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User & Programming Manual
DX2000 XL – Hotel Version
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User & Programming Manual
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The information contained herein is proprietary to CORAL TELECOM LTD.
(CORAL) and may not be stored, reproduced, translated, or transmitted in
any form or by any means, in whole or in part, without the prior written
consent of CORAL.
CORAL MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
WITH REGARD TO THIS MATERIAL, INCLUDING BUT NOT LIMITED
TO, DESCRIPTION, QUALITY, MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE, OR ANY OTHER MATTER.
CORAL SHALL NOT BE LIABLE, FOR ANY ERROR OR OMISSION
CONTAINED HEREIN, OR FOR INCIDENTAL OR CONSEQUENTIAL
DAMAGES RESULTING FROM FURNISHING, PERFORMANCE, OR USE,
OF THIS MATERIAL.
CORAL reserves the right to alter equipment specifications and descriptions
contained herein. CORAL makes no commitment to update or keep current
the information herein, and all information herein is subject to change at any
time without notice. No part of this publication shall be deemed to be part of
or imply any contract or commitment whatsoever.

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Notice
The information contained in this document is subject to change without
notice. Coral Telecom Ltd. makes no warranty of any kind with regard to
this material, including, but not limited to, the implied warranties of
merchantability and fitness for a particular purpose.
Coral Telecom Ltd. shall not be liable for errors contained herein or for
incidental or consequential damages in connection with the furnishing,
performance, or use of this material.
No part of this document may be photocopied, reproduced, or translated
to another language without the prior written consent of Coral Telecom
Ltd.
Printing History
First edition : 1st July, 1999
Second edition : 1st Oct, 2000
Third edition : 1st September, 2001
Fourth edition : 1st Oct, 2003

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Index
Introduction..................................................................................................................15
Chapter 1.......................................................................................................................17
Hardware Setup ........................................................................................................................ 17
Technical Specifications.......................................................................................................... 17
Architecture of the system....................................................................................................... 19
Power supply unit (PSU) card................................................................................................. 19
Cards Description.................................................................................................................... 19
How to configure the system................................................................................................... 23
MDF Cable Color Code .......................................................................................................... 24
Setting of CPU DIP switches................................................................................................... 25
How to install the PFCT (Power Fail Cut Through)................................................................ 27
Chapter 2.......................................................................................................................31
Operator Features..................................................................................................................... 31
Internal Call............................................................................................................................. 31
External Call............................................................................................................................ 31
Advice of call charges (AOC) display on key phone............................................................... 32
Attending Incoming Calls........................................................................................................32
Attending Queued Call............................................................................................................ 32
Hold a line............................................................................................................................... 33
Call Transfer............................................................................................................................ 33
Call Consult............................................................................................................................. 35
Brokers Call ............................................................................................................................ 35
Redial ...................................................................................................................................... 35
Call pick-up............................................................................................................................. 36
Connecting a trunk line after dialing ....................................................................................... 37
Auto call back on busy extension / trunk................................................................................. 37
Listening-In............................................................................................................................. 38
Emergency call........................................................................................................................ 38

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Logging-In of auxiliary operator............................................................................................. 39
Conference .............................................................................................................................. 39
`Do not Disturb’ Override.......................................................................................................40
Paging...................................................................................................................................... 41
Voice Paging........................................................................................................................... 41
Background Music ................................................................................................................. 42
Day & Night Mode – Manual Changeover.............................................................................. 43
Auto Redial ............................................................................................................................. 43
Special Trunk Group Access................................................................................................... 44
Printer Form Feed.................................................................................................................... 45
Forceful release of a line ......................................................................................................... 45
Chapter 3.......................................................................................................................47
Some Unique Hotel Features.................................................................................................... 47
Hotel Name Setting ................................................................................................................. 47
Check-In.................................................................................................................................. 48
Check-Out ............................................................................................................................... 48
Entering of the bills................................................................................................................. 49
Guest Message Reminder........................................................................................................ 50
Private Line............................................................................................................................. 51
Room Shifting ......................................................................................................................... 52
Reprint Room Bills.................................................................................................................. 52
Wake up Alarm ....................................................................................................................... 53
Temporary Check-Out.............................................................................................................54
Temporary Check-In ............................................................................................................... 54
Floor Service........................................................................................................................... 55
Room Status ............................................................................................................................ 55
Chapter 4.......................................................................................................................63
Keys on Operator Console........................................................................................................63
Audio Level Adjustment ......................................................................................................... 63
One-Touch Keys...................................................................................................................... 63
DSS (Direct Station Selector).................................................................................................. 63

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Name / Dial Number Display.................................................................................................. 64
On Line Advice of Call Charge............................................................................................... 64
PROG Key............................................................................................................................... 64
CHK-IN (Memo) Key ............................................................................................................. 64
REDIAL Key........................................................................................................................... 64
SPK Key.................................................................................................................................. 65
Room-Shift (TRSF) Key ......................................................................................................... 65
RLS Key.................................................................................................................................. 65
HOLD Key.............................................................................................................................. 65
MSG Key................................................................................................................................. 65
Temp Chk-Out / P-Hold key ................................................................................................... 65
Chk-Out / Conf Key ................................................................................................................ 66
Temp Chk-In / Flash Key........................................................................................................ 66
EMG / ECALL / ALARM key................................................................................................ 66
Chapter 5.......................................................................................................................67
Extension Features.................................................................................................................... 67
Internal Call............................................................................................................................. 67
External Call : (Right Dependent)........................................................................................ 67
Attending Incoming Calls........................................................................................................68
Call Transfer : (Right Dependent)........................................................................................ 68
Call Consult............................................................................................................................. 69
Brokers Call ............................................................................................................................ 70
Redial ...................................................................................................................................... 70
Call pick-up............................................................................................................................. 70
Auto call back on busy extension / trunk................................................................................. 71
Listening-In : (Right Dependent) ......................................................................................... 72
Emergency call (Only from key phone)................................................................................... 72
Enter Own Supervisory Mode................................................................................................. 72
Personal Password................................................................................................................... 73
Dynamic call control ............................................................................................................... 74
Call Forwarding....................................................................................................................... 74
Call forward busy.................................................................................................................... 75

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Do Not Disturb........................................................................................................................ 75
Follow Me............................................................................................................................... 76
Conference .............................................................................................................................. 77
Message................................................................................................................................... 77
Paging...................................................................................................................................... 78
Voice Paging........................................................................................................................... 78
Background Music ................................................................................................................. 79
Auto Redial ............................................................................................................................. 80
Special Trunk Group Access................................................................................................... 81
Private Line............................................................................................................................. 81
Boss Secretary System............................................................................................................. 82
Auto Lift & Auto Drop............................................................................................................ 82
Set Self Alarm......................................................................................................................... 83
Floor Service........................................................................................................................... 84
Chapter 6.......................................................................................................................85
System Programming................................................................................................................ 85
Factory Reset........................................................................................................................... 86
Set System Time...................................................................................................................... 86
Set System Date....................................................................................................................... 86
How to reset the RTC.............................................................................................................. 87
Setting Main Operator/Aux Operator...................................................................................... 87
Setting of DSS Extension........................................................................................................87
Allocate DSS To KTS.............................................................................................................89
Set KTS Flexible Keys............................................................................................................ 89
Set DSS Keys .......................................................................................................................... 90
Set Flexible Numbering Plan................................................................................................... 90
Print System Flexible Numbering Plan.................................................................................... 91
Bulk Range Programming ....................................................................................................... 91
Enable / Disable a Line ........................................................................................................... 91
Trunk Dialing Type................................................................................................................. 92
Set Trunk Metering Type ........................................................................................................ 92
Time Base & Delayed Dialing Time....................................................................................... 92

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Incoming Trunk Landing Type................................................................................................ 93
One Termination Ext For Trunk.............................................................................................. 94
DISA Messages Recording...................................................................................................... 94
Setting of `DISA ANSWER PORT’........................................................................................ 94
Feature Locking....................................................................................................................... 95
Room / Service Phone............................................................................................................. 95
Call Transfer Rights ................................................................................................................ 96
Setting of Floor Service for Room ......................................................................................... 96
Gate Phone.............................................................................................................................. 96
Paging Rights .......................................................................................................................... 97
Listening-In............................................................................................................................. 97
Call Disconnection For Extension........................................................................................... 97
Call Disconnection / Warning Tone Time............................................................................... 98
Call Duration Warning Tone................................................................................................... 98
Reset extension password........................................................................................................99
Setting of Boss Line ................................................................................................................ 99
Set secretary line ..................................................................................................................... 99
Second Trunk Pick-Up Rights................................................................................................. 100
Dialing rights of an extension.................................................................................................. 100
Single / Two Digit Restriction................................................................................................. 100
Set Extension Name ................................................................................................................ 101
Enable System Budgeting........................................................................................................ 102
Extension-wise Call Budgeting ............................................................................................... 102
Call Budgeting Amount........................................................................................................... 102
Advice of call charges display on key phone........................................................................... 103
Call Forward Busy................................................................................................................... 103
Set / Reset Check-Out Bill Fields............................................................................................ 103
`Don’t disturb’ Mode Setting for Checked-Out Room............................................................ 104
CLI on Analog Trunks............................................................................................................. 104
Setting of CLIP Timer for detecting CLI................................................................................. 104
Trunk CLI Extending while transferring a trunk call............................................................... 104
CLI on SLT ............................................................................................................................. 105
Trunk & extension grouping for CO access ............................................................................ 105
Auto Redial Trials & Time Interval Between Two Trials....................................................... 106

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Auto redial class for trunk....................................................................................................... 107
Set special group for trunks..................................................................................................... 107
Set Flash Time of System........................................................................................................ 108
Change System Password........................................................................................................ 108
Auto Change Over Timings..................................................................................................... 108
Manual Day / Night Mode Setting........................................................................................... 109
Set Night Code........................................................................................................................ 109
Length of the local Tele number for printing........................................................................... 109
Host computer interface .......................................................................................................... 110
Host Always Ready................................................................................................................. 110
Malicious call Trace................................................................................................................ 111
Chapter 7.......................................................................................................................113
Cost Table & Code Table ......................................................................................................... 113
Chapter 8.......................................................................................................................121
Remote Programming............................................................................................................... 121
Chapter 9.......................................................................................................................123
ASMDR Reports........................................................................................................................ 123
Call Buffer Management in DX for Hotel Version.................................................................. 123
Set System SMDR Recording Level ....................................................................................... 124
Call details printing from System Buffer................................................................................. 124
ASMDR Printing..................................................................................................................... 125
Today’s Calls Printing............................................................................................................. 126
Erasing of ASMDR of Specific Extension.............................................................................. 127
Special Selected Printout......................................................................................................... 128
Clarification of the SUFFIX that gets printed with the calls during ASMDR printing............ 129
Diversion of printer port to serial port..................................................................................... 129
Check-Out Bill ........................................................................................................................ 130

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Chapter 10.....................................................................................................................131
Voice Guidance Services........................................................................................................... 131
Chapter 11.....................................................................................................................133
Quick Reference for Activation of Hotel Features................................................................. 133
Chapter 12.....................................................................................................................135
Quick Reference of User Features ........................................................................................... 135
Chapter 13.....................................................................................................................137
Quick reference of System Programming (For engineers).................................................. 137
Chapter 14.....................................................................................................................141
Abbreviations............................................................................................................................. 141

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Introduction
Welcome to CORAL systems and its associated Key Telephone Sets. Much thought has gone into
making this system flexible and easy to use.
The key sets will become an invaluable part of your work environment, providing you with an
important tool for your daily communication activities. Although the key sets are very advanced
instruments, their use is very simple and straightforward. By using features important for you and
your company, your key sets will provide you with immediate communication power.
Many of the features, which have been assigned during initial installation, are programmable on an
individual extension basis. Feature allocation may also be changed to suit a changing working
environment or adapted to your individual requirements by allowing you to program certain keys on
your telephone. Should you need to change a key function, this can be done by system programming
only. Most of the key set features can be activated by either pressing the programmed key or by
dialing the feature access code.
This user guide provides a full description of the capabilities and operation of the key telephone set.
This guide is organized alphabetically. The table of contents also doubles up as an index to the
various features that the system supports for the key telephone sets. Use of this guide is
straightforward with each feature listed separately. Certain features have various user options, in
such cases, all of the options are listed under the major feature name.
Not every feature in this guide is likely to have been installed in your system or extension.
Check with your system manager for a list of features actually installed.

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Chapter 1
Hardware Setup
Technical Specifications
System Capacity & Resources
Model Max Ports Blocking / Non Blocking
DX Small 40 Ports Non Blocking
DX Medium 72 Ports Non Blocking
DX Large 120 Ports Non Blocking
Power Consumption
Model
Power Supply Inpu
t
Power Supply Output Max Power
DX Small 220VAC/50 Hz 24 Vdc / Ringer 75Vac 20 Hz / 48 Vdc
optional 60 Watt
DX2000
Medium 220VAC/50 Hz 24 Vdc / Ringer 75Vac 20 Hz / 48 Vdc optional 92 Watt
DX Large 220VAC/50 Hz 24 Vdc / Ringer 75Vac 20 Hz / 48 Vdc
optional 140 Watt
Type of Switching : TDM / PCM
Type of Control : SPC
Extension Dialing
a. Pulse Dialing : 10 PPS +/- 10 %, Make Break = 1:2, IDP 60ms
b. DTMF Dialing : As per CCITT recommendation Q.23

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Trunk Dialing
a. Pulse Dialing : 10 PPS +/- 10 %, Make Break = 1:2, IDP 60ms
b. DTMF Dialing : As per CCITT recommendation Q.23
Tones
a. System Dial Tone : 500 Hz Continuous
b. Ring Back Tone : 500 Hz
c. Busy Tone : 500 Hz , .5 sec On & .5 sec off
Ringers
a. Internal Call : 1000 ms / 3000ms / 1000ms / 3000ms
b. External Call : 500ms / 100ms / 500ms / 1500ms
c. Alarm Call : 300ms / 500ms / 300ms / 500ms
Transmission Parameters
a. Return Loss : More than 18 db
b. Insertion Loss : Less than 1 db
c. Inter-Channel Cross Talk : Less than –65 dbm
d. Idle Channel Noise : Less than –60 dbm
e. Extension Loop resistance : 800 Ohm (excluding telephone instrument)
f. Key phone loop resistance : 180 Ohm.
Cabling : 0.5 mm Single Twisted Pair.
Environment
a. Temperature : -5 Deg to 55 Degree
b. Humidity : 95 % RH, Non-Condensing

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Architecture of the system
The system is designed using advanced CMOS chips to ensure optimum processor speed and
minimum power utilization. It is a micro controller based system with distributed processing.
Each card in the system has a PTC (Positive Temperature Co-efficient) to ensure protection
to the cards and also to act as an auto resettable fuse. Each card in the system is provided
with SMPS to convert 24 volts DC into its own operating and logic voltages. The system has
a combination of active and passive bus to ensure reliable communication between the cards.
For e.g. if one card fails, it does not affect the performance of other cards. The architecture
of the system is as under:
Range
Module DX2000 Small - 40 Ports
Module DX2000 Medium - 72 Ports
Module DX2000 Large - 120 Ports
Power supply unit (PSU) card
It has distributed power management to ensure minimal load on the PSU. It has an SMPS
design and ensures constant current charging to the batteries connected to the system. It
converts 230 volts AC into various operating voltages.
a. 24 volts DC for power supply to all cards & for line voltage.
b. 60 volts AC, 20 Hz. for ringer voltage for analog telephones.
c. 28 Volt for Battery Charging.
d. +48 Volt DC for Line Voltage (Optional).
Important: It is found that all the DTMF CLI instruments which are available in the market,
does not support the CLI facility if the line voltage is 24 Volt DC. So if CLI on SLT is
required, ensure that the system is configured with a power supply that supports 48 Volt line
voltage.
Cards Description
CPU Card
There are 2 types of CPU cards supported on DX2000 series:
a. CCPU - For maximum 120 Ports
b. SL CPU - For Maximum 504 Ports
CPU controls the complete functioning of the system. CCPU is an Intel 89C51 @ 12 MHz.
micro controller based system. It has 128 KB RAM and 128 KB ROM for systems below
120 lines. XL CPU uses Intel 89C52 micro controller which runs @ 20 MHz.

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CCPU has its own power supply that takes in 24 volt DC from the main power supply of the
system & generates its own operating voltage +5 & -% volt.
CCPU contains digital switching matrix. It has its own RTC to maintain the system time.
The CCPU & XL CPU has one serial port & one parallel port. Serial port is used to integrate
the DX with computer for any CTI application (Refer DX CTI Manual) It also has a built-in
printer interface to connect a printer for generating reports of calls made from the PBX.
CCPU has tone card functionalities like DTMF dialer, external & internal hold on music,
paging port.
Tone Card
SL CPU requires external Tone card to support them for system working. It generates its own
+5 volts for its functionality from 28 volts DC that is available from the main PSU. The
Tone cad contains:
a) 3 sensors
b) 1 action ports
c) 2 paging ports
d) 1 external music port
e) Single DTMF dialer
Peripheral Cards
Digital Line Cards (DLC)
It is used to connect digital key phones and DSS instruments. Key phone & DSS are
connected to separate ports of the DLC card but can be configured to operate as one operator
console.
It does not occupy any fixed position in the system and can be put in any slot except the PSU,
CPU and the Tone card slot. This card has its own Intel 89C51 micro controller, which
minimizes the load on master CPU. The DLC are high-speed data transreceivers that provide
80 KBPS full duplex data communication over 26 AWG (American Wire Gauge-an unit of
thickness of wire) or thicker twisted pair upto 1000 meters. The DLC utilizes a 256 kilo baud
modified differential phase shift keying burst modulation technique for transmission to
minimize cross talk in ping pong protocol and also to provide noise immunity to Data and
Voice. It provides for full duplex synchronous 64 KBPS Voice/Data channel and two 8
KBPS signaling data channels over one 26 AWG wire pair, thus simultaneous power
distribution and duplex data communication can be obtained using a single twisted pair wire