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...

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...

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...

-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...

IMI66-083Installat.
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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...

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...