User's Manual
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM     
5
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 
.........................................................................................................13
2.4 System Components 
...........................................................................................................15 
SECTION 3. INSTALLATION
.........................................................................19
3.1 Introduction 
.............................................................................................................................19
3.2 Site Preparation 
....................................................................................................................19
3.3    KSU & POWER Installation 
...............................................................................................21
3.4 PCB Installation 
.....................................................................................................................24
3.5 System Wiring 
.......................................................................................................................33 
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










