Comdial DIGITECH Digital Telephone System Instructions Manual

							IMI 66-083Installa+’
COMMON AUDIBLE AND AUXILIARY
RINGING INTERFACE
Relay closure dry-contact points are available for controlling
external audible equipment. These contact closures track
the pattern of the ringing . The contacts are closed during
the ringing period and are open during the silent period. A
typical common audible connection is illustrated on 
Figure3-9 below.
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
l Common audible terminals provide a dry-contact closure
whenever any of the outside lines that are connected to
the common equipment.Selected Ports
The station 17 audible terminals provide a dry-contact relay
closure whenever ringing is sent to a programmable
destination. Class of service programming is used to
choose either the paging port or station port 17 as the
ringing destination. Refer to page 4-13 for details.
When programmed for station port 17 ringing, an external
device is often used to provide loud ringing similar to the
common audible arrangement shown in Figure 
3-8.
When programmed forpaging port ringing, an external
paging amplifier is employed to amplify and broadcast the
ringing tones sent to the paging port. The relay closures that
appear at the ringing terminals can be employed to energize
the external paging amplifier during the periods when the
ringing tones are being sent.
NOTE: Refer to the following paragraph 
headedFadInterface for a discussion of external paging
amplifer connections and information for using the
paging port ringing terminals in an alternate paging
enable function.
-_-bow CURRENT APPuDATlDNS ONLY - SEE CAUTION lExt-)
:.----------.--..-..---..-...-------.~AUDIBLE OR DOMMDN AUDIBLE
TERMINALS
(WITH SLAVE RELAY CONNECTIONS FOR HIGH CURRENT APPLICATIDN . SEE CAUllDN TEXT)STATION CONNECTOR BLOCK
l4-LINE. 8-STATION AND
B-LINE. I6-STATION BASE UNITSI
,,+, VOLTAGE CLAMPINODIODE RECOMMENDEDSTATION 
17AUDIBLE
Af OR DC tNPUT
’ s’EtikiNoAS REWIRED0
POWER0
Figure 3-9. Typical Common 
Audible Interface Wiring 
						

							AonIMI 66-083
EXTERNAL PAGING
INTERFACE
A special transformer-isolated paging port is used to
couple the system to an external paging amplifier.
Relay closure dry-contact points are available at the
ringing port terminal and can be used 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.
NOTE: 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 Common 
Auciit&. .. .AndRlV.
l Connect the audio input of an external paging
amplifier to the paging port as shown below in
Figure 3-10.
l If an enable signal is required by the paging
amplifier, connect the enable leads to the station 17
audible teminals as shown in 
Figure 3-10.PA SYSTEM
II
50-+-l ‘-CUP lERYlNAL6TO RINGING PORT
STATION 
17 AUOIBLEBARRIER STR 
IPIIC-LINE. 32-STATION BASE UNIT)
STATION CONNECTOR BLOCK
(4-LINE, e-STATION AND S-LINE, IC-STATION BASE UNITS)
Figure 340. Typical External Paging Connection 
						

							IMI 66-083Installa:.
EXTERNAL PAGING
INTERFACE 
- LINE PORT
A line port can be configured by class of service
programming to be an AUXILIARY port. As an
AUXILIARY port, it can be used to couple a station to
an external paging device. This coupling is done from
any station with that line presence by pressing the
proper line key to select the AUXILIARY port. DTMF
tones or dial pulses can be dialed through the
AUXILIARY port as needed. The paging enable relayclosure feature is not available for use with this
installation.l The audio input of an external paging amplifier can
be connected to the tip and ring leads of the
AUXILIARY port as shown in 
Figure 3-11 below.
l A DTMF tone select, zone-paging amplifier can be
employed if desired. If used, the zone-select code
must be dialed after the AUXILIARY port line select
key is pressed.PROGRAM LINE PORT
AS AUXILIARY PORT
AND CONNECT PA SYSTEM
TO TIP AND RING PAIR
OF THAT PORT.PA SYSTEM
0 AUDIOINPUTCOMMON EQUIPMENT
18 WNE. 16 STAllONBASE UNIT SHOWN1r------- - ---II
I
xz :dTIP 
IiTIP 2
I
XQ J*ITIP 
3TIP 4I
%X f?%z fTIP 5ITIP 6
RING 8
3FG/ITIP 
0I
I
10 mDlvIaJJK 6-fosrrlom 11YOWLM JICKL------------4
Figure 3-l 1. Typical External Paging Connection - Line Port
.
3-19 
						

							-ionIMI 66-083
. . .:
DATA DEVICE CONNECTIONS
‘The sys?em provides two RS232 Data Ports for use.
l When a video display terminal (VDT) is used to
perform class of service programming, connect it 
to
RS232 Data Port A.
l When a serial data printer is used for SMDR,
SMDA, and 
CCS printout, connect it to the RS232
Data Port B.
The distance between the data device and the
common equipment can be up to 500 feet in a quiet
electrical environment. Shielded cable may be
required at some sites for long runs. For longer
distances, a limited distance modem must be used to
relay the data communications between the common
equipment and the 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:
Wire the common equipment RD (data from device
to common equipment) connection to the device TD
(transmit data) connection.
Wire the common equipment TD (data to device
from common equipment) connection to the device
RD (receive data) connection.
Wire the common equipment SG (signal ground)
connection to the device SG (signal ground)
connection.
If required for proper operation, wire the common
equipment CTS (clear-to-send status from device tocommon 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 format is as follows. Configure the
data device to match this data format for initial
operation.
@ 7-bit data with 2 stop bits and no parity
6 Baud rate of 300 baud
The Data Ports are located as follows and are
connected as illustrated in 
Figure 3-12 on the next
page.
IdLine, &Station And &Line, 16~Station Base Units
0 Clip terminals 37 - 40 (data port A) and 41 - 44
(data 
port B) on station connector block.
SIG.PORT APORT B
TD-TERMINAL 37TERMINAL 41
RD=TERMINAL 38TERMINAL 42
CTS =TERMINAL 39TERMINAL 43
SG=
TERMINAL 40TERMINAL 44
WLine, 32.Station Base Unit
@ Special modular jacks are available as data ports
SIGJACK CONN.None 1
CTS 2
RD 3
TD 4
SG 5
None 6 
						

							IMI66-083Installat.
llllllilliiiiiliiiil5
TTTTTTITTTTTTTTTTTTT1111111111111111111 E
3-21 
						

							itrionIMI 66-083
MUSIC INTERFACE
If music is to be part of the system, connect a
customer-provided music source to the common
equipme,nt music interface jack (phono jack) provided
for this 
puwse as shown below in Figure 3-13. Theimpedance of this input is approximately 500 ohms.
Use the volume control on the music source to adjust
the audio level of the music as required.MUSIC SOURCE
(FOR MUSIC ON
tii&DFND BACKGROUND
Figure 3-13. Music Interface
3-22 
						

							IMI 66-083Instalk:SECTION 3
ADD-ON EXPANSION MODULES
INTRODUCTION
One or two optional add-on expansion modules can
be installed on the common equipment base unit to
increase the line and station capacity of an installed
system. The add-on module is as follows:
l 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
1 61 No ConnectionI
I
3-23 
						

							InstallationIMI 66-083
4-LINE, &STATION BASE UNIT24-PORT SYSTEM&LINES AND 16.STATIONS
(BASE “NlT PLUS ONE EXPANSION MODULE)
36-PORT SYSTEM12.LINES AND PI-STATIONS
(BASE UNIT PLUS ONE EXPANSION MODULE)&LINE, l&STATION BASE UNIT
4&PORT SYSTEMl&LINES AND 3%STATIONS
(BASE UNlT PLUS TWO EXPENSION MODULES)
2C-LINES AND40-STATIONS
(BASE IJNlT PLUS ONE EXPANSION MODULE)
72.PORT SYSEM24.LINES AND 4BSTATIONS
(BASE UNlf PLUS TWO EXPANSION MODULES)
Figure 3-14. Add-On Expansion Module COnfigWatiOn3-24 
						

							IMI 66-083Installa-‘onTable 3-6. Statlon Connections 
- 408 Expansion Module
MOWN-WHITE
WHITE-SLATE
ISLATE-WHITE
4
309
510PATH
SLATE-VIOLET
sTA.l
STA
1M
2M
3M
4M
5M
6M
7M
6M
POWER
STATION
NNECTIONS
.OCATlON3-25 
						

							mstallat/$nIMI 66-083INSTALLATION
Each add-on expansion module measures 15.5 wide x
-1.4 high x 1.6 wide and weighs approximately 4
pounds. The modules are designed to be attached to
the base unit and connected to it via cabling.
l The first module must be connected to the upper
location on the base unit.
To install an expansion module to a base unit, refer to
Figure 3-15 and perform the following procedure.
1. Disconnect both AC power and external battery
back-up power from the system.
2. Remove and set aside nameplate from base 
unit.
This action exposes internal cable connector on
base unit circuit board.
3.Reach through opening in base unit and mate
module cable plug with base unit circuit board
connectors.4. Push excess cable inside base unit housing
through connector opening.
5. install expansion module in place on all four
mounting holes. Be sure excess cable is not
pinched between add-on module and base unit.
6. Pull module down to latch in place.
7.Use flat-blade screw driver to tighten module
securing screw into base unit threaded fastener.
8. Snap nameplate into slots on top of module
housing.
9.Attach a #lO or #12 insulated, solid copper wire
between the grounding terminal on the expansion
module and the grounding terminal on the common
equipment cabinet.
1 O.Refer to Chapter 4, and perform configuration
programming for new station and/or line ports.TYPICAL BASE UNIT
(O-LINE, I6-STATION BASE UNITIlllllllllllllllllllllllllllllllll
lllllllllllllllllllllllllllllllll
lllllllllllllllllllllllllllllllll
lllllllllllllllllllllllllllllllll
NAMEPLATE
(REMOVE TO EXPOSE BABE
UNIT CONNECTORS)
LUPPER MOUNTING HOLESI2 PLACES)
.
LOWER 
YOUNTINB HOLES
BOTTOU Q12 PLACES1LOCATION-y
I 00
09GROUNDMODULESTO BABE
UNIT
CONNECTIN CABLEAND PLUB
BECUR INBSCREW
I’ (
SNAP SLOTS FOR
NAMEPLATETYPICAL ADD-ON MODULE
Figure 3-15. Expansion Module lnstallatlon
3-26