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 power 
failure.pair is located as follows and as
detailed in 
Figure 3-7 below.
NOTE: The system also provides one power failure
connection with each add-on expansion
module.POWER FAILURE TERMINALS ON
STATION CONNECTOR BLOCK
I4-LINE, 8-STATION AND 8-LINE, I6-STATION BASE UNITS1TYPICAL INDUSTRY STANDARD
NON-ELECTRIC TELEPHONE
(POWER FAILURE INTERFACE1
--
GfPJ/
gj--1-w34--l--
35--l--
36--l--
37--i--
36
--1--39--l--
40--l--
41----c-
42--t--
43---I--
44--I--
45--l--
46--l--
47--I--
46--I--
49--l--
SO--l--
CLIP TERMINALS
-OR-
POWER FAILURE JACKlI6-LINE, 32-STATION BASE UN111
Figure 3-7. Power Failure Connection
3-22 
						

							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 line-to-line port
reassignment as discussed previously and in
Chapter 4 works as described except in regard
to line 2 and line 4.Line 2 can only be
reassigned to line port 4 and line 4 can only be
reassigned to line port 2
0 Connection is across tip and ring of lines 2 and 4.
The system provides the auxiliary interface
connections at terminals 
1 and 6 of common
equipment line jacks 1 and 2.
Figure 3-8. Auxiliary Interface Connections 
						

							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 requirements exceed this limit,
connect the load through an external slave
relay. DO NOT CONNECT THESE
CONTROL TERMINALS DIRECTLY TO THE
117VAC LINE.
Outside Lines
0 Common audible terminals provide a dry-contact
closure whenever any of the outside lines that you
have connected to the common equipment ring 
with
an incoming call.
Selected Ports
0 Station 7 7 audible terminals provide a dry-contact
relay closure whenever ringing is sent to station 17
or to a programmable destination. Use class of
service programming to choose either station 
17 or
the paging port as the ringing destination. Refer to
Chapter 4 for details.
When you have programmed for station port 
17
ringing, it is a common practice to use a
customer-supplied external device to provide loud
ringing and connected in a manner similar to the
common audible arrangement shown in 
Figure 3-9.
1CAUTION 1
Do not connect a external paging amplifier
or any external ringing device to the
station port 17 connections.
0 When you have programmed forpaging port
tinging, it is a common practice to use a
customer-supplied external paging amplifier
connected to the paring port to amplify and
broadcast the ringing tones sent to, the paging port
by the system . You can employ the relay closures
that appear at the ringing terminals to energize the
external paging amplifier during the periods when
the ringing tones are being sent if necessary.
NOTE: Refer to the following paragraph headed
m for a discussion of
external paging amplifier connections and
infotma tion for using the paging port ringing
tem?ina/s in an alternate paging eriable
function.
3-24 
						

							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 E-Station Base Units)
cAJsw7
Station 17 Audible
Common Audible
Barrier Strip
(lbline, 32Station Base Unit)
Figure 3-9. Typical Common Audible Interface Wiring3-25 
						

							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 during the time that a paging operation is active
to provide a constant enable signal path for the paging
amplifier.
IMl66-107NOTE: This paging enable constant closure function
overrides the ring pattern closure provided
when ringing is sent to the paging port.See
the previous paragraph titled 
-on Au&&
0 Connect the audio input of a customer-supplied
external paging amplifier to the paging port as
shown below in 
Figure 3-10.
0 If the paging amplifier requires an enable signal,
connect the enable leads to the station 17 audible
terminals as shown in 
Figure 3-10.PA SYSTEM
coyI) EOUlPYllTOil@& l6-sTAfloN 8UEIJMIT mom,
46-+-
+,-+-----w-46 -+- --B--M.
t:-=r-- -
alp 7mw1~~6TO RINGING PORT
/TERMINALS IF ENABLE IS
REOU IRE 
0.STATION 
17 AUDIBLE
BARRIER STR IP
l16-LINE. 32-STATION BASE UNIT1STATION CONNECTOR BLOCK
I4-LINE. 8-STATION AND 8-LINE. IG-STATION BASE UNITS1
Figure 3-10. Typical External Paging Connection3-26 
						

							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 relayInstallation
closure feature discussed previously is not available
for use with this installation.
0 Connect the audio input of a customer-supplied
external paging amplifier to the tip and ring leads of
the AUXILIARY port as shown in 
Figure 3-l 1 below.
0 You can install a DTMF tone select, zone-paging
amplifier if you wish.If do you install this type of
amplifier, the user must dial the zone-select code
after he or she presses the AUXILIARY port line
select button.
Program line port as Program line port as
auxiliary port and connectauxiliary port and connect
PA system to tip and ring
PA system to tip and ring
that port.
PA SystemRING 3
w ! TIP3LTIP 4
LINETERMINATION‘TYPE 
66MXX CONNECTOR BLOCKOR‘INDIVIDUAL 6-POSITIONMDDULAR JACKS________I______-____----------------CM01
Figure 3-11. Typical External Paging Connection - Line Port
ii3-27 
						

							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 paragraph titled 
C&r
Identification Service Support (located on page
4-40) for installation details associated with this
feature.
The distance between a data device and the common
equipment can be up to 500 feet in a quiet electrical
environment. Some sites may require shielded cable
for long runs. For longer distances, you must install
limited distance modems to relay the data
communications between the common equipment and
a data device.
When preparing a cable for connection to a data
device, refer to the manufacturer’s manual for the
equipment being interfaced and make the following
wiring connections:
0 Wire the common equipment RD (data from device
to common equipment) connection to the device TD
(transmit data) connection.
0 Wire the common equipment TD (data to device
from common equipment) connection to the device
RD (receive data) connection.
0 Wire the common equipment SG (signal ground)
connection to the device SG (signal ground)
connection.
0 If required for proper operation, wire the common
equipment CTS (clear-to-send status from device to
common equipment) connection to the device RTS
(request-to-send) connection.
NOTE: The common equipment requires a positive
voltage, with respect to signal ground, in order
to send data.
The default data communications format is as follows:
0 7-bit data with 2 stop bits and no parity
0 Baud rate of 300 baud
Configure a data device to match Jhis format for initial
operation or reprogram the system’s data format to
match those of a data device.
The system’s data ports are located as follows and are
connected as illustrated in 
Figure 3-12 on the next
we.
rbLine, &Station And &Line, 164tation Base Units
lClip terminals 37 - 40 (dataport A) and 41 -44
(data port B) on station connector block.
SuLPoRTPORT RTD = TERMINAL 37
TERMINAL 41RD = TERMINAL 38
TERMINAL 42CTS 
= TERMINAL 39TERMINAL 43SG = TERMINAL 40TERMINAL 44
l&Line, 32-Station Base Unit
0 Special modular jacks are available as data ports
SIGJACKNone1
CTS
2
RD
3
TD4
SG5
None6 
						

							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 CormcmR aocK DATA KRTS
%B-STATICN BAB LNIT Ml8-LIIGSTATICN M INIT)
NOTES :I. MAXIMUM DISTANCE BETWEEN COMMON EQUIPMENT
CABINET AND PRINTER OR VDT TYPICALLY LIMITED
TO 500 FEET. LONGER DISTANCES 
REWIRE LIMITED
DISTANCE MODEMS AT EITHER END OF RUN.
2. SOME DATA 
OEVICES REQUIRE CTS SIGNAL FORVROPER OPERATION. ROUTE TO DEVICE AS NEECED. 
						

							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 line or station 
port
number from that provided by the host base unit. The
numbering continues sequentially from top module to
bottom module if two modules are installed. For
example: The defaulted 
8-line, 16-station base unitprovides station ports 10 through 25 and lines 1
through 8. When installed, a 408 Expansion module
will provide station ports 26 through 33 and lines 9
through 12 thus creating a twelve line by twenty-four
station system.
Each expansion module provides a tip and ring pair as
an emergency power failure circuit. This circuit is
connected to the first module-provided line.
The line connections of the expansion module are
available at two modular jacks. When facing the jack
openings, lines 1 and 2 are provided by the jack on the
right and lines 3 and 4 are provided by the jack on the
left. Line connections are detailed in 
Table 3-5,
below.
The station connections are available at a 
50-pin
connector. 
Table 3-6 detail these station connections.
Table 3-5. Line Connections - 408 Expansion Module
Add-On Expansion Module - continued on next page . . .
3-31