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User Programming Manual
DX2000 XL – Hotel Version 2

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.

This page is intentionally left blank

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

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

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

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

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

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

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

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

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.

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 Input 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

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

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.

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

Line Card (LCS)
CPU and the Tone card slot. This card has its own Intel 89C51 micro controller, which
minimizes load on master CPU. It can connect a maximum of 8 analog instruments per card.
It has unique power-down circuit, which means if the instrument is on hook, the circuit does
not draw power. This is useful during power failure when the battery takes over, thereby
increasing the duration of battery operations. It has AGC (Automatic Gain Control), which is
useful during long distance calls, when the quality of voice goes down. The AGC increases
or decreases the gain to maintain a standard voice level. It has an internal 4 wire design to
avoid echo. LCS cards have feature of RF suppression support loop resistance of 2400
ohms on 48volts line voltage.
LCS is of three types:
a. LCS-I This card is used to provide the connectivity of SLTs. It will extend DTMF CLI
on normal SLT extension provided CLI is supported on trunk port DTD card is
installed. Extension should have a CLI instrument.
b. LLC-II This card will offer the LCS-1 facilities message waiting facility on
extension. Message waiting lamp facility can be provided only with SL CPU. However
LCS-II can work as LCS-1 with CCPU.
c. LLC-III This card will offer the facilities of LCS-2 additionally line reversal
extending on SLT. This card will extend the reversal with SL CPU with CCPU also
(only on Hotel version)
Note- It is found that some CLI instruments are not supporting the CLI facility if the line
voltage is 24 Volt. Hence care must be taken while installing the system.
Analog Trunk Card (TCS)
the CPU and the Tone card slot. This card has its own Intel 89C52 micro controller, which
minimizes load on the master CPU. It can connect a maximum of 8 P T lines per card. It
has AGC (Automatic Gain Control), which is useful during long distance calls, when the
quality of voice goes down. The AGC increases or decreases the gain to maintain a standard
voice level.
Trunk ports will detect the reversal DTMF CLI from the analog trunks. The feature `Call
progress tone detector – CPTD’ also is the part of the TCS card. 16 Khz detection also is
possible only with SL CPU.

ATD Card
This card is the combination card of DLC TCS. Upper 4 ports are the digital ports lower
4 ports are trunk ports. ATD card also senses the DTMF CLI, line reversal CPTD. This
card can be plugged-in in any of the slot except PSU,CPU Tone.
DTD Card
This is the combination card of DLC / TCS DTMF dialers. This card has 2 digital ports , 4
trunk ports 2 DTMF dialers. DTMF dialer is used to provide the DTMF CLI on SLT. This
card also has no fixed position.
VSN2 Card
the CPU and the Tone card slot. This card has its own Intel 89C52 micro controller, which
minimizes load on the master CPU. Each card has 2 VSN ports and the system can have a
maximum of 1 VSN DISA cards.
There are 7 levels of DISA voice services offered wherein the system VSN picks up the call,
greets the caller and guide him for the required usage. The levels are as under:
Level 1 - Operator message ( 9 seconds)
Level 2 - Night message after office hours ( 9 seconds)
Level 3 - Successful storing of numeric message (5 seconds)
Level 4 - Welcome message (9 seconds)
Level 5 - Extension busy message (9 seconds)
Level 6 - Invalid number dialed message ( 9 seconds)
Level 7 - No answer from extension message (9 seconds)
Thus any of the above messages can be used during DISA.
Conference Card
This card is used to establish the 8 party conference. It must be noted that for 3 party
conference, no additional card is required but for 8 party conference, conference card is
mandatory. This card also has no fixed position. One system can have only one conference
card.

Key phones
It has its own Intel 87C51 micro controller, which minimizes load on the master CPU and is
powered by the DLC card.
DSS instrument
It has its own Intel 87C51 micro controller, which minimizes load on the master CPU and is
powered by the DLC card. It generates its own 5 volts. It has a maximum of 120 keys,
which are programmable and can assign a key for direct access of trunk line, extension line or
global memory bank in any combination. It has to operate in conjunction with a digital
phone. One DSS occupies one digital port.
How to configure the system
It is important to configure the system correctly as certain features would require specialized
CPU or operate with in conjunction with another hardware. To configure a system, one must
find out the requirement of the following:
a) Number of operator key phones DSS
b) Total number of digital subscribers.
c) Total Number of analog subscribers.
d) Total number is analog trunk lines.
e) Voice Guidance
f) CLI on SLT.
g) 8 party conference.
Initially it may be desirable to use our computer-associated software “Configurator” to
configure a system for use of by a customer. It is sometimes critical as some features require
use of additional cards.
Once the exact number of cards, required by the customer, are decided along with his future
upgradation needs then the appropriate module must be decided on the following basis.
Module DX2000 Small - 40 Ports
Module DX2000 Medium - 72 Ports
Module DX2000 Large - 120 Ports
If CCPU is used, tone slot of the small medium modules can be converted into peripheral
slots as CCPU has inbuilt tone card. So to configure the tone slot into peripheral slot, there
are some jumpers on the motherboard between CPU Tone slot. With small module,
jumpers are JP1 , JP2 JP3. With medium module, jumpers are JP1 / JP2 / JP3 / JP4 / JP5 /
JP6.

For small module, jumper setting will be as follows –
JP1 - Short 1 2 for tone slot 2 3 for peripheral slot. Its lower pin is pin no. 1.
JP2 - Short 1 2 for tone slot 2 3 for peripheral slot. Its upper pin is pin no. 1.
JP3 - Short 1 2 for tone slot 2 3 for peripheral slot. Its upper pin is pin no. 1.
For medium module, configure these jumper setting as follows –
JP1 – This is 3 pin jumper. Short 1 2 for Tone Card short 2 3 for peripheral slot. Its
lower pin is the pin no. 1
JP2 - This is 3 pin jumper. Short 1 2 for Tone Card short 2 3 for peripheral slot. Its
upper pin is pin no. 1.
JP3 - This is 2 pin jumper. Short it for Tone open for peripheral slot.
JP4 - This is 2 pin jumper. Open it for Tone short for peripheral slot.
JP5 - This is 2 pin jumper. Short it for Tone open for peripheral slot.
JP6 - This is 2 pin jumper. Open it for Tone short for peripheral slot. Its upper pin is pin
no. 1
Now plug-in all the cards. In order to minimize the load on the CPU, one type of the cards
(trunks or extensions) should be placed together. For example, all the digital line cards should
be placed together. All the trunks should be placed together.
Once all the cards are plugged-in into the system, prepare the MDF. MDF cables are provided
with the system that will be laid between DX the MDF. The color-coding of the cables is
as follows -
MDF Cable Color Code
Port 1 Red Orange
Port 2 Red Blue
Port 3 Red Green
Port 4 White Brown
Port 5 White Grey
Port 6 White Orange
Port 7 White Blue
Port 8 White Green

Setting of CPU DIP switches
DIP Switch is a small switch placed on the CPU of the system and contains four switches
embedded on to it which are referred to as SW1-1 / SW1-2 / SW1-3 / SW1-4.
There are two positions on the DIP switch (ON and OFF). The various functioning of the DIP
switch se are explained as below -
Compact CPU (CCPU)
The compact CPU got SW1 for selecting the type of system functionality required i.e. Office
version or hotel version.
Switch No. Position OFF Position ON
SW-1. Office Hotel
SW-2 System parameter initialize Normal position after
programming
SW-3 Line parameter initialize Normal position after
programming
SW-4 System initialize new programming
not allowed
Loads already created card table
allows new programming.
SW1-2 SW1-3 become effective only if the SW1-4 is in OFF position i.e. if system
initialization is allowed. If SW1-4 is in ON position, SW1-2 SW1-3 will not be
operational.
If SW1-4 SW1-2 are off, system parameters will be initialized if CPU is reset or if it
switched off on. System parameters, such as Restricted dialing, Hotel Name, Bill Serial
No., Billing Details, STD/ISD Zones, Call rates, Master password, RTC time, sharing rights,
VRR, night node announcement, call budgeting, Change-over timings, half rate, HMS
interface, etc. , will be set to default mode i.e. factory setting.
If SW1-3 SW1-4 are off if CPU is given a reset or if system is switched off on, line
parameters (ext. trunk parameters) will be initialized would be set to default factory
setting.
SW1-4 is for resetting the system configuration. If SW1-4 is in OFF position on giving a
reset to the CPU, it checks all the slots for the cards available in various slots refreshes the
card table but it may leave system parameters unaffected if SW1-2 is ON position provided
existing system structure is not changed i.e. new cards are inserted at the end.

Similarly if SW1-3 is in ON position then line parameters may remain unaffected provided
system structure is not changed.
DIP Switch Setting while installing the system initially
While installing the system, put SW1-1 as per the installation type i.e. Office or Hotel
version.
Install all the cards in various slots. Put SW1-2 / SW1-3 / SW-14 in OFF condition. On
switching-on the system, as all three switches are in OFF position so system will create a new
card table the content of the RAM also will be refreshed i.e. system will completely reset
itself to factory setting.
Once initialization is complete, the RUN LEDs on each card will start blinking i.e. RUN
MODE. Now SW1-2 / SW1-3 / SW1-4 should be put in ON position. System programming
can be done only if SW1-4 is kept in ON position. If SW1-4 is kept in OFF position, system
will show `Locked’ during system programming. Do not put the SW1-4 in OFF position
after programming the system. If it is kept in OFF position system is switched off or the
reset switch of CPU is pressed, programming will be erased.

How to install the PFCT (Power Fail Cut Through)
With the installation of Power Fail Cut Through (PFCT) circuits, trunk lines may be directed
to station sets (SLT) in the event power is interrupted to the Coral system. This arrangement,
referred to as power failure transfer, completely bypasses the system, allowing specific
stations to originate outgoing calls and / or continue answering incoming calls. One PFCT
card can support a maximum of 8 trunk lines.
Physical Connection
An analog extension can be made as the Power fail Cut Through port. The layout of the
PFCT circuit is given below:
To PSTN N/W
To Line Card
JP4_1 JP4_2 JP4_3 JP4_4 JP4_5 JP4_6 JP4_7 JP4_8
JP3
24 Vdc RY1 RY2 RY3 RY4 RY5 RY6 RY7 RY8
To Subscriber Side
To Trunk Card
Layout of PFCT

The PFCT card has a 3 Pin Power connector, which has to be connected to the motherboard
of the DX system. This is to bring the power to the PFCT card from the DX. One cable is
provided along with the PFCT for feeding the power from DX to PFCT.
JP4 is for connecting the output of the line card. JP4_1 to JP_8 are for connecting 8 ports of
the line card.
JP3 is for connecting the CO lines that are coming from PSTN network. JP3_1 to JP3_8 are
for connecting 8 trunks.
JP2 is for connecting to the trunk ports of the DX. JP2_1 to JP_8 are for connecting 8 trunk
ports of DX.
JP1 is for connecting the subscriber side. JP1_1 to JP1_8 are for connecting 8 desired
subscribers.
Every port is having one relay that changeover the connections between various points as
explained below.
How the PFCT Module works:
In the event of no power, relay of the PFCT port will be switched off so JP3 will be short
circuited with JP2 JP1. As a result, trunk line coming from PSTN will be available at
trunk port of the DX as well as the connected subscriber’s instrument.
From Line card of DX
Trunk line from
PSTN N/W
To Trunk card
To Subscriber Side
Working of PFCT in the event of no power
JP4
JP3
JP2
JP1

The moment, power is fed to the PFCT, relay of all the PFCT ports will be switched-on. In
this scenario, JP3 JP2 will remain short circuited while JP1 gets isolated from JP2 JP3
JP1 gets connected with JP4. Means subscriber will get connected to the line card he
will get disconnected from the trunk.
From Line card of DX
Trunk line from
PSTN N/W
To Trunk card
To Subscriber Side
Working of powered PFCT
Example: Let us explain the connections for only one port.
For example, trunk which is connected to first trunk port, should be connected to analog
extension no. 208 So for the same, follow the steps -
JP1_1 must be connected to the field side of the extension 208.
JP2 must be connected to the trunk port.
JP3 must be connected to the trunk, which is coming from PSTN.
JP4 must be connected to the extension number 208 of the line card.
Now when power is not there, JP1 is shorted with JP2 JP3. Means trunk is connected to
the instrument as well as trunk card. The moment, power is up, JP1 will be isolated with JP2
it will be connected to the JP4 rest will be as it is. Means now instrument will be isolated
from trunk it will be connected to the extension port.
Note: A key phone cannot be used as the destination of the trunk in the event of power fail.
JP4
JP3
JP2
JP1

Chapter 2
Operator Features
Internal Call
An extension user can make an internal call to any extension in the system by the following
method:
Step Action You Get
1. Lift the handset. Dial tone.
2.
Dialed the desired extension number or press
the predefined key on key phone.
Ring back tone till the called
party picks up the phone.
Note: In case of the called extension is busy, use call back facility.
External Call
You can make an external call through any of the trunk lines connected to the system.
To make an external call:
Step Action You Get
2.
Dial trunk access code (0, or any other number
programmed for the purpose.
Trunk Dial tone.
3. Dial the Number. Ring Back tone/Busy tone.
The default trunk access codes are 0, which selects any free trunk line. To select specific
trunk lines the default codes are 700,701,702…...

Advice of call charges (AOC) display on key phone
While making the outgoing call, KTS shows the advice of call charges (AOC). This advice of
call. Charges are calculated as per the Cost Code Table of the system. Display of AOC on
KTS can be enabled or disabled as desired by the user. (Refer system programming).
Attending Incoming Calls
Operator can attend both incoming internal and external calls. Once a call is ringing on
operator key phone, it will start ringing.
Step Action You Get
1. Lift the handset. Start Conversation.
Attending Queued Call
This feature enables the operator to handle more than one incoming call. If operator is busy
with a call and a second trunk call lands on operator key phone, operator key phone will ring
will stop. than audio ring will stop. This is an audio intimation for the operator of the
queued call. Operator can pick up the queued call by either of the two ways given below:
To pick up queued call:
Step. Action What happens
1. Disconnect the current call by pressing the RLS key.
Queued call will be
picked up automatically.
Or
Step Action What happens
1.
Put the current call on hold by pressing the PHOLD
key .
Queued call will be
picked up automatically.
2. After the conversation, hang up.
3.
Pick up the held call by pressing the corresponding
trunk key, which was put on hold earlier.
You will get the held call
back.

It is advised to release each call by pressing the RLS key rather than by replacing the handset
on the cradle so that all the queued calls can be attended one by one.
Hold a line
A conversing party (extension or trunk) can be put on hold by the following procedure for
onward activities such as call consult, call transfer.
To place a call on hold:
Step Action You Get
1. Press the HOLD Key for onward activity. Confirmation tone.
2. Press P-HOLD key.
You will be released carry
out any other activity.
The calling or the called party would be placed on hold and will hear the hold on music.
To return to a call put on hold:
Step Action You Get
1. If a line is put on PHOLD, that can be taken
back by pressing the corresponding key on key
phone or dialing the access code for the line.
Connected back to the party,
which was put on Hold.
2. If a line is put on hold temperarorily by pressing
the HOLD key, that line can be taken back by
pressing the HOLD key again.
Held line will be connected
back.
Call Transfer
Any internal or external call received / originated at operator can be transferred from that key
phone to other extension. The call can be transferred after screening or without screening.

To transfer a call
Step Action You get
1. While talking, press the HOLD key. Wait for the confirmation tone
2.
Dial the extension number or predefined key of
the desired extension.
Hear the ring back tone.
3.
If you find the called extension busy, press the
HOLD key again for taking the line back.
You will get back the held
call.
4.
If during transferring a call, am invalid
extension number is dialed dialed by mistake,
press the HOLD key again.
You will get back the held call
you can try again.
At this level you can either screen or connect straight away
Screened Transfer:
Step Action What Happens
1.
While hearing the ring back tone, wait for the
answer.
You get the ring back tone.
2
If you get an answer from the dialed extension,
inform about the incoming call press the RLS
key.
Call will be transferred both
the parties will be connected.
3.
If none is answering the call, you can take back
the trunk call back by pressing the HOLD key
again.
You will get back the call.
Unscreened Transfer :
1.
While hearing the ring back tone during
transferring a call, press the RLS key or Hang
up.
Called extension will start
ringing.
During an unscreened transfer, if there is no answer from the destination extension, the call
will come back to the extension that transferred the call. If at such a time, calling extension is
busy, the call will be diverted to the operator.

Call Consult
This feature allows you to consult a third party while conversing with an external or internal
caller. During consultation call, other party will be put on hold and will get hold on music.
Step Action You Get
1.
While talking to a party, press the
HOLD key.
Confirmation tone.
2.
Dial the second party number
(Extension or trunk).
Talk with the second party.
3.
If the second party disconnects. You will get connected to the first
party.
4.
Or you can make toggle between first
second party by pressing the HOLD
key alternatively.
You alternatively get connected to the
other party and the currently connected
party goes on HOLD.
Brokers Call
This feature allows you to put a call on hold and then converse with a third party, while
switching between the two calls. The party not in conversation is automatically put on hold.
To activate the broker’s call:
Step Action Remarks
1. Press the HOLD Key + Dial the new number. Wait for an answer.
2.
When both the parties are connected Press
HOLD to alternate between the two parties.
Toggling between both the
parties will be there.
Redial
Operator can repeatedly dial the last number dialed on the trunk, without pressing all the
numbers again. For this follow the procedure below:

To make the redial
Step Action You get
2. Press the RDL key.
The last dialed external number will
be redialed automatically.
If external number is dialed by accessing any free trunk by dialing the trunk access code
(default `0’) then on redial also any free trunk would be selected but if external number was
dialed by selecting any specific trunk, then redial would be attempted on the same trunk only.
Call pick-up
This feature allows you to answer other ringing extensions within the system. There are two
types of call pickup one is `Call pick within service extensions’ another is `pick any
ringing extension’.
To pick up the call within service phones:
Step Action You Get
2. Dial `Call Pick Up code’ (Default `88’) Connected to the calling party.
Note that you can pick an incoming call within service extensions (Not room extensions).
Room service extensions will be defined through system programming.
Important : If several extensions in the group are ringing then the call pick up would be n
following order:
i) Ringing trunk ii) Ringing Ext iii) Queued trunk line to an ext. (not operator)
To pick any ringing extension:
Step Action You Get
2.
Dial the selective call pick up code (default 54)
+ ‘ringing extension no.’.
Connected to the calling party.

Connecting a trunk line after dialing
This feature is used when an extension user wants an external number to be dialed by the
operator. After the extension user has given the external number, press the hold key to put
him on Hold-On music. Then select a trunk line by pressing the trunk key or by dialing “0”
and dial the required external number. After dialing, wait for the ring back tone then press
RLS key to connect the trunk line to the extension.
Step Action You Get
1.
While talking to an extension, press
HOLD key.
Confirmation tone.
2.
Select a trunk dial external number
press RLS key.
Extension will be connected to the
trunk you will be released.
Auto call back on busy extension / trunk
If the called extension or trunk is found busy, this feature automatically connects as soon as
the called line is free. If the call back is for an extension, your key phone will ring as soon as
the called extension becomes free. Simultaneously, the called extension will also ring. If the
call back is for a trunk line, the trunk will be allotted to your key phone as soon as it becomes
free and your extension will ring. On lifting your handset, you will get the trunk dial tone.
To activate Call back on a busy line:
Step Action You Get
1.
Dial the extension number or the PSTN
selection code.
If called extension or trunk is
busy, you get busy tone.
2.
On getting busy tone, dial the `Auto Call Back
Code’ (default 8).
Confirmation tone.
3. Hang up.
Now as soon as busy extension or trunk gets free, your key phone will start ringing.

Listening-In
This feature enables the operator to monitor any extension or trunk line without an audio
warning to the monitored party. Listening in can be activated while attempting to call a busy
extension or trunk line.
To activate listen in on a busy extension or trunk line:
Step Action You Get
2. Dial the busy extension or trunk no. Busy tone.
3. Dial the listen-in code (default `6’). Voice of the calling parties.
4. Press RLS key. Listening-in will be terminated.
Note: When a port is protected against listening in by activation of the Privacy
feature, you will get busy tone.
Emergency call
This feature allows the operator to break into an established two party call. It can be used for
conveying any emergency message for an internal party. On activating emergency call on an
extension, the party who was conversing with this extension, will automatically go on hold
and he will hear hold on music.
To activate an emergency call
1.
On getting the busy tone while calling an
extension, press EMG key.
Connected to the called
extension.
2.
Announce the message hang up for
terminating the emergency call.
Conversation between original
parties will be re-established.

Logging-In of auxiliary operator
The auxiliary operator has to be set in the system programming. A maximum of 3 extensions
can be set as auxiliary console i.e. AUX1, AUX2, AUX3. These auxiliary operators can be
enabled (login) or disabled (logout).
For logging-out:
Step Action You Get
1. Lift the handset. System dial tone.
2. Dial the logout code (Default is ‘85’) Confirmation tone.
3. Press RLS / hang up.
For logging-in:
Step Action You Get
2.
Dial the code to get into supervisory mode (i.e.
55) followed by your extension’s pass code.
You have entered into own
supervisory mode.
3. Enter your ext password followed by `7’. Confirmation Tone.
4. Press RLS / Hang up.
Note: Only the AUX operator can be logged in or logged out. After logging out,
only that aux operator will cease to work as an auxiliary operator. The main operator
cannot be logged in or out. By default all the AUX operator are logging-in.
Conference
This feature allows the operator to have a conference call with maximum of two parties
either internal or external. This conference is known as 3 party conference.

3 party conference:
Step Action You Get
1.
Lift the handset and dial an internal or external
number.
Conversation established with
the called party.
2.
Press HOLD to put first party on hold and dial
another extension number or select a trunk
make external call.
Second call is initiated.
3.
While talking to second party (internal or
external), press CONF key.
3 party conference will be
established.
4.
Press RLS key . 3 party conference will be
terminated.
Note: For having a 3 party conference with two trunk lines and your extension,
you must have the right to pick the second trunk while putting the first trunk on hold.
This right is given by system programming.
`Do not Disturb’ Override
If an extension user has activated `Don’t Disturb i.e. DND feature at his extension, operator
can access that DND extension also (in case of emergency) means Operator can override any
extension that is set in DND mode.
To override any DND extension
1. Dial the extension number Display will show `DND’.
2. Press the EMG key.
That extension will start to
ring.
Note : This feature does not cancel the DND on the called extension.

Paging
The system has a provision to interface with a public address system. You can have direct
access to the public address system by dialing a two-digit code to make announcements. One
number paging port is available with CCPU card.
To Page:
Step Action You Get
1. Lift the handset. Dial tone
2. Dial the access code of the paging. (default `80’). Confirmation tone
3. Announce the message.
4. Press RLS key or hang up.
Note: CCPU has single paging port.This feature requires additional amplifier
speakers.
Voice Paging
This feature can be used by the operator for activating a key phone remotely. The operator
can activate the speakerphone of the called key phone start the conversation. The
speakerphone gets disconnected as soon as the operator disconnects. In case the operator
does not get a reply on activating the speakerphone, because of the absence of the user, then
operator can revert back to the ringing mode in order to draw the users attention if he is
nearby.
To activate the speakerphone when dialing a key phone extension:
Step Action You get
2. Dial the extension number. Ring back tone.
3. Dial code for speakerphone activation (default is ‘2’). Start conversation.

To revert back to ringing mode:
1
On activating the called key phone, if no answer
is found, dial the code for reverting back to
ringing mode. (default code is ‘1’).
Called extension start ringing
again.
Note : Operator cannot be activated using this feature.
Background Music
This feature enables you to listen the background music , which is connected to your system.
The background music will be played by the speaker of the operator key telephone set.
The background music source can be a CD player or any other music player, which can be
connected to the external music point on the CCPU card. Once background music is
activated, external music will be played on the speaker of your key phone. When an incoming
call (both internal and external) lands on your extension, the background music will be
stopped your key phone will ring. After the conversation, when you replace the handset,
the music will continue.
To listen to background music
Step Action You Get
2.
Dial the access code for back ground music
(default code is ‘82’).
Listen to the music.
3. Press RLS key.
To cancel background music
Step Action You Get
1. Lift the Handset. Dial tone.

2.
Dial the access code again for canceling back
ground music (default code is ‘82’).
3. Press RLS key. Music will be stopped.
Day Night Mode – Manual Changeover
The status feature of extensions and the trunk lines can be changed with the switchover
from the Day Mode to the Night Mode. The system is pre-set for auto Day Night mode
changeover at the timings prescribed by the customer. User can facilitate a manual
changeover and override the auto day-night mode. A manual setting if left unchanged, will be
automatically overridden at these auto changeover timings and the system comes back to the
auto mode thereafter.
The manual setting is done as follows:
Step Action You Get
2.
Dial the access code of the D/N changeover
(default is 499) + ZZ + M.
Confirmation tone.
3. Press RLS key or hang up.
Where ZZ is the night code by default it is 99 however it can be changed through system
programming. M = 1 for Day Mode 0 for Night Mode.
Note: Auto day night mode timings can be defined through system programming.
Auto Redial
This feature can be used to put an external number in auto redial mode. The system will
automatically dial this number at a predefined interval of time and on getting a ring back tone
from the trunk side, connects the line to you and your key telephone display will show the
telephone number connected to you. If at the time of transfer, your extension is busy, the
external party will be put on Hold On music.

Note: Auto redial works on CPTD (Call Progress Tone detector) basis. If call progress tones
are working at correct frequency gain on your trunk lines than only this feature will work.
To put a number in auto redial:
Step Action You Get
1. Press HOLD followed by RDL key from key phone. Confirmation tone.
Note: The number of time which the system dials your number in auto redial mode and the
time interval between two consecutive tries have to be defined in the system Programming.
You can put more than one number in auto redial mode. The status of each number put in
auto redial can be viewed by pressing the MSG key.The display will show the telephone
number put on auto redial and the number of tries left for this number. For viewing the status
of the next number in auto redial, press MSG key again. To cancel any number put in auto
redial, press FLASH key while viewing the status of the number.
To cancel auto redial number in progress:
Step Action You Get
2.
Press MSG key followed by FLASH key when
that specific number is on display.
Auto Redial will be cancelled.
The auto redial gets cancelled automatically when the call matures.
Special Trunk Group Access
A separate trunk access code can be given for certain trunks. These trunks have to be grouped
accordingly in the system-programming mode. This feature can be used for giving a separate
code for accessing trunks with STD/ISD facility.
To access the special group
Step Action You get
1.
Dial the access code of specific trunk group
(default code is `89’).
Trunk dial tone.
2. Dial the external telephone number.

Printer Form Feed
You can give a form feed for the printer connected to the printer port of the system. This
feature will be useful when connecting an inkjet or a DeskJet printer to the system.
To give form feed command:
Step Action You Get
2. Dial PROG key followed by system password.
KTS display will show
`MODE’.
3. Dial `56 + 000 + 83 + 001’ Form Feed On.
4. Dial `56 + 000 + 83 + 000’ Form Feed Off.
5. Press RLS Key.
Forceful release of a line
This feature can be used for disconnecting any trunk line or extension, which is in
conversation.
To forcefully release a line
1. Dial the code for force drop (default code is
`51’) + Extension number or trunk number.
Confirmation tone.
2. Press the RLS key. Line gets released.

Chapter 3
Some Unique Hotel Features
DX offers some very unique features for a Hotel. The description of the features is as follows:
a) Checking-In a room with registration of guest name.
b) Dialing Rights with Check-In.
c) Checking-Out a room along with withdrawal of dialing rights printing of bill for
call charges.
d) Floor Service to call the floor attendant.
e) Temporarily Check-Out
f) Temporarily Check-In
g) Room Shifting
h) Wake-Up Alarm
Hotel Name Setting
This feature allows you to enter the Hotel Name. The Hotel name will be printed on the top of
the checkout bill. A DSS is required for entering the hotel name.
To enter Hotel name
Step Action You get
1. Put the handset on cradle.
2. Press Check-In key.
The display will show
“CHECK IN : ”
3. Dial 9. You will see an arrow.
4. Enter the Name using the DSS keys.
5.
After entering the name, Press the HOLD key
of key phone to complete the process.

Check-In
When a guest checks into the hotel, operator has to register his name in the system
activate dialing rights from the extension of the room.
To Check-In a room
Step Action You get
1. Put the handset on cradle.
2. Press CHECK-IN / MEMO key. The display will show “CHECKIN ”
3. Enter the required room number.
If a valid room number is entered,
the display will show an arrow.
4. Enter the guest name using the DSS keys.
After entering the guest name, Press the
HOLD key of KTS to complete the
Check-In process.
5.
If Advance is enabled, + will appear
and you can enter the advance amount
taken from the guest Press the hold key
to complete the Check-In process.
System will record the current date and time as the check in date and time of the room.
Now the guest can directly make the outgoing calls depending on his dialing rights. All the
calls made from the room will be stored in the system memory.
Note : During the checking-in of a guest, his name can be entered only with the
help of a DSS. The Corresponding alphabet of every key is marked on the DSS. A
maximum of Rs. 9999 can be entered as advance.
Check-Out
When a guest wants to check-out, operator will have to Check-out that room to get the details
of outgoing calls that were made by the guest from the room. This feature will work only if a
printer is connected to the system is in ON LINE condition.

To Check-Out a guest
1. Press CHK-OUT / CONF key. The display will show “CHECK OUT ”.
2.
Enter the desired room number.
If the console is programmed to
calculate the various bills (like
food, laundry etc.), enter the data
as explained below
After entering all the bill amount, the bill
will be printed automatically, and the direct
dialing facility of the room is deactivated.
The current time and date will be recorded
as the check out date and time of the room
and it will be printed on the bill.
Whenever a room is checked out, the guest name will be washed out. Therefore, if a room is
rechecked -out , the guest name will not be printed.
Note: If you try to check out a room when the printer is not connected or it is in
OFF LINE condition, or previous check out is not complete, display will show “
Error.
On checking-out a room, dialing facility of that room will be disabled. Further, if a room is
checked-out, that room extension can be set in Don’t disturb mode (to avoid the misuse of the
room extension). On checking-out a room, the checked-out room should be in DND state or
not, it is programmable (refer system programming).
Entering of the bills
This feature is used for entering the various bills such as food, laundry etc.. The maximum
amount that can be entered is, 4 digits for Rupees, followed by 2 digits for Paise. To enter
less than 4 digits for Rupees value, press 002 key of DSS after entering the Rupees amount.
Now the decimal point will automatically appear in the display you can proceed to enter
the Paise value. However, if you have to enter a 4-digit Rupees value, there is no need to use
the 002 key of DSS. After entering the 4-digit Rupee value, the decimal point will appear in
the display. If you don’t want to enter the Paise value, press 002 key of DSS for the next
entry.
For example, if you want to enter the value of Rs.450.70; Press 450 002 key of DSS key
then press 70. In case you want to enter the value Rs.5750.00; Press 575000
continuously.
When a room is being checked out, after entering the correct room number, the display will
show the following messages in sequence:

Sr. No..
“Rent.. ”.
“Food....”.
“Laundry..”.
“Misc..”.
“Tax..”.
Enter each bill as explained above. After the operator enters the figures for tax, the printer
will start printing. The telephone bill of the room will be calculated automatically the
amount will be included in the grand total. The Hotel name, the name of the guest, Check in
and Check out date and time will be printed along with the bill amounts, in the printout. The
bill will also have the details of trunk calls made from the room such as, the time at which the
call was made, the number dialed, the duration of the call and the amount charged for the call.
The bill will be printed with advance taken from the guest and balance left to be paid.
Note : If any wrong entry is made while filling the bill amount, press RLS to
terminate the Check-out process..
If all the above fields are required to be asked while checking out a room, these fields have to
be enabled through system programming.
Guest Message Reminder
If a guest is out of the hotel operator get a message for him in guest absence, operator can
leave an intimation on guest’s extensions by using this feature. On registering an intimation
for a guest, if the room has a KTS extension, the MSG LED on the KTS lights up. If the room
has a normal single line telephone (SLT), the telephone will give a small ring every minute.
When the guest lifts the handset of his telephone, he will get the intimation message (if
system has VSN2 Card). However, the guest can dial any extension number when the
message is being played. This message will continue to play until operator cancels the
message reminder.
Note that guest will hear the prerecorded voice message intimating him that there is a
message collected from the operator.
To activate the Message Reminder for a room
Step Action You Get
1.
Call the desired room extension on getting
the ring back tone, press MSG key.
Confirmation tone.
2. Hang up.

Cancellation of Guest Msg.
When the guest calls the reception for collecting his message, operator has to press `MSG'
key while conversing with the guest. This will cancel the message reminder for his room.
Private Line
A trunk line can be defined as the dedicated trunk for a guest. This dedicated trunk line will
be known as the private line to a room. The private line can be set by the operator if only if
the room is already checked-in. On setting a private line for a room, if the telephone in the
room is lifted, there will be internal system dial tone of the PBX for 3 seconds duration
(during which any of the internal numbers can be dialed) and if no number is dialed then its
private trunk line will automatically get connected to the room extension the external
number on the PSTN network can be dialed. Also incoming calls on this trunk line will land
directly at that room .
To set a private line
Step Action You get
1.
Keep the receiver off hook and press the TCHK-
IN / FLASH key.
The display will show
“PRIVATE”.
2.
Now enter the room number, for which the private
line has to be set.
The display will show an
arrow.
3. Press the required trunk line except the 1st trunk. `PASS‘ will be displayed.
4. Press the RLS key.
The private line will get automatically removed when the Check out command is given for
that room. The private line can also be removed without checking-out that room.
To cancel the private line
Step Action You get
1.
Keep the receiver off hook and press the
TCHK-IN / FLASH key, followed by the
room number.
The display will show an arrow
followed with the trunk number
that was set as private line.
2. Press displayed trunk number to remove it.

Room Shifting
This feature allows you to shift a guest from one room to another. On shifting a room, all the
calls, which were made by the guest from the previous room, will be shifted to his new room.
Note that previous room will get checked out new room will be checked-in automatically.
To shift the room
Step Action You get
1.
While receiver is on the hook,
press Rm - Shift / TRSF key.
Display will show “ Shift Rm”.
2. Enter old room number.
If room number is correct and it is checked in
display will show an arrow.
3. Enter the new room number.
If new room number is correct and it is not
checked in, then the display will show “PASS”
and all calls, check in time, amount and name
will be shifted to the new room.
Note : A room can be shifted only once. Pls. note while shifting a room, advance
amount will not be shifted.
Reprint Room Bills
This feature allows you to take a reprint of the bills of any checked-out room. The reprint of
the previous bill is possible only if room has not yet been checked in again.
To reprint check out bills (Re-chkout)
Step Action You get
1. Press CHK-OUT / CONF key. Display will show CHECK OUT :
2. Enter desired room number.
If the room number is correct and is not
checked in, you will get a reprint of the
check-out bill.

Wake up Alarm
Operator can set the wake up alarm for a room. At the time of alarm, the telephone in the
room will ring. If the guest does not pick up the handset of the instrument within one minute,
the alarm will be diverted to the main operator indicating that the ALARM ring had failed.
Alarms can be set only for the next 24 Hours. If at the time of alarm the extension is busy
then it will ring after one minute. If self-alarm is also set by the guests then the latest setting
will be effected.
To set an alarm for a room
Step Action You get
1. Press the EMG/ALARM key.
2. Dial the Room Number. An arrow will be displayed on the KTS.
3.
Enter the wake up alarm time in the 24
hour format.
Cancellation of alarm for a room
Step Action You get
1. Press the EMG/ALARM key.
2. Dial the Room Number. An arrow will be displayed on the KTS.
3. Set the wake up time `HH 60’
Important : This feature can be used only if the room is checked in and these
features cannot be set for the operator.

Temporary Check-Out
This feature is used when a guest has gone out from his room and he doesn’t want misuse of
his telephone in his absence. This feature temporarily checks out his room, after which the
room will temporarily not be allowed direct dialing facility.
To Temporary Check-Out a room
Step Action You get
1. Press T-CHK-OUT / PHOLD key.
Display will show “CHECK OUT :
Temp.
2. Dial the required Room No.
the display will show `PASS’.
Note :. After using this command, the printout of that particular room will not
get printed. So this feature can be used without connecting the printer. The printout
can be taken only after using the CHECK OUT command.
Temporary Check-In
This feature is used to restore the dialing facility to the room, which was temporarily checked
out.
To use Temporary Check-In
Step Action You get
1. Press T-CHK-IN / FLASH key
Display will show “CHECK IN :
Temp
2. Dial the required Room No
the display will show `PASS’.
3. Press the RLS key

Floor Service
In case separate room service departments are present for each floor, we can have an
arrangement of having the same room service codes for each floor. This means that guests at
different floors can call room service using the same number, the system will route their call
to the service department on their floor. Thus enabling speedier service to the guests. The
default floor service code is 87. The procedure for calling the room service is as follows :
To call the floor service
Step Action You Get
2. Dial the floor service code i.e. ‘87’. Wait for an answer.
Room Status
Operator can check the current status of the room whether it is checked in or checked-out.
Operator can check-in a room only if it is already checked out.
To Check the Room Status
Step Action You Get
1. Replace the handset.
2. Press HOLD key. Stat Rm :
3. Enter the desired Room No.
You will get the status of the
entered room.
Note : Floor service extension is set through system programming.
Important : Hotel Features of the DX, can be integrated with the HMS (Hotel Management
Software). Refer DX CTI Manual.

12 Flexible Keys
Check-In Key LCD Display
EMG / ALARM
Program Key Redial Key Chk-Out
Unused Temp Chk-Out
Handset Message Temp Chk-In
DSS of 48 Keys
Speaker Phone
Room Shift Key
Release Key Hold Key
Key Diagram of Executive Operator Console (Type –I)

MSG key
DND LED Check-Out key
INT LED
Unused key
LCD display
Handset Room-Shift SPK TChk-Out
Or PHOLD
Digital Volume RDL EMG/ALARM
PROG HOLD
Check-In TChk-In / FLASH
RLS
Key Diagram of Operator key phone (Type –II)

EMG / ALARM key
LCD Display
MSG key
Handset CHK-IN key
CHK-OUT key
T-Chk-Out
PROG Or PHOLD
RLS
120 keys DSS
Rm-Shift RDL key
Temp SPK HOLD key
Chk-In
Key Diagram of Executive Operator Console (Type-III)

Chapter 4
Keys on Operator Console
Audio Level Adjustment
The audio level adjustment is used to control the sound that is emitted from the telephone’s
speaker and handset. CORAL DX2000 XL provides three types of key phones. Two type of
key phones offers digital volume control. The same volume control can be used to control
handset voice level, ringer volume and speakerphone volume works on situation specific
mode.
Another type of key phone offers separate volume controls for the speaker and the handset.
Knobs are present on the sides of your key telephone set for both the speaker and for the
handset. While conversing through the speaker, voice volume can be adjusted using the
speaker volume control knob. The speaker volume will also be the same when activating
background music or voice paging. While conversing through the handset, receiver volume
can be adjusted using the receiver volume control knob.
One-Touch Keys
Each key telephone set has some one touch keys ( The number of keys are dependant on the
model of the key phone) which can be programmed according to your requirement. The keys
have bicolor LEDs that indicate the status of an extension or a trunk line. The keys can also
be programmed to store any global Memory bank number. The programming has to be done
using the system programming. The keys will glow red when the programmed extension or
trunk line is busy with any extension or trunk. That will glow green when they are busy with
your extension. You can use these keys to access any extension or trunk by just pressing the
corresponding key.
DSS (Direct Station Selector)
An additional equipment can be installed with the operator key phone that will work as the
part of the operator key phone. This special equipment will be known as Direct Station
Selector’. The direct station selector (DSS) has some keys, each of which has a LED. DSS
will be defined through the system programming. The keys on the DSS can be programmed
according to your requirement. The keys can be programmed to show the status of an
extension or a trunk line. It can also be programmed to store a global memory bank number.
The DSS keys can be operated similar to the one-touch keys on your key set.

Name / Dial Number Display
Operator key telephone set has a 2 X 16 character LCD. When your telephone is idle, the
display will show the current date and time. Whenever an internal call lands on your
extension, the display will show the caller’s name and extension number. When an external
call from PSTN network lands on your key phone then if the trunk line has CLI facility, the
external caller’s number will be displayed on your key phone. When the key phone user dials
a number, display also shows the number dialed by you.
On Line Advice of Call Charge
While making an external call, the display will show the numbers dialed by you. On maturity
of the call, the display will show the charge for the call and also the time elapsed for the call.
The duration and call charges will be updated automatically till the call is terminated.
Step Action You Get
1. Make an external call. KTS will show the dialed No.
2. Converse with the called party.
Rupee paise charge of the made call it
will be updated automatically.
Note: Cost of the call will be calculated as per the Cost Table. The display of AOC is
programmable.
PROG Key
This key is used for programming the features of the system. For details regarding the
programming of the system, please refer to the system programming section.
CHK-IN (Memo) Key
This Key is used for Checking-In a room.
REDIAL Key
This key is used to redial the last dialed trunk number. It is also used to call the station who
has left internal message.

SPK Key
This key is used to activate the speakerphone. In order to activate the speakerphone, press
the SPK key and start dialing out or speaking if a call has landed on the key telephone.
Pressing the `SPK’ key is like activating the cradle.
Room-Shift (TRSF) Key
This key is used in Hotel Version to shift a room to the another room.
RLS Key
This key is used to disconnect a call after the conversation is over. Alternatively, on
completion of programming, press the RLS key to come back to stand by mode.
HOLD Key
This key is used to put the call on hold for transferring a trunk call, alternatively, in the
programming mode, the HOLD key is used to go to the next mode in programming.
This key is used for knowing the room status also.
MSG Key
This key is used to view the left message for the operator or another extensions. This key is
also used to leave an internal message to a busy extension. The MSG key is also used to
view the auto redial numbers.
Temp Chk-Out / P-Hold key
This key is used for T-Check-Out. This key is used to put a call on hold also. A call in
conversation by the key telephone user can be kept on personal hold by pressing the P-
HOLD key. This will ensure that these calls are not picked up by other key telephone users.
In order to retrieve the call , press the P-HOLD key again.

Chk-Out / Conf Key
This Key is used to activate a conference. This key is used to check-out a room also.
Temp Chk-In / Flash Key
This key is used for temp Check-In.
In order to clear an Auto redial number stored or to clear an internal message, press the MSG
key which enables you to view the auto redial number or the internal message. Now press
FLASH to clear the message or the number in redial mode.
EMG / ECALL / ALARM key
This key is used to activate the emergency call or to set the wake up alarm for an extension.
Using this key, operator can override the DND extension also.

Chapter 5
Extension Features
Internal Call
A room extension user can make an internal call to any extension in the system by the
following method:
Step Action You Get
2.
Dial the desired extension number or press the
predefined key on key phone.
Ring back tone.
Note: In case of the called extension is busy, use call back facility.
External Call : (Right Dependent)
A room extension can make the outgoing calls if operator has checked-in the room. You can
make an external call through any of the trunk lines connected to the system.
To make an external call:
Step Action You Get
1. Lift the handset. Dial tone
2.
Dial trunk access code (0, or any other number
programmed for the purpose.
Trunk Dial tone
3. Dial the Number. Ring Back tone/Busy tone
The default trunk access codes are 0, which selects any free trunk line. To select specific
trunk lines the default codes are 700,701,702…...

Attending Incoming Calls
Incoming calls to your extension, will start ringing. Just lift the handset speak up.
Step Action You Get
1. Lift the handset. Start conversation.
Call Transfer : (Right Dependent)
An internal or external call received / originated can be transferred from that key phone to
other extension. The call can be transferred after screening or without screening.
To transfer a call
Step Action You get
1. While talking, press the FLASH key. Wait for the confirmation tone.
2. Dial the desired extension number. Hear the ring back tone.
3
If you find the called extension busy, press the
FLASH key again for taking the line back.
You will get back the held call.
4
If during transferring a call, an invalid
extension number is dialed by mistake, press
the FLASH key again to take back the call
start the call transfer process again.
You will get back the held call
you can try again.
At this level you can either screen or connect straight away
Screened Transfer:
1.
While hearing the ring back tone, wait for the
answer.
2
If you get an answer from the dialed extension,
announce the call hang up.
Call will be transferred both
the parties will be connected.

3.
If none is answering the call, you can take back
the calling party back by pressing the FLASH
key again.
You will get back the call.
Unscreened Transfer :
1.
While hearing the ring back tone during
transferring a call, hang up.
Called extension will start
ringing.
During an unscreened transfer, if there is no answer from the destination extension, the call
will come back to the extension that transferred the call. If at the time of call back, calling
extension is busy, the call will be diverted to the operator.
Call Consult
This feature allows you to consult a third party while conversing with an external or internal
caller. While consulting, the original caller will be put on hold and will get hold on music.
Step Action You Get
1.
While talking to a party, press the FLASH
key.
Confirmation tone.
2.
Dial the second party number (Extension or
trunk)
Talk with the second party
3.
If the second party disconnects. You will get connected to the
first party.
4.
Or you can keep toggling between first
second party by pressing the FLASH key.
You get connected to the other
party and the currently
connected party goes on hold.
This way you can toggle
between two parties.

Brokers Call
This feature allows you to put a call on hold and then converse with a third party, while
switching between the two calls. The party not in conversation is automatically put on hold.
To activate Broker’s call:
Step Action Remarks
1. Press the FLASH key + Dial the new number. Wait for an answer.
2.
When both the parties are connected Press
FLASH to alternate between the two parties.
Toggling between both the
parties will be possible.
Redial
Extension user can repeatedly dial the last number dialed on the trunk, without pressing all
the numbers again. For this follow the procedure below:
Step Action You get
2. Press the `*’ key.
The last dialed number will be
redialed automatically.
Call pick-up
This feature allows you to answer other ringing extensions within the system. There are two
types of call pickup one is `Call pick within service extensions’ another is `pick any
ringing extension’.
To pick up the call within a department :
Step Action You Get
2. Dial the call pick up code (default code is 88 ) Connected to the calling party.

Note that you can pick an incoming call within service extensions.
Important: If several extensions in the group are ringing then the call pick up would be n
following order:
i) Ringing trunk ii) Ringing Ext iii) Queued trunk line to an ext. (not operator)
To pick any ringing extension:
Step Action You Get
2.
Dial the code of the specific call pick up
(default 54) + ‘Ringing extension no.’
Connected to the calling party.
Auto call back on busy extension / trunk
If the called extension or trunk is found busy, this feature automatically connects you to the
called party as soon as the called line is free. If the call back is for an extension, your key
phone will ring as soon as the called extension becomes free. Simultaneously, the called
extension will also ring. If the call back is for a trunk line, the trunk will be allotted to your
key phone as soon as it becomes free and your extension will ring. On lifting your handset,
you will get the trunk dial tone.
To activate Call back on a busy line:
Step Action You Get
1.
Dial the extension number or the PSTN
selection code.
If called extension or trunk is
busy, you get busy tone.
2.
On getting busy tone, dial the auto call back
code (default code is `8’).
Confirmation tone.
3. Hang up.
Now as soon as busy extension or trunk gets free, your key phone will start ringing.

Listening-In : (Right Dependent)
This feature enables an extension user to monitor an extension or trunk line without an audio
warning to the monitored party. Listening in can be activated while attempting to call a busy
extension or trunk line.
To activate listen in on a busy extension or trunk line:
Step Action You Get
2. Dial the busy extension or trunk no. Busy tone.
3. Dial the listen-in code (default code is ‘6’). Voice of the calling parties.
4. Hang up to terminate. Listening-in will be terminated.
Emergency call (Only from key phone)
This feature allows the operator to break into an established two party call. It can be used for
conveying any emergency message for an internal party. On activating emergency call on an
extension, the party who was conversing with this extension, will automatically go on hold
and will hear HOLD on music.
To activate an emergency call
1.
On getting the busy tone while calling an
extension, press EMG / ECALL Key.
Connected to the called
extension.
2.
Announce the message hang up for
terminating the emergency call.
Conversation between original
parties will be re-established.
Enter Own Supervisory Mode
Several feature can be activated through supervisory mode. This feature illustrates how to
enter into own supervisory mode. This programming is extension specific hence

Dx2000 xl hotel

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