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 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.
·Connect the audio input of a customer-supplied external paging amplifier to the paging port.
·If the paging amplifier requires an enable signal, connect the enable leads to the station 17
audible terminals.
Figure 2–14: Connecting A Typical External Paging Interface
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CLIP TERMIINALS
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1 25
J1 Connector Block
(G0408 and G0816 Systems)
Audio Input
Enable Input Connect Enable
Input To Station 17
Audible Terminals
If Enable Is Required.
Barrier Strip
(G1632 System)
CAJS042A
PA System
Typical Common
Equipment
Paging
Port
Digital Telephone SystemIMI66–107
2 – 32 Installing The DSU 
						

							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 closure feature
discussed previously is not available for use with this installation.
·Connect the audio input of a customer-supplied external paging amplifier to the tip and ring
leads of the AUXILIARY port.
·You can install a DTMF tone select, zone-paging amplifier if you wish. If you do install
this type of amplifier, the user must dial the zone-select code after he or she presses the
AUXILIARY port line select button.
Figure 2–15: Connecting A Line Port As An External Paging Interface
RING 2
RING 1
TIP 1
TIP 2
RING 4
RING 3
TIP 3
TIP 4
RING 6
RING 5
TIP 5
TIP 6
RING 8
RING 7
TIP 7
TIP 8CO/PBX
LINES
LINE TERMINATION
TYPE 66M-XX
CONNECTOR BLOCK
OR
INDIVIDUAL 6-POSITION
MODULAR JACKS.
.
Typical Common
EquipmentPA System
Program line port as
auxiliary port and connect
PA system to tip and ring
pair of that port.
Audio
Input
{
{
{
{
CAJS011A
IMI66–107Digital Telephone System
Installing The DSU 2 – 33 
						

							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) to perform class of service programming,
connect it to RS232 Data Port A.
·When you use a serial data printer for SMDR, SMDA, COS printout, or Caller ID, connect
it to the RS232 Data Port B.
NOTE: 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:
·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 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.
Digital Telephone SystemIMI66–107
2 – 34 Installing The DSU 
						

							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
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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 RS232
Data Port B
Typical Data
Printer Interface
Typical
625A2
Modular
Jack
Industry Standard
Modular Line Cord
(4-conductor)Typical modular to EIA adapter
wiring shown for reference only.
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1
2
3
4
5
6
Front
View of
JackSG RD
CAJS043C
IMI66–107Digital Telephone System
Installing The DSU 2 – 35 
						

							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 those of a data device. The tables below list the system’s data ports.
NOTE: 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.
For G0408 and G0816 cabinets, make data connections at the station connector block as follows:
Clip terminals 37-40 (data port A) and clip terminals 41-44 (data port B).
Table 2–8: Data Connections
Signal Port A Port B
TD = Terminal 37 Terminal 41
RD = Terminal 38 Terminal 42
CTS = Terminal 39 Terminal 43
SG = Terminal 40 Terminal 44
For G1632 cabinets, make data connections at special modular jacks.
Digital Telephone SystemIMI66–107
2 – 36 Installing The DSU 
						

							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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CLIP TERMIINALS
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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 connectionTD
RD
CTS
SG
TD
RD
CTS
SG
{
{
RS232
Data
Port A
RS232
Data
Port B
NOTES:
1.
2.
Some data devices require
CTS signal for proper
operation. Route to device
as needed.Maximum distance between
common equipment cabinet
and printer or VDT typically
limited to 500 feet.
Longer distances require
limited distance modems
at either end of run.
CAJS043D
IMI66–107Digital Telephone System
Installing The DSU 2 – 37 
						

							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 capability before
purchasing the units. You are assured of best results if you employ modems of the same make
and model at both the installation site and the remote programming site.
The equipment connections for the customer location are shown in Figure.
1. Determine the signal needs of the modem from the user’s manual for it. (The digital
telephone system only requires TD, RD, and SG but the modems may require more signals.
Check with the modem manufacturer for special requirements).
2. Wire the proper connector (to match the data jack) on one end of a length of multiline cable.
3. Punch down the appropriate leads on the connector block.
4. Connect the network jack of the data modem to an outside telephone line. (If a line is not
reserved for remote programming, have a line switch installed so that on site personnel can
switch the outside telephone line between the data modem and the digital telephone system
cabinet when you are going to perform remote programming.)
5. Refer to the user’s manual for the modem, and program the modem to automatically answer
after the first ring.
6. Interface the VDT or PC with the modem at the programming site per the user’s manuals for
the equipment be used.
7. Establish a communications link for programming the system from a remote site.
·If you have had a line switch installed at the customer site, call someone there and ask them
to set it for modem operation.
·After the outside line is connected to the modem, make the data link between the
originating and the remote modems, and perform programming from your remote site just
as if the VDT or PC was connected directly to the system.
Digital Telephone SystemIMI66–107
2 – 38 Installing The DSU 
						

							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 the modem’s installation manual for this requirement,
·use a breakout box data tester to troubleshoot the data communications lines.
Figure 2–18: Installing a Video Display Terminal
CLIP TERMIINALS
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{
{
RS232
DATA
PORT A
RS232
DATA
PORT B
TD
RD
CTS
SG
Video Display Terminal Or
Personal Computer
Data JackLine
Switch Telco Network
Network
Jack Data
JackTypical Common
Equipment Cabinet
Data
Port
Line
Port
Network Jack Data
Modem
Data
Modem
Station Connector Block Data Ports
(4-Line, 8-Station Base Unit and
8-Line, 16-Station Base Unit)
DATA CONNECTIONS
SYSTEM
DATA PORTMODEM
DATA JACK
CTS
RD
TD
SG--
TD
RD
SG
System requires that the CTS
pin be at a high logic level
before it will send data. It will
force the pin high if no modem
connection is supplied.
CAJS013
6 5 4 3 2 1
(Front View of Jack) Modular Jack Data Ports
(16-Line, 32-Station Base Unit)
1 = --
2 = CTS
3 = RD
4 = TD
5 = SG
6 = -- RS232
DATA PORTS
37
38
39
40
41
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44
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TD
RD
CTS
SG
IMI66–107Digital Telephone System
Installing The DSU 2 – 39 
						

							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 music)
CAJS088
Digital Telephone SystemIMI66–107
2 – 40 Installing The DSU