Comdial Impact Dsu Instructions Manual

Figure 2–13: Connecting Typical Common Audible Interface Wiring
IMI66–107Digital Telephone System
Installing The DSU 2 – 31 

2.10 Using The External 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...

2.11 Using A Line Port As An
External Paging Interface
You can use class of service programming to program 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 relay...

2.12 Connecting Data Devices
This section contains information on two stages of  wiring connections for data devices.
Section 2.12.1 explains connections from stations to modular jacks. Section 2.12.2 details wiring
from the modular jack to the DSU by way of the punch-down-block.
2.12.1 Making Modular Jack Data Connections
Modular jack connections are wiring connections from a station to a modular (wall) jack.
The system provides two RS232 Data Ports for use.
·When you use a video display terminal (VDT)...

Figure 2–16: Connecting Data Devices Through Modular Connections
IBM
IBM
IBM
5 4
3
2
Front View
of Jack6 5 4 3 2 1
TD
RD
SG
}From RS232
Data Port A
Typical VDT
Interface
Typical
625A2
Modular
Jack
Industry Standard
Modular Line Cord
(4-conductor)Typical modular to EIA adapter
wiring shown for reference only.
Video Display
Terminal
Typical
Data Printer
1
2
3
4
5
6
7
8
9
10
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12
1314
15
16
17
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25
1
2
3
4
5
6
Front
View of
JackSG RD TD
5 4
3
2
Front View
of Jack6 5 4 3 2 1
TD
SG
}From...

2.12.2 Making The Common Equipment Data Connections
You must make wiring connections from the modular jack (wall jack) to the G0408 and G0816
common equipment cabinets by way of the punch-down-block, while the G1632 cabinet
provides modular jacks for the data connections.
The default data communications format is as follows:
·7-bit data with 2 stop bits and no parity
·Baud rate of 300 baud.
Configure a data device to match this format for initial operation or reprogram the system’s data
format to match...

Figure 2–17: Making Data Connections To The System
Station Connector Block Data Ports
(4-line, 8-station base unit and
8-line, 16-station base unit)
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2
3
4
5
6
7
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9
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50
CLIP TERMIINALS
50
26
1 25
6 5 4 3 2 1
6 5 4 3 2 1
Modular Jack Data Ports
(16-line, 32-station base unit)
RS232
Data Port BRS232
Data Port A
(Front View of Jacks)
1 = No connection
2 = CTS
3 = RD
4 = TD
5 = SG
6 = No...

2.12.3 Programming With A Video Display Terminal
You can program the digital telephone system using a telephone or a Video Display Terminal
(VDT). You can connect the VDT directly to the DSU, or you can program the system remotely
using the following equipment:
·VDT or a PC and appropriate software program,
·Pair of data modems.
The data modems must be: “Hayes-compatible,” capable of 300-, 1200-, 2400-, or 9600-baud
data speeds, and have auto-answer capability. Be sure to verify the auto-answer...

If you experience difficulty in establishing a communications path between your VDT, modems,
and the digital telephone system, note the following suggestions:
·make sure that you have enabled the modem auto-answer feature,
·confirm that the modems are wired correctly. Reverse connections at pins 2 and 3 if
necessary,
·check the modem’s instruction manual. You may have to make additional wiring
connections,
·sometimes you must strap pin 4 to 5, or pin 6 to 7, or pin 6 to 8 to 20 in the modem wiring.
Check...

2.13 Using The Music Interface
If music is to be part of the system, connect a customer-provided music source to the common
equipment music interface jack (phono jack) provided for this purpose. The impedance of this
input is approximately 500W. Use the volume control on the music source to adjust the audio
level of the music as required.
Figure 2–19: Using The Music Interface
Typical
Common Equipment
(8-Line, 16-Station
Base Unit Shown)Music Interface
Music Source
(for music on hold
and background...