
[Function] + 0 + PARK code + [Redial] + AC code + [Redial] + FT No.  
+ [Function]  
Press [Function( )] button  
Press 0  
Enter system ID(PARK )  
Press [Redial ( )] button  
Enter AC code  
Press [Redial ( )] button.  
‘1’,’2’,’3’,’4’ or ‘_’ are displayed on the LCD. A number means FT number that it is not occupied yet.  
The under-bar means the wireless terminal is already subscribed to the system. Therefore, the  
number of ‘_’ means the number of subscribed system. If 4 under-bar are displayed on the LCD,  
that means no subscription is allowed any more. Enter FT number by pressing numeric key if any  
number exists. After selecting, it is possible to re-select FT number by pressing [Flash(R)] button  
to cancel selection.  
Press [Function( )] button  
Success or failure of the subscription is notified with confirmation tone to the attendant and the  
wireless terminal.  
If succeeded, the wireless terminal goes to an idle state and its station number is displayed.  
If failed, repeat ~steps of the attendant and ~steps of wireless terminal.  
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GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
The key sequence of the PARK : LLP__________PC  
LL  
: Two digits decimal representation of PARK length (Bit count)  
P______P : 11 octal digits representation of PARK  
C
: Check digit (It is calculated as the sum of each digit in the input stream multiplied by its  
Position in the input stream, modulo 11; if the result if 10, this is represented by the “*”.)  
The key sequence of the AC code : D_____D  
D_____D : AC value  
FTID : 1 ~ 4  
:
Up to 8 digits decimal representation.  
3) At the GDC-340H  
[MEMU/UP/DOWN] + 5 1 + select Base No + [OK] + AC code  
+
[OK] +  
Display SEARCHING + Display PARK(last 12Digit) +  
[OK]  
Press MENU (UP or DOWN) button.  
Press  
Press  
.
.
Select base number (1~4) using UP or DOWN button and press OK button.  
Enter AC code (up to 8 digits decimal representation) and press OK button  
The wireless terminal tries to search for the registerable system and ‘SEARCHING’ is displayedon  
the LCD. After searching the registerable system, PARK(last 12digits) value is displayed on the  
LCD.  
If the PARK value displayed is right, press OK button. If the PARK value displayed isn’t right press  
UP or DOWN button. And then the wireless terminal retries to search for the registerable system  
and ‘SEARCHING’ is displayed again.  
Success or failure of the subscription is notified with confirmation tone to the attendant and the  
wireless terminal.  
If succeeded in subscription, the wireless terminal goes to an idle state and its station number is  
displayed.  
If failed, repeat 3) ~ 6) steps of the attendant and 1) ~ 7) steps of wireless terminal.  
Condition  
1) Wireless terminal must be subscribed to system for normal service.  
2) Only attendant can subscribe the wireless terminals(GAP).  
3) Attendant can subscribe another wireless terminal after one subscribing procedure.  
4) If attendant want to subscribe wireless terminal that was subscribed already, it will be heard error  
tone.  
63  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
D. User Desubscription  
Description  
This procedure makes a wireless terminal loose access right to the GDK-20W system. To de-subscribe  
the wireless terminal, it should be in an idle state.  
Operation  
1) Attendant station  
[Trans/Pgm]  
+
##  
+
Flex. Button 2  
+
Station Number  
+
[Hold/Save]  
If you press the [Trans/Pgm] button, [Trans/Pgm] LED will flash(60 IPM Flash) and [On/Off]  
LED will be turned on.. Then you can enter then user program mode.  
Dial ‘##’’  
Press Flexible Button 2  
Enter the station number.  
Press [Hold/Save] button and confirmation tone is heard.  
Success or failure of the subscription is notified with confirmation tone to the attendant and the  
wireless terminal.  
If succeeded in de-subscription, the below LCD message will be displayed. Power-off the  
wireless terminal  
D E S U B S C R I B  
P R E S S  
P W R  
In case of the GDC-340H, If succeeded in de-subscription, GDC-340H tries to synchronize  
to next registered system. If there isn’t next registered system, GDC-340H displays  
“UNREGISTERED” on LCD.  
Condition  
1) Only attendant can de-subscribe wireless terminal  
2) Attendant can de-subscribe wireless terminals those were subscribed already.(If attendant try to de-  
subscribe un-subscribed wireless terminal, it will be heard error tone.  
3) Attendant can de-subscribe another wireless terminal after one de-subscribing procedure.  
4) Attendant can do de-subscribing procedure only when wireless terminal is at the idle state.  
* Notes : If you want to do de-subscribe procedure at wireless terminal and attendant station independently,  
Follow the procedure that described below.  
1) At attendant station  
To erase all data those were subscribed.  
[Trans/Pgm]  
+
##  
+
Flex. Button 7  
+
Password(147*)  
+
[Hold/Save]  
Press the [Trans/Pgm] button, [Trans/Pgm] LED will flash(60 IPM Flash) and [On/Off] LED will be  
turned on.. Then you can enter then user program mode.  
Press ##  
Press flexible button 7  
Enter password.  
Press [Hold/Save], you will be heard confirmation tone.  
To erase a special wireless terminal  
64  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
[Trans/Pgm] ## + Flex. Button 8 + Station Number  
+
+
[Hold/Save]  
Press the [Trans/Pgm] button, [Trans/Pgm] LED will flash(60 IPM Flash) and [On/Off] LED will be  
turned on.. Then you can enter then user program mode.  
Press ## .  
Press flexible 8  
Dial station number that you want to de-subscribe.  
Press [Hold/Save], you will be heard confirmation tone.  
Condition  
1) Wireless terminal must be de-subscribed to system for normal service.  
2) Only attendant can de-subscribe the wireless terminals.  
3) Attendant can de-subscribe another wireless terminal after one subscribing procedure.  
4) If attendant want to de-subscribe wireless terminal that was subscribed already, it will be heard  
error tone.  
2) At the GDC-335H  
[Function] + 9 +  
0000 + [Function]  
+ Select Park number + [Function]  
Press [Function( )] button  
Press 9  
Enter User PIN number “0000”  
Press [Function( )] button  
Select PARK number with UP( ), DOWN( ) key.  
Press [Function( )] button  
If the below LCD message is displayed. Power-off the wireless terminal  
D E S U B S C R I B  
P R E S S  
P W R  
3) At the GDC-340H  
[MENU(UP or DOWN)]  
+ 5 + 2 + PIN Code +  
[OK] +  
or  
(To select FP#) +  
[OK]  
Press MENU(UP or DOWN) button.  
Press (Or set ‘ ’ mark to ‘5 System’ by pressing UP( ) button or DOWN( ) button and  
press OK button).  
>
Press  
(Or set ‘ ’ mark to ‘5 UnRegister’ by pressing UP( ) button or DOWN( ) button and  
>
press OK button).  
Enter PIN code(0,0,0,0) If a user has changed PIN code before, the changed one should be  
entered.  
Press OK button.  
If necessary, press UP( ) button or DOWN( ) button to select FT number which is desubscribed.  
If the desubscribed FT number is displayed on the second line of LCD, stop pressing UP( ) button  
or DOWN( ) button.  
Press OK button.  
* Note  
GDC-340H tries to synchronize to next registered system.  
If there isn’t next registered system, handset displays “UNREGISTERED” on LCD.  
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GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
3.6.5 Summary of DECT Installation  
1. Check and prepare the equipment.  
2. Install a GDK-20W Digital Key Telephone System.  
If necessary, Install the WTIB(optional card)  
3. Determine location of base stations.  
4. Install base stations.  
5. Connect the WTI ports with base stations by twisted one pair cables.  
Wireless terminal interface ports are prepared at the MBU & WTIB.  
6. Program of the PARK at the attendant station.  
7. Register wireless terminal.  
8. Make an initial call.  
66  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
SECTION 4. ISDN DESCRIPTION  
4.1 ISDN Boards in GDK-20W  
1. There are two kinds of ISDN Cards on GDK-20W system, as follows.  
Board Type  
Option  
STIB  
1 Port  
S/T  
STIB 2  
Remark  
2 Ports  
Up: S/T  
Down: T  
2 Card  
Interface  
S/T Interface in STIB can be selected by changing  
the Jump Switch on the STIB Board.  
Maximum number of  
cards on GDK-20W.  
2 Card  
2. You can install STIB within the station and CO line capacity of the system.  
MODEL  
GDK-20W  
Max. Stations  
34  
Max. CO Lines  
8
3. The maximum 8 ISDN devices can be connected to the single S-Interface port, and any kind of ISDN  
devices, which are compatible with ETSI ISDN specification, can be connected to the S-Interface. For  
example, ISDN phone, G4 Fax, video terminal, ISDN PC card, etc. can be connected.  
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GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
4.2 The Basic Features of ISDN Device (S-Interface)  
1. ISDN Devices  
1) There are many ISDN Devices. ( ex. ISDN Phone, Video-Phone, G4 Fax, PC-Card, etc.) GDK-20W  
supports all ISDN Devices which is compatible with Euro-ISDN (ETSI ISDN Specification) till now on.  
2) ISDN Devices can call another station on the GDK-20W and access ISDN CO Lines.  
3) Current LCD Display on ISDN Device is its own Device Feature, not GDK-20W System’s Feature.  
2. Supplementary Service for ISDN Device  
1)  
In GDK-20W, ISDN Station can access the following features,  
A. ISDN Sub Addressing  
B. MSN  
C. Intercom Call  
D. CO Line Access  
E. CO Line Hold.  
F. CO Line Transfer.  
G. Etc.  
2) ISDN Sub Addressing.  
Sub Addressing can be programmed by Station Base Program(Main Menu2) - ISDN Station  
Attribute(Sub Menu2) - Sub Address(Terminal Menu1), its range is YES/NO(Default: NO).  
If ISDN Station is allowed sub addressing by admin. program, in any station  
user who wants to call to ISDN station has to dial the station No and sub address  
for that ISDN station.  
For using ISDN Station’s Sub Address, there is further program on the ISDN Devices. Please consult your ISDN  
Devices manual for programming ISDN Device’s Sub Address.  
Sub Address is useful to the following Features for decoding the single ISDN Device from ISDN Devices on the  
same S-Interface (bus),  
(1) Intercom Call to ISDN Station  
(2) DID Call to ISDN Station  
(3) DISA Call to ISDN Station  
On the other features, Sub Addressing does not effect ISDN Station’s behavior.  
3) ISDN MSN Addressing.  
MSN Addressing can be programmed by Station Base Program (Main Menu2) - ISDN Station Attribute(Sub Menu2) - MSN  
(Terminal Menu3), its range is YES/NO(Default: NO).  
If ISDN station is allowed MSN addressing by admin. program, in any station user who wants to call to ISDN station  
has to dial the station No and MSN address for that ISDN station.  
For using ISDN Station’s MSN Address, there is further program on the ISDN Devices. Please consult your ISDN Devices manual  
for programming ISDN Device’s MSN Address.  
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GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
MSN Address is useful to the following Features for decoding the single ISDN Device from ISDN Devices on the same S-Interface  
(bus),  
(1) Intercom Call to ISDN Station  
(2) DID Call to ISDN Station  
(3) DISA Call to ISDN Station  
On the other features, MSN Addressing does not effect ISDN Station’s behavior.  
4) ISDN Intercom Call.  
Any station can call ISDN Devices by dialing station no. S-Interface has two stations no. So, user  
can call ISDN Devices by dialing one of two pre-assigned stations no. There is no difference  
between calling ISDN Devices with the two stations no which is assigned the same S-Interface.  
If ISDN Device is set to Sub Addressable ISDN, it needs further one digit for calling that ISDN  
Device.  
5) ISDN CO Line Access.  
CO Line Access of ISDN Device is the same as that of Single Line Telephone ( SLT )  
6) CO Line Hold.  
In GDK-20W, system does not use DTMF Receiver for recognizing user’s dialing digit. So if user  
want to use Hold/Transfer Feature on ISDN Device, ISDN Device has the capability of sending  
Keypad Facility Information on the Information Message.  
If possible, holding CO Line Call, send “*#” ( Keypad Facility ), then connected CO Line Call is held  
and user can hear Intercom Dial Tone.  
Retrieving Held CO Line, send “*#” ( Keypad Facility ), then the held CO Line Call is retrieved.  
Please consult your ISDN Device’s Manual for sending “Keypad Facility” after connection.  
7) CO Line Transfer.  
In GDK-20W, system does not use DTMF Receiver for recognizing user’s dialing digit. So if user  
want to use Hold/Transfer Feature on ISDN Device, ISDN Device has the capability of sending  
Keypad Facility Information on the Information Message.  
If possible, holding CO Line Call, send “*#” ( Keypad Facility ) and dial the station No to transfer the  
call, then connected CO Line Call is held and user can hear Intercom Dial Tone.  
Retrieving Held CO Line, send “*#” ( Keypad Facility ), then the unanswered CO Line Transfer Call  
is retrieved.  
Please consult your ISDN Device’s Manual for sending “Keypad Facility” after connection.  
8)  
Etc.  
ISDN station accesses the above features. Other features are not supported currently.  
ISDN station cannot be the master of Conference.  
ISDN station cannot call Station which is activated Off-net Call Forward.  
ISDN station cannot be Attendant Station.  
ISDN station cannot accept additional ring when it is involved in a call whether the ring is  
external or internal.  
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GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
4.3 The Features of ISDN CO Line ( T-Interface )  
1. Normal CO Line Features  
Normal CO Line Features of STIB/BRI is the same as Analog CO Line. Normal CO Line Features are  
described GDK-20W Manual. Consult your GDK-20W for normal CO Line Features.  
2. MSN  
GDK-20W will receive some called party number from PX via DID line, then looks up the MSN address  
TABLE, ISDN Program (Main Menu 4) - MSN Table (Sub Menu 9) to provide ring signal to an ISDN  
internal port.  
GDK-20W will send the information including the called party number to the ISDN station that is  
ringing.  
(1) Maximum table entry : 24.  
(2) The CO line should be programmed as DID Line, CO Base Program (Main Menu 3) – ISDN  
Attribute(Sub Menu 2) - DID Use(Terminal Menu 4).  
(3) If the called party number is not matched with MSN table then GDK-20W will treat the call like  
as DID.  
(4) If the called CO line number is not programmed then search all tables.  
(5) If there is matched CO line number in MSN address table then search only matched entry of  
the table.  
(6) Maximum 8 device can be connected to a S0 port.  
(7) MSN Table. ISDN Program (Main Menu 4) - MSN Table (Sub Menu 9)  
Item  
Flex  
CO Line Number  
Telephone Number  
Station Number MSN Number  
1
4
2
3
Range  
1-8  
Max 20 Digits  
2 or 3 Digit  
Station Number  
None  
1-8  
Default  
None  
None  
None  
3.  
D.I.D. ( Direct Inward Dialing )  
The system operates DID CO, if ISDN CO assigns DID CO through CO Base Program (Main Menu3) –  
ISDN Attribute (Sub Menu2) – DID Use (Terminal Menu 4). If you want to call to a ISDN station which  
assigns sub-addressing of DID or DISA, you should dial station numbers and sub-address or MSN  
number (1-8).  
If your PX send full called party number(area code + prefix number of DID, real DID number(for station  
number)) and then please set CO Base Program (Main Menu3) - ISDN CO Attribute (Sub Menu2) -  
DID_RN(Terminal Menu2) to length of (area code + prefix did number)).  
4.  
CLIP (Calling Line Identification Presentation)  
When a call exists through DISA or DID, Calling line identification(CLI) of the incoming call will be  
displayed on the internal called station’s keyset if PX provide CLI information.  
-. Calling line identification (CLI) or name which is matched with the speed dial list is displayed to  
original called party extension.  
-. First, The system search station speed dial buffer to find out the programmed name, and if  
there is not matched then search system speed dial buffer.(Not implemented Yet)  
-. CLI information will be printed in SMDR record through RS-232 port.  
70  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
5. COLP (Connected Line Identification Presentation)  
Each station user can send CLI information to called party through ISDN line if PX service this  
supplementary service.  
There are 8 type of calling party number, But at this moment GDK only support four kinds of type.  
(UNKNOWN / NATIONAL TYPE / INTERNATIONAL / SUBSCRIBER)  
-. COLP field determines what is used to generate my CLI information in setup message, it  
indicate entry of CO Base Program (Main Menu3) - ISDN Line Attribute(Sub Menu2) -  
OLP(00)(Terminal Menu1).  
-. When a internal user seize a ISDN(DID) line which is programmed for COLP, GDK system will  
make calling party number using ISDN COLP TABLE and extension number in setup message.  
-. UNKNOWN TYPE :  
Insert the calling station number at calling party number information field in setup message.  
-. NATIONAL TYPE :  
Insert my area code if exist. ISDN Program (Main Menu4) - My Area Code (Sub Menu6)  
Insert prefix of COLP number. ISDN Program(Main Menu4) - COLP Table(Sub Menu8)  
Insert the calling station number.  
Ex) The calling station(100) seize a ISDN line 01 which is programmed as COLP(01),  
COLP Table(Main Menu4 - Sub Menu 8) (01 : “5001”, prefix of COLP number) and MY  
AREA CODE(0343).  
CLI in setup message : “03435001100”  
-. INTERNATIONAL TYPE :  
Insert my nation code if exist. ISDN Program (Main Menu4) - My Nation Code (Sub Menu7)  
Insert my area code if exist. ISDN Program (Main Menu4) - My Area Code (Sub Menu6)  
Insert prefix of COLP number. ISDN Program(Main Menu4) - COLP Table(Sub Menu8)  
Insert the calling station number.  
Ex) The calling station(100) seize a ISDN line 01 which is programmed as COLP(01),  
COLP Table(Main Menu4 - Sub Menu 8) (01 : “5001”, prefix of COLP number) ,MY AREA  
CODE(0343) and MY Nation Code(82).  
CLI in setup message : “8203435001100”  
-. SUBSCIBER TYPE :  
Insert prefix of COLP number. ISDN Program(Main Menu4) - COLP Table(Sub Menu8)  
Insert the calling station number.  
Ex) The calling station(100) seize a ISDN line 01 which is programmed as COLP(01),  
COLP Table(Main Menu4 - Sub Menu 8) (01 : “5001”, prefix of COLP number), MY AREA  
CODE(0343) and MY Nation Code(82).  
CLI in setup message : “5001100”  
71  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
SECTION 5. CAPACITIES & FEATURE CODES  
5.1 SYSTEM CAPACITIES  
ITEM  
Max No of Stations  
FP II  
GDK-20W  
REMARK  
67  
34  
Max No of CO lines  
34  
8
Max DSS/DLS Console per station  
No of CO line Groups  
2
0
9
4
No of Attendants  
5
1
No of Internal Page Zones  
No of System Speed Dial Bins  
No of Station Speed Dial Bins Per Station  
No of SMDR Records  
5
2
200  
79  
20  
20  
100 (Option 1900)  
-
No of External Relays  
2
2
No of Power Failure Circuit  
Number of Automatic Fax Transfer  
Number of DVIB  
2
0
-
1
2
8
1
2
Number of Channel / DVIB  
Max Record Time  
System : 3 Minutes  
User : 17 Minutes 30  
Seconds  
68 Minutes  
(Basic)  
Additional 70-minute  
record time is available  
with the optional board  
installed. Total number of  
messages is 400 with the  
option.  
Number of User Voice Messages  
250 EA  
200 EA  
(Basic)  
Default Voice Data  
Prompts  
System  
Prompts  
Battery Backup Voice Messages  
All the messages  
All the messages are  
saved with the backup  
switch on.  
Announcements  
When backup switch is  
set off, only system  
greetings and prompts  
are saved. Recorded  
user messages are  
deleted after reset.  
Number of Station Group  
8
4
Max Number of Member in Group  
32 Stations  
10 Stations  
72  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
5.2 FEATURE CODES  
5.2.1 NUMBERING PLAN*1  
FEATURES  
Station Intercom Number  
CODES  
REMARKS  
100 - 133  
81-84  
Programmable 100 - 499  
CO Line Access ,Group  
CO Line Access ,Individual  
Retrieve a Held CO Line - Individual  
Retrieve a Held CO Line  
Attendant  
881-888  
8#1 - 8#8  
8##  
SLT  
SLT  
0
CO Line Access, First Accessible Group  
Call Waiting (Camp-on)  
Page, All Call  
9
*
ICM Busy Tone  
#0  
B
B
Page, Internal Zone  
External Page  
#1 - #2  
#3  
Page, Meet Me  
#6, [HOLD/SAVE]  
52  
B (#6)  
SLT, Last Number Redial (LNR)  
SLT, DND  
SLT  
53  
SLT, WHTU  
SLT, Call Forward  
54  
SLT, WHTU  
SLT, Speed Dial, Program  
SLT, Speed Dial, Access  
Alarm Reset  
55  
SLT  
58  
SLT  
65  
B
Pick-Up  
66  
B
UNA  
69  
B
2/8 Btn, Message Wait / Call Back - Request  
2/8 Btn, Message Wait - Answer  
SLT, CO Flash  
[PGM]+56  
57  
2/8 Button  
2/8 Button  
SLT  
Hook Flash + 51  
Hook Flash + *  
Hook Flash + 56  
Hook Flash + 59  
[PGM]+#1  
[PGM]+*#  
[PGM]+*5  
[PGM]+*6  
[PGM]+##  
[PGM]+40  
[PGM]+41  
[PGM]+42  
[PGM]+49 + 1/2/3  
[PGM]+50+1/2/3/4  
[PGM]+58  
[PGM]+73  
[PGM]+84  
[PGM]+85  
[PGM]+90  
[PGM]+91  
[PGM]+92  
[PGM]+93  
[PGM]+95  
[PGM]+97  
[SPEED]+*, [REDIAL]  
#*1-2  
SLT, Call Waiting (Camp-on)  
SLT, Message Wait / Call Back  
SLT, CO Hold  
SLT, ICM Busy Tone  
SLT  
SLT  
Attendant, Clock Set  
Admin Program Start  
Attendant, Date Format Change  
Attendant, Time Format Change  
Attendant, WHTU Subscribe/ De-subscribe  
Version Display  
Attendant  
100  
Attendant  
Attendant  
Attendant  
Wake-Up Program  
Wake-Up Cancel  
Station, Attendant  
Station, Attendant  
Keyset only  
ICM Signal Mode - HF/TN/PV  
Differential Ring  
Keyset only  
COLR Key  
B Only  
BGM  
B
Loop Key  
B Only  
Call Wait Key  
B Only  
SPEED Key  
B Only, 2/8 Button Only  
B Only, 2/8 Button Only  
B Only, 2/8 Button Only  
B Only, 2/8 Button Only  
B Only, 2/8 Button Only  
B Only, 2/8 Button Only  
CONF Key  
CALL BK Key  
DND Key  
MUTE Key  
REDIAL Key  
Last Number Redial (LNR)  
Door Open  
73  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
FEATURES  
CODES  
REMARKS  
Attendant  
DVIB – Recording System Announcements  
DVIB – Recording User Greeting  
(With DVIB Station Forward Timer)  
DVIB – Recording User Greeting  
(With fixed 4 seconds timer)  
Call Forward to DVIB Port  
[TRANS/PGM]+#4  
[MON]+[DND/FOR]+7+#  
Note 1)  
Note 1)  
Note 2)  
Note 2)  
-
[MON]+[DND/FOR]+7  
-
(With DVIB Station Forward Timer)  
Call Forward to DVIB Port  
(With fixed 4 seconds timer)  
DVIB – Delete User Greeting  
Call Forward – Cancel  
[MON]+[DND/FOR]+7+*  
[MON]+[DND/FOR]+#  
[TRANS/PGM]+*1  
[TRANS/PGM]+*2  
61-64  
Note 3)  
Note 4)  
To Set Current Time - 1 Hour early  
To Set Current Time - 1 Hour late  
Station Pilot Number  
Attendant  
Attendant  
VM MSG Wait Enable  
*8  
VM MSG Wait Disable  
*9  
ISDN Supplementary HOLD  
ISDN Supplementary CONF  
Two Way Recording  
[TRANS/PGM]+*75#  
[TRANS/PGM]+*77#  
[TRANS/PGM]+#4  
Button Only  
Button Only  
Button Only  
*1: Numbering Plan can be changed according to nation.  
*2: B - Button program is available.  
*3: WHTU : Wireless Handset Telephone Unit.  
Note 1) Call Forward to DVIB is activated after recording User Greeting. When user dials forward type “7” and if there is  
recorded User Greeting already, then user may not record User Greeting again and recorded User Greeting is  
used.  
Note 2) User Greeting should be recorded before Call Forward to DVIB port. When user hangs up after the forward type  
“7” and if there is no recorded User Greeting, then forward is not activated.  
Note 3) If a station is forwarded to DVIB port, Call Forward is canceled after deleting User Greeting.  
Note 4) Only Call Forward to DVIB port is canceled and recorded User Greeting is not deleted. User can delete User  
Greeting by [MON]+[DND/FOR]+7+*.  
Note 5) WHTU is able to support some features in Numbering Plan. To access feature codes in numbering plan, you  
should press [ON/OFF (  
OK button is pressed longer than 1 second) at first, WHTU(LG GAP phone) will enter WHTU local program  
mode. So you are going to program or access features in system, you should press [ON/OFF( )] button at  
)] button at first. If the [FUNCTION( )] button is pressed (in case of GDC-340H,  
first. The [FUNCTION( )] button (in case of GDC-340H, OK button pressed longer than 1second) is same as  
the [TRANS/PGM] button of DKTU.  
74  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
5.2.2 BASIC AND EXTENDED NUMBERING PLANS  
FEATURES  
BASIC  
EXTENSION  
REMARKS  
Station Intercom Number  
10-49 or 100 - 499 10-99 or 100-999 2 or 3 digit station  
numbers by Admin  
CO Line Access ,Group  
CO Line Access, Loop  
CO Line Access ,Individual  
Retrieve a Held CO Line - Individual  
Retrieve a Held CO Line  
Attendant  
81-84  
*81-*84  
85  
*85  
881-888  
*881-*888  
8#1 - 8#8  
*8#1 - *8#8  
SLT  
SLT  
8##  
*8##  
0
0
CO Line Access, First Accessible Group  
Call Waiting (Camp-on)  
Page, All Call  
9
*9  
*
*
ICM Busy Tone  
#0  
#0  
B*1  
B
Page, Internal Zone  
#1 - #2  
#3  
#1 - #2  
#3  
External Page  
Page, Meet Me  
#6, [HOLD/SAVE] #6,  
[HOLD/SAVE]  
*52  
B (#6)  
SLT, Last Number Redial (LNR)  
SLT, DND  
52  
SLT  
SLT/WHTU*2  
53  
*53  
SLT, Call Forward  
SLT, Speed Dial, Program  
SLT, Speed Dial, Access  
Alarm Reset  
54  
*54  
SLT/WHTU  
55  
*55  
SLT  
58  
*58  
SLT  
65  
*65  
B
Pick-Up  
66  
*66  
B
UNA  
69  
*69  
B
2/8 Btn, Message Wait / Call Back -  
Request  
[PGM] + 56  
[PGM] + #56  
2/8 Button  
2/8 Btn, Message Wait - Answer  
SLT, CO Flash  
57  
*57  
2/8 Button  
SLT  
Hook Flash + 51  
Hook Flash  
#51  
+
SLT, Call Waiting (Camp-on)  
SLT, Message Wait / Call Back  
Hook Flash + *  
Hook Flash + *  
Hook Flash  
#56  
SLT, ICM Busy Tone  
SLT  
Hook Flash + 56  
+
+
SLT, CO Hold  
Hook Flash + 59  
Hook Flash  
#59  
SLT  
*1: B - Button program is available.  
*2: WHTU - Wireless Handset Telephone Unit  
Remark) Extension Numbering Plan will be selected by Admin Program.  
5.2.3 LCD MONTHS  
1
2
3
4
5
6
7
8
9
10  
11  
12  
English  
Italian  
JAN FEB MAR APR MAY  
GEN FEB MAR APR MAG  
JUN  
GIU  
06  
JUL  
LUG  
07  
AUG  
AGO  
08  
SEP  
SET  
09  
OCT NOV DEC  
OTT  
10  
NOV  
11  
DIC  
12  
Finnish  
Danish  
Dutch  
01  
02  
03  
04  
05  
JAN FEB MAR APR  
JAN FEB MRT APR  
JAN FEB MAR APR  
JAN FEB MAR APR  
JAN FEB MAR APR  
MAJ  
MEI  
MAJ  
MAI  
MAI  
JUN  
JUN  
JUN  
JUN  
JUN  
JUN  
JUL  
JUL  
JUL  
JUL  
JUL  
JUL  
AUG  
AUG  
AUG  
AUG  
AUG  
AGO  
SEP  
SEP  
SEP  
SEP  
SEP  
SEP  
OKT  
OKT  
OKT  
OKT  
OKT  
NOV DEC  
NOV DEC  
NOV DEC  
NOV DES  
Swedish  
Norwegian  
German  
Spanish  
NOV  
DEZ  
DIC  
ENE FEB MAR ABR MAY  
OCT NOV  
* Finnish example of date:  
- 30-07-98 (In case of DDMMYY order, System Base Program(Main Menu5) - LCD Display Mode (Sub Menu4)  
75  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
5.2.4 AUDIBLE SIGNALS  
TONE / RING  
CADENCE  
Alarm Ring, Continuous  
Alarm Ring, Single  
All Call Page Tone  
Busy Tone  
0.2 sec ON / 0.2 sec OFF Repeat  
1 sec ON  
1 sec ON  
0.35 sec ON / 0.35 sec OFF Repeat  
0.3 sec ON / 0.3 sec OFF Repeat  
0.2 sec ON / 0.2 sec OFF Repeat  
0.25 sec ON / 0.25 sec OFF Repeat  
Australia  
Finland, EU  
Spain  
Sweden  
Denmark  
Others  
0.5 sec ON / 0.5 sec OFF Repeat  
CO Ring Back Tone  
CO Ring  
New Zealand 1 sec ON / 3 sec OFF Repeat  
Others  
Finland  
Italy  
1 sec ON / 2 sec OFF Repeat  
1 sec ON / 4 sec OFF Repeat  
Others  
0.4 sec ON / 0.4 sec OFF / 0.4 sec ON / 2 sec OFF Repeat  
LCR Dummy CO Dial Tone  
Confirm Tone  
Continuous  
1.2 sec ON  
DND Tone  
0.2 sec ON / 0.2 sec OFF / 0.2 sec ON / 0.2 sec OFF / 0.2 sec  
ON / 0.5 sec OFF Repeat  
Dial Tone  
Finland  
0.2 sec ON / 0.3 sec OFF / 0.2 sec ON / 0.3 sec OFF / 0.2 sec  
ON / 0.8 sec OFF Repeat  
EU  
0.2 sec ON / 0.3 sec OFF / 0.7 sec ON / 0.8 sec Off Repeat  
Continuous  
2.5 sec ON / 0.5 sec OFF Repeat  
0.2 sec ON / 0.2 sec OFF Repeat  
Others  
Australia  
Finland  
Italy  
Error Tone  
Spain  
0.6 sec ON / 1 sec OFF Repeat  
Sweden  
Others  
0.25 sec ON / 0.75 sec OFF Repeat  
0.25 sec ON / 0.25 sec OFF Repeat  
0.2 sec ON / 0.2 sec OFF 3 Times  
HFTB Warning Tone  
Intercom Ring  
Finland  
Italy  
0.6 sec ON / 0.2 sec OFF / 0.6 sec ON / 4 sec OFF Repeat  
0.6 sec ON / 0.2 sec OFF / 0.2 sec ON / 4 sec OFF Repeat  
0.8 sec ON / 2.4 sec OFF Repeat  
Others  
Reminder Tone  
Ring Back Tone  
0.5 sec ON / 0.5 sec OFF 3 Times  
0.4 sec ON / 0.2 sec OFF / 0.4 sec ON / 2 sec OFF Repeat  
Australia  
New Zealand  
Denmark  
Finland  
EU  
1 sec ON / 4 sec OFF Repeat  
Italy  
Netherlands  
Norway  
Spain  
Sweden  
Others  
1.5 sec ON / 3 sec OFF Repeat  
1 sec ON / 5 sec OFF Repeat  
1 sec ON / 2 sec OFF Repeat  
-
SLT  
SLT RING  
CADENCE  
SLT CO Ring  
Finland, Italy 1 sec ON / 4 sec OFF Repeat  
New Zealand 0.4 sec ON / 0.2 sec OFF / 0.4 sec ON / 2 sec OFF Repeat  
Spain  
Others  
Finland  
Italy  
1 sec ON / 3 sec OFF Repeat  
0.4 sec ON / 0.2 sec OFF / 0.4 sec ON / 4 sec OFF Repeat  
0.4 sec ON / 0.2 sec OFF / 0.4 sec ON / 4 sec OFF Repeat  
0.6 sec ON / 0.2 sec OFF / 0.2 sec ON / 4 sec OFF Repeat  
SLT Intercom Ring  
New Zealand 1 sec ON / 2 sec OFF Repeat  
Spain  
0.4 sec ON / 0.2 sec OFF / 0.4 sec ON / 3 sec OFF Repeat  
Others  
1 sec ON / 4 sec OFF Repeat  
76  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
5.2.5 FREQUENCIES AND TONES  
77  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
78  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
5.2.6 GDK-20W CONFIGURATION  
Basic  
STA  
Basic Base  
Station  
WTIB SLOT  
Base Station  
CO SLOT1  
CO  
SLOT2  
TOTAL  
1 Base Station  
4 key + (4 Simultaneous  
2 Base Station  
(8 Simultaneous  
Wireless Calls )  
LCOB /LCOB2/STIB/STIB2 STA : 100-103 (DKTU)  
104-105(SLT)  
2 slt  
(4 port  
with  
Wireless Calls )  
LCOB : 2LCO  
STA : 106-109(LKD 2B DKTU  
In primary 100-103)  
WHTU :110-129  
LCOB2 :4LCO  
STIB : 1T0  
2B )  
STIB2 : 1T0 + 1T0/1S0  
CO : CO1 – CO8  
or  
CO : CO1-CO4 and  
4 S0 Station (130-133)  
5.2.7 GDK-20W STATION CONFIGURATION WITH LKD 2B  
BASIC  
DEFAULT STA NUMBER  
100 -105 : 4 LKD 2B Primary devices and 2 slts  
4 LKD 2B + 2 slt  
106 -109 : Secondary devices of 100-103 (LKD 2B DKTU)  
110 -129 : Wireless Telephones  
130 -133 : 4 S0 stations in two STIB2 SLOTs  
1) LKD 2B occupies 4 station numbers, one for the Primary device and the other for the Secondary device. It can  
be connected to Basic 4 DKT ports.  
2) If LKD 2B is connected to any 4 DKT port in MBU, it occupies only 1 station number, for the Primary device. It  
means that the station can not have any Secondary device even if there is DTIU or SLIU for the Secondary device  
in it.  
3) LKD 2B without either DTIU or SLIU(Basic LKD 2B) occupies 1 station number, for the Primary device.  
4) Note: DTIU, SLIU are the sub boards in LKD 2B for the Secondary device DKTU or SLT.  
5.2.8 MAXIMUM NUMBER OF STATIONS IN GDK-20W : 34 PORTS  
NUMBER OF PORTS  
DEFAULT STATION NUMBER  
DESCRIPTION  
6
100-105  
4 Basic DKT ports and 2 Basic slt ports  
4
20  
4
106-109  
110-129  
130-133  
4 Secondary devices for 4 basic DKT ports  
Registrable Max. Wireless Telephones  
(Max. Simultaneous Wireless Call : 12 )  
4 S0 stations in STIB second S0  
( When STIB2 is installed in SLOT2 and 3)  
5.2.9 MAXIMUM NUMBER OF CO LINES IN GDK-20W : 8 PORTS  
NUMBER OF PORTS  
DEFAULT CO NUMBER  
DESCRIPTION  
8
CO 1-8  
STIB2 or LCOB2 in SLOT 2 and 3  
(4 BRI in STIB 2T0 or 4 LCO in LCOB2 )  
79  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
5.2.10 MAXIMUM NUMBER OF PORTS (STATION / CO) IN GDK-20W : 38 PORTS  
NUMBER OF PORTS  
DEFAULT NUMBER  
DESCRIPTION  
6
4
100-105  
106-109  
4 Basic DKT ports and 2 Basic slt ports.  
for 4 basic DKT ports  
20  
8
110 -129  
20 Wireless Terminals  
CO 1-8  
8 BRI or 8 LCO  
CO 1-4 or 130-133  
4 BRI / 4 S0 stations in STIB2 on SLOT2 and 3  
5.2.11 WIRELESS CELL / TERMINAL CONFIGURATION  
Number of Cell  
Recommended Number of  
Number of maximum Simultaneous  
(Base station)  
Registered Wireless Terminals  
Wireless Conversation  
1
2
3
4
8
12  
20  
5.2.12 GAIN CONTROL(SYSTEM BASE(MAIN MENU 5) - (SUB MENU 14))  
-
Digital Keyset RX Gain  
Country  
DKTU  
SLT  
CO  
DCO  
DTMF  
Tone  
DVU  
Int  
Ext  
WHTU  
Music  
Music  
Australia  
Belgium  
CIS  
22  
33  
25  
17  
25  
25  
17  
32  
10  
30  
26  
26  
25  
25  
21  
19  
27  
24  
13  
27  
35  
13  
24  
12  
24  
28  
21  
35  
35  
36  
14  
21  
29  
16  
30  
29  
16  
10  
16  
38  
28  
31  
29  
16  
33  
30  
21  
32  
26  
29  
29  
26  
21  
32  
32  
33  
26  
15  
15  
33  
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
32  
33  
32  
33  
32  
15  
33  
33  
32  
33  
32  
33  
15  
15  
32  
20  
20  
32  
32  
32  
32  
20  
32  
20  
32  
32  
32  
32  
32  
32  
22  
33  
29  
26  
29  
26  
26  
33  
32  
26  
29  
25  
26  
29  
29  
22  
33  
29  
26  
29  
26  
26  
33  
32  
26  
29  
25  
26  
29  
29  
22  
33  
25  
17  
25  
25  
17  
32  
10  
30  
26  
26  
25  
25  
21  
Denmark  
Finland  
Germany  
Italy  
Netherlands  
New Zealand  
Norway  
Spain  
Sweden  
UK  
EU  
Others  
80  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
-
SLT Rx Gain  
Country  
DKTU  
SLT  
CO  
DCO  
DTMF  
Tone  
DVU  
Int  
Ext  
WHTU  
Music  
Music  
Australia  
Belgium  
CIS  
36  
27  
32  
27  
26  
36  
27  
39  
28  
15  
26  
28  
36  
32  
10  
32  
21  
32  
32  
16  
38  
32  
32  
32  
32  
32  
32  
32  
32  
30  
32  
26  
32  
32  
32  
32  
32  
32  
32  
36  
32  
32  
32  
32  
21  
32  
26  
32  
32  
23  
23  
32  
26  
29  
32  
24  
28  
23  
32  
24  
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
46  
36  
53  
30  
32  
27  
30  
38  
50  
45  
32  
39  
27  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
36  
29  
32  
37  
29  
29  
37  
32  
50  
18  
32  
31  
29  
32  
20  
36  
29  
32  
37  
29  
29  
37  
32  
50  
18  
32  
31  
29  
32  
20  
36  
27  
32  
27  
26  
36  
27  
39  
28  
15  
26  
28  
36  
36  
10  
Denmark  
Finland  
Germany  
Italy  
Netherlands  
New Zealand  
Norway  
Spain  
Sweden  
UK  
EU  
Others  
-
CO Line Rx Gain  
Country  
DKTU  
SLT  
CO  
DCO  
DTMF  
Tone  
DVU  
Int  
Ext  
WHTU  
Music  
Music  
Australia  
Belgium  
CIS  
34  
21  
35  
34  
23  
35  
34  
28  
33  
38  
30  
31  
35  
35  
19  
32  
29  
32  
32  
32  
31  
32  
32  
32  
32  
28  
32  
32  
32  
36  
24  
26  
24  
16  
28  
32  
26  
24  
24  
24  
28  
32  
32  
24  
24  
32  
26  
32  
20  
32  
32  
30  
26  
31  
32  
24  
32  
32  
32  
24  
31  
38  
43  
32  
32  
19  
38  
31  
27  
38  
36  
34  
23  
30  
28  
29  
36  
32  
39  
32  
29  
39  
43  
33  
37  
32  
41  
10  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
37  
32  
32  
32  
29  
32  
32  
50  
27  
32  
27  
29  
32  
32  
32  
37  
32  
32  
32  
29  
32  
32  
50  
27  
32  
27  
29  
32  
32  
34  
21  
35  
34  
23  
35  
34  
28  
33  
38  
30  
31  
35  
34  
19  
Denmark  
Finland  
Germany  
Italy  
Netherlands  
New Zealand  
Norway  
Spain  
Sweden  
UK  
EU  
Others  
* Note : In Italy, all tones provided during conversation should be decreased by 5db.  
81  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
-
CO Gain Table  
Country  
DKTU  
SLT  
CO  
DCO  
DTMF  
Tone  
DVU  
Int  
Ext  
WHTU  
Music  
Music  
Australia  
Belgium  
CIS  
31  
21  
32  
32  
35  
35  
32  
21  
32  
36  
26  
30  
30  
32  
26  
32  
29  
32  
32  
32  
32  
32  
29  
27  
32  
37  
37  
32  
32  
37  
26  
26  
26  
20  
32  
32  
28  
26  
26  
26  
30  
32  
32  
26  
24  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
29  
32  
32  
28  
38  
25  
32  
25  
25  
32  
26  
28  
32  
32  
32  
25  
25  
32  
32  
36  
32  
37  
37  
37  
37  
36  
32  
37  
32  
40  
37  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
37  
32  
38  
29  
29  
38  
37  
50  
27  
32  
26  
29  
32  
32  
32  
37  
32  
38  
29  
29  
38  
37  
50  
27  
32  
26  
29  
32  
32  
31  
21  
32  
32  
35  
35  
32  
21  
32  
36  
26  
30  
30  
30  
26  
Denmark  
Finland  
Germany  
Italy  
Netherlands  
New Zealand  
Norway  
Spain  
Sweden  
UK  
EU  
Others  
-
DVU Rx Gain  
Country  
DKTU  
SLT  
CO  
DCO  
External  
WHTU  
Music  
Australia  
Belgium  
CIS  
26  
26  
26  
26  
26  
26  
26  
26  
26  
26  
26  
26  
26  
26  
26  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
31  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
26  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
32  
Denmark  
Finland  
Germany  
Italy  
Netherlands  
New Zealand  
Norway  
Spain  
Sweden  
UK  
EU  
Others  
82  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
-
DTMF RECEIVER Rx Gain  
Country  
SLT  
CO  
DCO  
Australia  
Belgium  
CIS  
32  
24  
20  
35  
26  
32  
35  
21  
34  
32  
20  
36  
32  
20  
37  
16  
24  
24  
24  
24  
32  
24  
11  
16  
32  
24  
34  
32  
24  
24  
32  
24  
24  
34  
32  
32  
34  
24  
32  
32  
24  
18  
32  
24  
24  
Denmark  
Finland  
Germany  
Italy  
Netherlands  
New Zealand  
Norway  
Spain  
Sweden  
UK  
EU  
Others  
-
Conversion detected pulse to digit  
# of Pulse  
Country  
1
2
3
4
5
6
7
8
9
10  
New Zealand  
Sweden  
9
0
1
8
1
2
7
2
3
6
3
4
5
4
5
4
5
6
3
6
7
2
7
8
1
8
9
0
9
0
Others  
-
Conversion dialed digit to pulse  
Digit  
1
2
3
4
5
6
7
8
9
0
Country  
New Zealand  
Sweden  
9
2
1
8
3
2
7
4
3
6
5
4
5
6
5
4
7
6
3
8
7
2
9
8
1
10  
9
10  
1
Others  
10  
-
Wireless Handy Terminal Unit  
Country  
DKTU  
SLT  
CO  
DCO  
DTMF  
Tone  
DVU  
Int  
Ext  
WHTU  
Music  
Music  
Australia  
Belgium  
CIS  
22  
33  
25  
17  
25  
25  
17  
32  
10  
30  
26  
26  
25  
25  
21  
19  
27  
24  
13  
27  
35  
13  
24  
12  
24  
28  
21  
35  
35  
36  
14  
21  
29  
16  
30  
29  
16  
10  
16  
38  
28  
31  
29  
16  
33  
30  
21  
32  
26  
29  
29  
26  
21  
32  
32  
33  
26  
15  
15  
33  
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
32  
33  
32  
33  
32  
15  
33  
33  
32  
33  
32  
33  
15  
15  
32  
20  
20  
32  
32  
32  
32  
20  
32  
20  
32  
32  
32  
32  
32  
32  
22  
33  
29  
26  
29  
26  
26  
33  
32  
26  
29  
25  
26  
29  
29  
22  
33  
29  
26  
29  
26  
26  
33  
32  
26  
29  
25  
26  
29  
29  
22  
33  
25  
17  
25  
25  
17  
32  
10  
30  
26  
26  
25  
25  
21  
Denmark  
Finland  
Germany  
Italy  
Netherlands  
New Zealand  
Norway  
Spain  
Sweden  
UK  
EU  
Others  
83  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
SECTION 6. ADMIN PROGRAMMING  
6.1 GENERAL DESCRIPTION  
6.1.1 INTRODUCTION  
The GDK-20W Key Telephone System can be programmed to meet each customer's individual need. All programming is  
done at station 100(DKT 1) using KD-24D, KD-36D, LKD-30D digital key telephone.  
Upon entering the program mode, the key telephone at station 100 cannot operate as a normal telephone but as a  
programming instrument with all of the buttons redefined. The keys of the dial pad are used to enter the various data  
fields and to enter numerical information. The 24 buttons located at the top of the phone (Flex Buttons) are used to  
indicate the specific data field and to enter information. Sometimes [SPEED] button is used to delete the data.  
See TABLE 6.2.2.1 - 6.2.2.10 for default data. If this pre-programming suits the customer, additional Admin program is  
not necessary. To change admin data, the user enter the admin. programming mode and select program code. During  
Admin programming, other keysets in the system operate normally.  
When Admin programming, LCD and LED’s indicate current programmed data and status. If the programmer enters  
correct data, then LCD and LED’s show the entered data and the data is stored in the temporary buffer area. Real  
system databases is not changed and has no effect on telephone operation unless permanent updating procedure is  
executed. Pressing [HOLD/SAVE] button, all data in the temporary buffer (same as LCD and LED’s show their status)  
is saved into permanent memory. Tones are provided to let the programmer know whether data entry is correct  
(confirmation tone) or not (error tone).  
6.1.2 TO ENTER THE PROGRAMMING MODE  
1.  
2.  
3.  
Lift handset or press the [MON] button on the admin station, and hear ICM dial tone (optional),  
Press [TRANS/PGM] button and dials *# (confirmation tone heard),  
Enter Admin. Password if the password has been set. This procedure places the station into the Admin.  
programming mode (confirmation tone heard). And LCD will displays the first step of Admin. programming.(below  
LCD)  
ADMIN PROGRAM START  
PRESS FLEX KEY(1-12)  
84  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
6.1.3 HOW TO PROGRAM  
1.  
2.  
There are 12 main-menus in the Admin. Programming mode.  
Each main program has several sub-menus and each sub-menu can have several terminal menus(sub-menus of a  
sub-menu), but some sub-menus don’t have any terminal-menus(It means that sub-menus are terminal-menus in  
this case). Refer the followings.  
A main-menu has several sub-menus.  
MAIN-MENU  
To select a sub-menu, press a flex-key responding to the sub-menu number.  
A sub-menu may have several terminal-menus, but some sub-menus may not.  
SUB-MENU  
To select a terminal-menu, press a flex-key responding to the terminal-menu number.  
Enter data at the terminal-menu with dialing digits or flex-keys.  
TERMINAL-MENU  
85  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
6.1.3.1 Example of Admin. Program  
PROCEDURE  
(1) When the user enter Admin. mode, LCD displays the first message.  
ADMIN PROGRAM START  
PRESS FLEX KEY(1-12)  
Press a flex-key to select a main-menu among 12 main-menus.(If the  
user program does not include LCR-package, the user cannot enter  
main-menu 10)  
(2) The user selected the 2nd main-menu, “STATION BASE PROGRAM”,  
by pressing the 2nd flex-key in step 1. Dial station range. (The second  
station number must be more than or equal to the first station number)  
STA PGM  
ENTER STA RANGE  
(3) And then, press a flex key(1-8) or /.  
STA PGM,100-100  
STA BASE PROGRAM.  
Flex key(1-8):Select a sub-menu of  
PRESS FLEX KEY(1-8)  
CO LINE BASE PROGRAM.  
:Move to the next main-menu,  
INITIALIZATION.  
:Move to the previous main-menu,  
(4) If the user press a flex key 1, the LCD displays as the left side.  
STA PGM,100-115,ATTRIBUT  
PRESS FLEX KEY(1-10)  
(5) If the user press a flex key 1, the LCD displays as the left side.  
And then press a flex key 1 to change the current value. Press  
[HOLD/SAVE] to update the database permanently.  
- /: Go to the other same level menu.  
STA PGM,100-115,  
YES  
DND  
-
[TRANS/PGM] : Go to the Admin. start menu.  
-
[REDIAL] : Go to the 1 level upper menu.  
86  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
6.1.4 BUTTON DEFINITION  
Buttons are used for the following purposes in the Admin. program mode.  
(1) [HOLD/SAVE] : Update the system database permanently.  
(2) [TRANS/PGM] : Move to the start of admin program menu.  
(3) [REDIAL] : Move to the 1 level upper level menu.  
(SUB-MENU MAIN-MENU or TERMINAL-MENU SUB-MENU)  
(4) : Move to the next menu in the same level.(Round-robin)  
(Ex : DND(1st terminal-menu of STATION ATTRIBUTE) SPEED DIAL ACCESS(2nd terminal-menu of  
STATION ATTRIBUTE)  
: Move to the previous menu in the same level.(Round-robin)  
(Ex 1 : INITIALIZATION(1st main-menu) PRINT DATABSE(last main-menu)  
Ex 2 : STATION CLASS OF SERVICE(3rd sub-menu of 2nd main-menu) ISDN STATION ATTRIBUTE(2nd  
sub-menu of 2nd main-menu) )  
(5) [SPEED] : Clear database of the current terminal menu.  
(6) FLEX-KEY : 1. Used for selecting a menu (main/sub/terminal) responding to the number.  
2. Also used as toggle key for entering data, if entered value has only 2 case number. (i.e: Yes/No,  
Enable/Disable)  
(7) DIGIT : Used for entering data by dialing.  
87  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
6.2 ADMIN PROGRAMMING  
6.2.1 ADMIN PROGRAMMING INDEX  
FLEX KEY  
MAIN MENU  
Initialization  
FLEX KEY  
SUB MENU  
Station Database Initialization  
1
1
2
(DB INIT)  
CO Line Database Initialization  
ISDN Tables Database Initialization  
System Feature Database Initialization  
System Timer Database Initialization  
Toll Table Database Initialization  
Authorization Code Table Database Initialization  
Flexible Station Number Initialization  
Flexible Button Program Initialization  
LCR Database Initialization  
All Database Initialization  
Station Attribute  
3
4
5
6
7
8
9
10  
11  
1
2
Station Base Program  
(STA PGM)  
2
ISDN Station Attribute  
Station Class-Of-Service  
CO Line Group Access  
Preset Call Forward  
3
4
5
6
Flex Buttons Assignment  
Warm Line Selection  
7
8
Page Zone  
3
CO Line Base Program  
(CO PGM)  
1
CO Line Attribute  
2
ISDN CO Line Attribute  
Group Assignment  
3
4
DISA Type  
5
CO Flash Timer  
6
CO Loop Supervision Timer  
CO Line Ring Assignment  
TEI Type  
7
4
ISDN Program  
(ISDN PGM)  
1
2
Calling Sub-Address  
3
Incoming Zero Insertion  
Outgoing Zero Insertion  
Outgoing Check Digit  
4
5
6
My Area Code  
7
My Nation Code  
8
Internal Code  
9
COLP Table (Entry no:01-10)  
MSN Table (Entry no:01-24)  
DID Digit Conversion Table  
Transfer Code  
10  
11  
12  
13  
14  
Supplementary Service  
Loopback  
88  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
FLEX KEY  
MAIN MENU  
FLEX KEY  
SUB MENU  
5
System Base Program  
(SYS PGM)  
1
2
System Attribute  
Attendant Assignment  
3
Setting System Date/Time  
LCD Date/Time Display Mode  
PBX Access Code  
4
5
6
DID/DISA Destination  
DISA Retry Counter  
7
8
SMDR Attributes  
9
Pulse Dial / Speed Ratio  
Alarm Attributes  
10  
11  
12  
13  
14  
15  
16  
17  
External Control Contact  
BGM(Background Music) Type  
MOH(Music On Hold) Type  
System Gain Control  
Fax Transfer CO Line  
External Page Port  
DID/DISA Forward to DVU  
Exclusive Hold Recall Timer  
System Hold Recall Timer  
Transfer Hold Recall Timer  
I-Recall Timer  
6
System Timers  
(SYS TMR)  
Timer -  
1
1
2
3
4
5
6
7
8
9
Attendant Recall Timer  
CO Ring Detect Timer  
CO Ring Stop Detect Timer  
Pause Timer  
CO Release Guard Timer  
10 CO Dial Delay Timer  
11 Preset Forward Timer  
12 Call Forward Busy/No Answer Timer  
13 DID/DISA No Answer Timer  
14 Unsupervised Conference Timer  
15 MSG Wait Reminder Tone Timer  
16 Hook Switch Flash Timer  
17 Door Open Timer(Enhanced)  
18 Inter Digit Timer  
19 Warm Line Timer  
20 SMDR Timer  
21 Wake-up Fail Ring Timer  
22 Fax Tone Detect Timer  
23 Fax CO Call Timer  
24 DVU User Record Timer  
Timer -  
2
1
2
3
DVU Forward Answer Timer  
Valid User Message Timer  
Hunt User Record Timer  
89  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
FLEX KEY  
MAIN MENU  
Toll Table  
FLEX KEY  
SUB MENU  
7
1
2
3
4
5
Toll Exception Table – Allow A (Entry no:01-20)  
Toll Exception Table – Deny A (Entry no:01-10)  
Toll Exception Table – Allow B (Entry no:01-20)  
Toll Exception Table – Deny B (Entry no:01-10)  
1. Canned Toll Table –Allow (Entry no:01-10)  
2. Canned Toll Table –Deny (Entry no:01-10)  
Authorization Code Table (Entry no:01-30)  
8
9
Authorization Code Table  
(Author Code Table)  
Flexible Numbering  
Plan  
-
1
2
Numbering Plan Type(Extension / Basic)  
Station Number Digit Size (3 / 2)  
3
Flexible Station Number Assignment  
1
Flexible number for port 1-24(flex 1-24)  
2
Flexible number for port 25-34(flex 1-10)  
LCR Access Mode  
10  
11  
LCR Program  
1
2
3
4
5
Day Zone  
Time Zone of Day Zone  
LDT Table  
DMT Table  
Station Group Program  
Hunt  
1
2
3
Group Type(Cir/Term/UCD/VM/Ring/None)  
Group Member  
Group  
Attribute of Hunt Group Type  
Cir/Term  
UCD  
1
2
No Answer Timer  
Ring Timer  
1
2
3
First Announcement Timer  
Second Announcement Timer  
Announcement Timer  
Ring Timer  
Put Mail Index  
1
2
VM  
3
Get Mail Index  
VM  
1
2
3
4
5
6
7
Put Mail  
Get Mail  
Busy  
Dialing  
Table  
No Answer  
Error  
DND  
Disconnect  
12  
Print Database  
1
2
Station Database Print  
CO Line Database Print  
ISDN Database Print  
3
4
System Feature Database Print  
System Timer Database Print  
Toll Table Print  
5
6
7
Authorization Code Table Print  
Flexible Station Number Print  
LCR Database Print  
8
9
10  
11  
Hunt Group/Voice Mail Table Print  
All Database Print  
90  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
6.2.2 DEFAULT VALUES  
TABLE 6.2.2.1 STATION BASE PROGRAM (MAIN MENU 2)  
NO SUB MENU FLEX KEY  
TERMINAL MENU  
DND (Do-Not-Disturb)  
Speed Dial Access  
Page Access  
RANGE  
YES / NO  
YES / NO  
YES / NO  
YES / NO  
DEFAULT  
YES  
REMARK  
1
Station  
1
2
3
4
5
6
7
8
9
Attribute  
YES  
YES  
Call Forward Access  
YES  
PLA (Preferred Line Answer) YES / NO  
YES  
Speaker-Phone/Headset  
Auto Speaker Selection  
ICM Box Signaling  
SP / HEAD Speaker-Phone  
YES / NO  
YES / NO  
YES/NO  
YES  
YES  
Automatic Hold  
Station1:YES  
Station2-34:NO  
NO  
10  
11  
12  
13  
Data Line Security  
DVU Access  
YES/NO  
YES/NO  
YES/NO  
YES/NO  
NO  
Two Way Recording  
Bearer Capability 3.1KHz  
NO  
NO  
Flex Key is not 13,  
But 14 in  
Norwegian version  
If this field is set to  
YES, then GDK  
sends the called  
extension number  
in called party sub  
address information  
of setup message  
to ISDN extension.  
2
ISDN Station  
Attribute  
1
Sub Address  
YES/NO  
NO  
2
3
Long/Short  
MSN  
Long/Short  
YES/NO  
Short  
NO  
If this field is set to  
YES, then GDK  
sends the called  
extension number  
in called party  
number information  
of setup message  
to ISDN extension.  
4
5
COLR  
COLP  
YES/NO  
YES/NO  
NO  
YES  
6
7
CLIP  
CLIS  
YES/NO  
YES/NO  
NO  
NO  
3
4
Station COS  
-
Day COS/Night COS  
CO Line Group  
11 - 77  
1-4  
11  
2 Digit  
1st Digit-Day COS  
2ndDigit-Night COS  
1st Flex : CO GRP 1  
:
CO Group  
Access  
1- 4  
1-4  
4th Flex : CO GRP 4  
91  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
NO SUB MENU FLEX KEY  
TERMINAL MENU  
RANGE  
DEFAULT  
REMARK  
5
Preset Call  
Forward  
-
Station No Not Assigned The ISDN station or  
(2 Digit or  
3 Digit)  
ICM box cannot be  
assigned as preset  
call forward station.  
6
Flex Buttons  
Assignment  
1-6  
--  
Type  
1: User Button  
2: CO x  
1-8  
1-4  
-
3: Reserved  
4: LOOP  
STA No.  
SPD Bin  
No. (01-99)  
1-4  
5: STA xxx  
6: SPD xx  
7
Warm Line  
Selection  
-
Not Assigned 1:Flex Button 1)  
2:CO Line  
3:CO Group  
4:Station  
8
9
Page Zone  
-
-
1-2  
1-8  
1
1:Page Zone 1  
2:Page Zone 2  
Except for UK, IT,  
SP version  
Language  
Code  
Each  
Nation’s  
Language  
1) Under following conditions, flex. button cannot be assigned as warm line.  
-
-
If any station among entered range is SLT or 2B-SLT, you cannot save input value.  
If you entered the bigger flex. button number than stations have, you cannot save input value.  
92  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
TABLE 6.2.2.2 CO LINE BASE PROGRAM (MAIN MENU 3)  
NO SUB MENU FLEX  
KEY  
TERMINAL MENU  
RANGE  
DEFAULT  
REMARK  
1
CO Line  
Attribute  
1
2
3
CO Line Type  
PBX / CO  
DTMF / Pulse  
Yes / No  
CO  
DTMF  
No  
CO Line Signal Type  
Universal Night  
Answer (UNA)  
Flash Type  
4
Ground / Loop  
Loop  
Ground type is not  
available  
5
6
7
1
DISA Account  
Loop Supervision  
DVU Announcement  
COLP  
Yes/No  
Yes/No  
Yes/No  
00-10  
No  
No  
No  
00  
ISDN CO  
Line  
Attribute  
2
00:Not Assigned  
01-10:indicate an entry of  
Outgoing COLP table  
00:Do not ignore  
01-99:indicate an ignored  
called party number  
(DID_RN : DID removes  
number from called party  
information)  
2
DID_RN  
00-99  
00  
3
Type of Calling  
Number  
0-8  
2
0:Unknown number  
1:International type  
2:National number  
3:Not used  
4:Subscriber number  
5:Not used  
6:Not used  
7:Not used  
8:No send COLP  
4
-
DID Line Use  
Yes/No  
1 - 4  
No  
1
3
CO Line  
Group  
Assign  
4
5
6
DISA Type  
-
-
-
U/Day/Night/  
Both  
U
008  
0
0/1/2/3  
CO Flash  
Timer  
Ring to Hunt Group 1  
000 - 300  
10msec base  
100msec base  
CO Loop  
Supervision  
0 - 20  
Timer  
CO Line  
Ring  
7
No/Day/Night/ Station 1  
Flex key : Round-robin  
1
2
Ring to Station  
Both  
: All ring  
Station  
2-16: No  
ring  
1
2
3
4
Ring to Hunt Group1  
Ring to Hunt Group2  
Ring to Hunt Group3  
Ring to Hunt Group4  
Assignment  
93  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
TABLE 6.2.2.3 ISDN PROGRAM (MAIN MENU 4)  
FLEX SUB MENU  
KEY  
TERMINAL  
MENU  
RANGE  
DEFAULT  
REMARK  
1
TEI Type  
-
Auto / Fixed  
Auto  
(4 Ports)  
After you changing TEI,  
press RESET button on  
MBU to operate with the  
new TEI type.  
2
Calling Sub-  
Address  
-
Yes / No  
No  
If this field is set to YES,  
then GDK sends the calling  
extension number in calling  
party sub address  
information of setup  
message.  
3
4
5
Incoming Zero  
Insertion  
-
-
-
Yes / No  
Yes / No  
0 – 9  
No  
Yes  
0
Outgoing Zero  
Insertion  
Outgoing  
Check Digit  
My Area Code  
My Nation  
Code  
6
7
-
-
-
-
Not Assigned  
Not Assigned  
8
9
International  
Code  
-
-
-
4 Digits  
Not Assigned  
COLP Table  
Entry No  
(01-10)  
Not Assigned Max : 10 digits  
10  
MSN Table  
Entry No  
(01-24)  
Not Assigned Flex key 1: CO line No.(1-8)  
Flex key 2: Station No (2 or  
3 digits)  
Flex key 3: MSN No. (1-8)  
Flex key 4: Night destination  
( Station no(2digit/ 3digit)  
Or Station Group no(61-64))  
Flex key 5:Night MSN (1-8)  
Flex key 6: Telephone No.  
(max: 20 digits)  
11  
DID Digits  
Conversion  
1.DID Received Digit from  
PX  
2 - 4  
3
2.DID First Two Digits  
Conversion  
DID Received  
Digit No  
***  
0 - 9  
# : Ignore digit  
* : using received digit  
3.DID Second Digit  
10 Digits  
1234567890  
Conversion  
-
12  
13  
Transfer Code  
2 Digits  
Keypad/  
Functional  
* #  
Supplemen- 1.Service 1. Hold/  
Keypad  
tary Service  
Type  
Retrieve  
2. 3-party Conf.  
2.Hold Code  
3.Retrieve Code  
4.3-Party Conf. Code  
-
10 digits  
10 digits  
10 digits  
Yes/No  
Not Assigned  
Not Assigned  
Not Assigned  
No  
14  
Loop Back  
94  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
TABLE 6.2.2.4 SYSTEM BASE PROGRAM (MAIN MENU 5)  
NO SUB MENU FLEX  
KEY  
TERMINAL MENU  
RANGE  
DEFAULT  
REMARK  
1
System  
1
2
3
4
5
Hold Preference  
Privacy  
SYS / EXC  
YES / NO  
SYS  
YES  
Attributes  
External Night Ring  
Multi-line Conference  
CO Line Choice  
YES / NO  
NO  
YES / NO  
NO  
Last Choice /  
Round-robin  
YES / NO  
Last Choice  
6
7
Override 1st CO Group  
Night DVU  
NO  
NO  
YES / NO  
Flex Key is not 7, but  
8 in Spain ver.  
8
Music on Camp-on  
YES / NO  
NO  
Flex Key is not 8, but  
9 in Spain ver.  
2
Attendant  
Assignment  
-
Station No.  
(2 Digits or 3  
Digits)  
100  
ICM box cannot be  
assigned as  
attendant station.  
(1st Station)  
3
4
Set System  
Date/Time  
LCD Display  
Mode  
-
-
1-4  
3
1:24- DD/MM/YY  
(12-DD/MM/YY) 2:24- MM/DD/YY  
3:12- DD/MM/YY  
4:12- MM/DD/YY  
5
6
7
8
PBX Access  
Code  
-
MAX 2 Digits  
Not Assigned Max 4 PBX Access  
Codes  
DID/DISA  
Destination  
DISA Retry  
Counter  
1
2
Busy Destination  
Error Destination  
DISA Retry Counter  
Tone / ATD  
Tone / ATD  
1-9  
Tone  
Tone  
3
SMDR  
1
2
SMDR Print Enable  
SMDR Recording Call  
Type  
YES / NO  
All Call / Long  
Distance  
YES / NO  
1-8  
NO  
Attributes  
All Call  
3
4
Print Incoming Call  
SMDR Print Baud Rate  
(RS-232C)  
NO  
6
1:300Bps  
2:600Bps  
3:1200Bps  
4:2400Bps  
5:4800Bps  
6:9600Bps  
7:19200Bps  
8:38400Bps  
9
Dial Speed  
Ratio  
-
60/40 or  
66/33  
66/33  
(10 PPS Only)  
NO  
10  
Alarm  
1
2
3
1
2
Alarm Enable  
YES / NO  
Close / Open  
Repeat / Once  
1-2  
(Loud Bell  
/Door)  
Attribute  
Alarm Contact Type  
Alarm Signal Mode  
First Contact  
Close  
Repeat  
None  
11  
12  
External  
Control  
Contact  
Second Contact  
None  
BGM Type  
-
-
-
-
1-3  
1
1
1:Inetrnal  
2:External  
3:Both  
1:Inetrnal  
2:External  
13 MOH Type  
1-2  
95  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
NO SUB MENU FLEX  
KEY  
TERMINAL MENU  
RANGE  
DEFAULT  
REMARK  
1. DKTU  
14  
System  
1
2
3
4
Digital Keyset Rx Gain  
00-60  
Gain Control  
2. SLT  
3. CO  
4. DCO  
5. DTMF RX  
6. TONE  
7. DVU  
8. MUSIC1  
9. MUSIC2  
10.WHTU  
1. DKTU  
2. SLT  
SLT Rx Gain  
00-60  
00-60  
00-60  
3. CO  
4. DCO  
5. DTMF RX  
6. TONE  
7. DVU  
8. MUSIC1  
9. MUSIC2  
10.WHTU  
1. DKTU  
2. SLT  
CO Line Rx Gain  
3. CO  
4. DCO  
5. DTMF RX  
6. TONE  
7. DVU  
8. MUSIC1  
9. MUSIC2  
10.WHTU  
1. DKTU  
2. SLT  
Digital CO Line (DCO)  
Rx Gain  
3. CO  
4. DCO  
5. DTMF RX  
6. TONE  
7. DVU  
8. MUSIC1  
9. MUSIC2  
10.WHTU  
1.DKTU  
2.SLT  
5
6
DVU Rx Gain  
00-60  
00-60  
3.CO  
4.DCO  
5.MUSIC2  
6.WHTU  
1.SLT  
DTMF Rx Gain  
2.CO  
3.DCO  
96  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
NO SUB MENU FLEX  
KEY  
TERMINAL MENU  
WHTU Rx Gain  
RANGE  
DEFAULT  
REMARK  
1. DKTU  
14  
System  
7
00-60  
Gain Control  
2. SLT  
3. CO  
4. DCO  
5. DTMF RX  
6. TONE  
7. DVU  
8. MUSIC1  
9. MUSIC2  
10.WHTU  
15  
Fax  
Transfer CO  
Line  
-
-
-
-
1-8  
None  
None  
16  
17  
External  
Page Port  
Station No.  
Only SLT port  
DID/DISA  
Forward To  
DVU  
1
2
Busy  
YES/NO  
YES/NO  
NO  
NO  
No Answer  
97  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
TABLE 6.2.2.5 SYSTEM TIMER PROGRAM (MAIN MENU 6)  
NO  
SUB  
FLEX  
KEY  
SUB MENU  
RANGE  
DEFAULT  
REMARK  
MENU  
1
TIMER  
1
1
2
Exclusive Hold Recall Timer  
System Hold Recall Timer  
Transfer Recall Timer  
000 - 300  
000 - 300  
000 - 300  
000 - 300  
00 - 60  
1 - 9  
060  
030  
030  
030  
01  
2
1 sec base  
1 sec base  
1 sec base  
3
4
I-Hold Recall Timer  
1 sec base  
5
Attendant Recall Timer  
1 min base  
100 msec base  
1 sec base  
1 sec base  
6
CO Ring Detect Timer  
7
CO Ring Stop Detect Timer  
Pause Timer  
01 - 15  
1 - 9  
06  
1
8
9
CO Release Guard Timer  
CO Dial Delay Timer  
01 - 15  
00 - 99  
00 - 99  
00 - 99  
00 - 99  
00 - 99  
00 - 60  
001 - 250  
01  
05  
10  
10  
20  
10  
00  
050  
1 sec base  
10  
11  
12  
13  
14  
15  
16  
100 msec base  
1 sec base  
1 sec base  
1 sec base  
1 min base  
1 min base  
10 msec base  
This is max. Hook  
Flash time.  
100 msec base  
1 sec base  
1 sec base  
Preset Call Forward Timer  
Call Forward Busy/No Answer Timer  
DID/DISA No answer Timer  
Unsupervised Conference Timer  
Message Reminder Tone Timer  
Hook Switch Flash Timer  
17  
18  
19  
20  
21  
Door Open Timer  
Inter-Digit Timer  
05 - 99  
01 - 20  
20  
05  
Warm Line Timer  
SMDR Start Timer  
Wake-up Fail Ring Timer  
01 - 20  
05  
000 - 250  
00 - 99  
000  
20  
1 sec base  
1 sec base  
22  
23  
FAX Tone Detect Timer  
FAX CO Call Timer  
01 - 10  
1 - 5  
05  
1
1 sec base  
1 min base  
24  
1
DVU User Record Timer  
DVU Forward Answer Timer  
Valid User Message Timer  
Hunt Disconnect Timer  
010 - 255  
04 - 40  
20  
04  
04  
03  
1 sec base  
1 sec base  
1 sec base  
1 min base  
2
TIMER  
2
2
00 - 10  
3
01 – 10  
TABLE 6.2.2.6 TOLL TABLE (MAIN MENU 7)  
FLEX KEY  
SUB MENU  
Allowed Table  
TERMINAL MENU  
DEFAULT  
REMARK  
Max : 8 digit  
Max : 8 digit  
Max : 8 digit  
Max : 8 digit  
Max : 8 digit  
Max : 8 digit  
1
2
3
4
5
A
Entry No (01 – 20)  
Entry No (01 – 10)  
Entry No (01 – 20)  
Entry No (01 – 10)  
Entry No (01 – 10)  
Entry No (01 – 10)  
Denied Table  
Allowed Table  
Denied Table  
A
Not Assigned  
B
B
Canned Toll Table : Allow  
Canned Toll Table : Deny  
98  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
TABLE 6.2.2.7 AUTHORIZATION CODE TABLE (MAIN MENU 8)  
SUB MENU  
FLEX KEY  
TERMINAL MENU  
RANGE  
DEFAULT  
REMARK  
Authorization  
Code Tables  
Entry No  
(01-30)  
Not  
-
5 Digit  
Assigned  
TABLE 6.2.2.8 FLEXIBLE STATION NUMBERING PLAN (MAIN MENU 9)  
SUB MENU  
FLEX  
KEY  
TERMINAL MENU  
RANGE  
Extension / Basic  
3 / 2  
DEFAULT  
REMARK  
Numbering Plan  
Type  
-
-
Basic  
3
STA Number Digit  
Size  
-
-
Flexible Station  
Number  
1
2
Flex number for port 1-24  
FLEX KEY 1-24  
100-123 Each flex key denotes  
corresponding station.  
Flex number for port 24-34 FLEX KEY 1-10  
124-133  
TABLE 6.2.2.9 LCR PROGRAM (MAIN MENU 10)  
FLEX KEY  
SUB MENU  
RANGE  
DEFAULT  
REMARK  
1
LCR Access 3-way toggle  
- DISABLE  
Disable  
- OVERRIDE  
- ALWAYS  
2
3
4
Day Zone  
F1: Zone 1. Day : 1 - 7  
1-7  
Each day belongs to only one day  
zone.  
F2: Zone 2. Day : 1 - 7  
F3: Zone 3. Day : 1 - 7  
-
-
Time Zone F1: Zone 1. Time : 00 – 24  
F2: Zone 2. Time : 00 – 24  
00-24  
Each hour belongs to only one time  
zone.  
-
-
F3: Zone 3. Time : 00 – 24  
LDT  
00 – 99  
None  
F1: LCR type, BOTH / INT / COL.  
F2: CD 12 digits  
(Leading  
Digit Table)  
(total:100)  
F3: DMT index. 6 digits. Total three  
DMT indices for each time zone1/2/3  
F1 – Day zone 1 index to the DMT.  
F2 – Day zone 2 index to the DMT.  
F3 – Day zone 3 index to the DMT.  
F1: A (Added digit stream). 25digits.  
F2: RP (Removal Position). 2digits.  
F3: RN (Removal Number of digits of  
CODE in each table) 2 digits  
F4: AP (Add Position). 2digits.  
F5: CG (CO group). 1digit.  
5
DMT  
(Digit  
00 – 99  
None  
(total:100)  
Modification  
Table)  
F6: ALT(Alternative DMT index).  
2digits.  
99  
 
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM  
TABLE 6.2.2.10 HUNT GROUP/VOICE MAIL PROGRAM (MAIN MENU 11)  
NO SUB MENU FLEX  
KEY  
TERMINAL MENU  
Type  
RANGE  
DEFAULT  
None  
REMARK  
1
Hunt Group  
Program  
1
Cir/Term/UCD  
/VM/Ring/None  
Station No.  
Deletion by  
[SPD] key.  
2
Group Member  
None  
Max 10 stations  
Deletion by  
[SPD] key  
3
Attribute  
None  
15  
Cir/  
Term  
1.No Answer Timer  
2.Ring Timer  
1.First  
0-99  
0-99  
0-99  
1 second  
1 second  
1 second  
60  
15  
UCD  
Announcement  
Timer  
2.Second  
Announcement  
Timer  
0-99  
0-99  
15  
15  
1 second  
3.Announcement  
Repeat Timer  
1.Ring Timer  
2.Put Mail Index  
3.Get Mail Index  
Put Mail  
1 second  
1 second  
VM  
0-99  
1-4  
1-4  
1-2  
99  
1
2
2
VM Dialing  
Table  
1
2
3
4
5
6
7
Prefix : P#  
Suffix : -  
Flex 1 for Prefix,  
2 for Suffix.  
Max 12 digits.  
Deletion by  
[SPD] key  
Get Mail  
Busy  
1-2  
1-2  
1-2  
1-2  
1-2  
-
Prefix : P##  
Suffix : -  
Prefix : P#*3P  
Suffix : -  
No Answer  
Error  
Prefix : P#*4P  
Suffix : -  
Prefix : P#*5P  
Suffix : -  
DND  
Prefix : P#*6P  
Suffix : -  
Disconnect  
*****  
100  
 

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