Comdial Digital Telephone System Instructions Manual

InstallationIMl66-107Power Failure Station Connections
The system provides a tip and ring pair connected to
line 1 as an emergency power failure circuit. This
circuit is active during a commercial AC power failure if
an external battery assembly is not installed to provide
battery back-up power to the system. Connect an
industry standard, single-line telephone, such as a
model 2500, to a power failure pair.and use it toprovide communications capability until the 
AC power
to the system is restored.
The...

IMl66-107
Installation
Auxiliary Equipment Interface
You can connect an industry-standard telephone or
data device on a line ahead of the common equipment
if you wish.If you do so, the system can detect an
off-hook condition in the connected device and turn on
the line status light at the system telephones to
indicate that the line is busy. 
Table 3-1 (on page 7)
and 
Figure 3-8 below detail the auxiliary interface
connections.
NOTE: When you are employing this auxiliary
interface feature, the...

installationIM166-107Common Audible And
Auxiliary Ringing Interface
You can use he relay closure dry-contact points for
controlling external audible equipment. These contact
closures track the pattern of the ringing for incoming
calls. The contacts are closed during the ringing
period and are open during the silent period.
A typical common audible connection is illustrated
on 
Figure 3-9 .
piifq
Do not exceed a 1 amp at 24 volts (0.5 amp
at 48 volts) load on these control terminals.
If the load...

IM166-107Installation
(Wiring shown for low current application - see caution text)
Power
Source for
- AGorY,.....a+ .-,J”
Signallingl-0
IllpuL as
bvimRequiredw-.,1-I
(Wiring shown with slave relay connection for high current application - see caution text)Wire to 
o
EE:
- Power
24V Q lAMax.%tF for
4 ACorDC
48V 0.5A Max.Input as
Interface
-II- RelayRequired
Relay
VcltaKmta;ng Diode
Slave
RelayPower
Syrc~ for4 ACorDC
;;wtwInput asRequired
,
Station Connector Block
(4-Line, b-station and
E-Line, 1...

InstallationExternal Paging Interface
The system provides a special transformer-isolated
paging port that you can use to couple the system to a
customer-supplied external paging amplifier. This
external paging port does not provide a talk-back path
nor will it recognize DTMF dial tones.
You can use the relay closure dry-contact points that
the system makes available at the ringing port terminal
for controlling the external paging amplifier during a
paging operation. These contacts close 
and stay
closed...

IM166-107External Paging Interface 
- Line Port
You can use class of service programming to convert
a line port to be an AUXILIARY port. As an
AUXILIARY port, a user can use it to couple a
telephone to an external paging device that you have
wired to the line port. He or she does this from any
station with that line presence by pressing the proper
line button to select the AUXILIARY port. The user
can 
dial DTMF tones or dial pulses through the
AUXILIARY port as needed. The paging enable...

InstallationIMl66-107Data Device Connections
The system provides two RS232 Data Ports for use.
0 When you use a video display terminal (VDT) to
perform class of service programming, connect it to
RS232 Data Port A.
0 When you use a serial data printer for SMDR,
SMDA, and COS printout, connect it to the RS232
Data Port B.
0 When you use a Caller ID Interface (product code
CID08) to identify incoming calls, connect it to
RS232 Data Port B using the special cable provided
with the CID08. Refer to the...

4
c
IiF’
TO RS232
DATA PORT ATYPICAL 
VDTINTERFACE
INOUSTRY STANDARDUOOULAR LINE CORDI4-CONDUCTOR)INDUSTRY STANDARD
MODULAR LINE CORD
I4-CONWCTOR)
TYPICN UOUJLAR TO EIA ADAPTERWIRlN6 SHOWN FOR REFERENCE ONLY.
TYPEN 
MODULAR TO EIA ADAPT6RWlRlN6 SHOWN FOR REFERENCE ONLY.MODULAR JACK DATA PORTS
ll6-LINE. 32-STATION BASE UNITI
Figure 3-i2. Typical Data Device ConnectionsRS232
DATA PORT 
0
hifzii65431 I
RS232DATA PORT A
IFRONT VIEW OF J&KS1
= NO CONNECTION: =CTS3 -RD4 = Tb5 = so6 : NO CONNECTION
ST~NJI...

InstallationIMl66-107Music Interfaceimpedance of this input is approximately 500 ohms.
If music is to be part of the system, connect aUse the volume control on the music source to adjust
customer-provided music source to the commonthe audio level of the music as required.
equipment music interface jack (phono jack) provided
for this purpose as shown below in Figure 3-13. The
MUSIC INTERFACE
MUSIC SOURCE
(FOR MUSIC ON
HOLD AND BACKGROUND
MUS IC 1
Figure 3-13. Music Interface 

IMl66-107InstallationAdd-On Expansion Module
Introduction
You can install one or two optional add-on expansion
modules on the common equipment base unit to
increase the line and station capacity of an installed
system. The add-on module is as follows:
0 408 Expansion Module - A four-line by eight-station
expansion unit
The expansion capabilities provided by the add-on
module are shown in 
Figure 3-14 on the next page.
The default numbering of the expanded lines and
stations begin with the next higher...