Comdial Dsu II Digital Telephone System Instructions Manual

							2.9 Connecting The Common Audible
And Auxiliary Ringing Interface
You can use the 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.
CAUTION
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.
2.9.1 Connecting Outside Lines
Common audible terminalsprovide a dry-contact closure whenever any of the outside lines that
you have connected to the common equipment ring with an incoming call.
2.9.2 Connecting Selected Ports
Station 17 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
the station 17 or the programmable paging port as the ringing destination. Refer to Chapter 3 for
programming 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 the illustration on the next page.
CAUTION
Do not connect an external paging device or any external ringing device to station port 17
connections.
When you have programmed for paging port ringing, it is a common practice to use a
customer-supplied external paging amplifier connected to the paging 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 Section 2.10 for a discussion of external paging amplifier connections and
information for using the paging port ringing terminals in an alternate paging enable
function.
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							CLIP TERMIINALS
26
1
{
{
Common
Audible
Station 17
Audible
39
40
41
42
43
44
45
46
47
48
49
50
Station Connector Block
(4-Line, 8-Station and
8-Line, 16-Station Base Units)
(Wiring shown for low current application - see caution text)
Wir e to
Common
Audible
Interface
Relay
Wir e to
Common
Audible
Interface
RelaySignalling
Device
Signalling
DevicePower
Source for
Signalling
DeviceAC or DC
Input as
Required
AC or DC
Input as
Required
AC or DC
Input as
Required 24V @ 1A Max.
48V @ .5A Max.
24V @ 1A Max.
48V @ .5A Max. (Wiring shown with slave relay connection for high current application - see caution text)
Power
Source for
Slave
Relay
Voltage Clamping Device
Recommended
Slave
RelayPower
Source for
Signalling
Device
DSU222
Common Audible Jack (pins 1 & 6)
(16-Line, 32-Station Base Unit)123456
Pin 1
Pin 6}Common Audible Pair=
Connecting Typical Common Audible Interface Wiring
DSU II Digital Telephone System IMI66–132
Installing The DSU II Digital Telephone System 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.
J1632 Base Unit
J1 Connector Block
Station 17 Audible Connection for
(J0408 and J0816 Systems)
1
2
3
4
5
6
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49
50
CLIP TERMIINALS
50
26
1 25
Audio Input
Enable Input Connect Audio
Input To Common
Equipment
Paging Port
DSU224
PA System
J0408 Base UnitPaging Port
J0816 Base UnitPaging Port
Paging Port
DSU224
1 2 3 4 5 6
Pin 2
Pin 5}Station 17 Audible Pair=
Connecting A Typical External Paging Interface
IMI66–132 DSU II Digital Telephone System
2 – 32  Installing The DSU II Digital Telephone System 
						

							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.
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.
.
PA S y s t e m
Program line port as
auxiliary port and connect
PA system to tip and ring
pair of that port.
Audio
Input
{
{
{
{
DSU215
Connecting A Line Port As An External Paging Port
DSU II Digital Telephone System IMI66–132
Installing The DSU II Digital Telephone System 2 – 33 
						

							2.12 Connecting Data Devices To The System
The DSU II includes serial data ports for use. The common equipment cabinet provides these
ports as standard modular jacks labeled COM 1 and COM 2 This section contains information on
two stages of wiring these 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.
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 serial data ports on the J0408 and four serial data ports on the J0816
and J1632 for use.
·When you use a personal computer (PC) to perform class of service programming or to load
system software into the system, connect it to COM 1.
·When you use a serial data printer for SMDR, SMDA, COS printout, or Caller ID, connect
it to the COM 2.
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.
IMI66–132 DSU II Digital Telephone System
2 – 34  Installing The DSU II Digital Telephone System 
						

							IBM
IBM
IBM
5 4
3
2
Front View
of Jack654321
TD
RD
SG
}From COM 1
Serial Data Port
Typical VDT
Interface
Typical
625A2
Modular
Jack
Industry Standard
Modular Line Cord
(4-conductor)Typical modular to EIA adapter
wiring shown for reference only.
Typical Personal Computer
Typical
Data Printer
1
2
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4
5
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25
1
2
3
4
5
6
Front
Vi ew o f
JackSG RD TD
5 4
3
2
Front View
of Jack654321
TD
SG
}From COM 2
Serial Data Port
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.
1
2
3
4
5
6
7
8
9
10
11
12
13 14
15
16
17
18
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20
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25
1
2
3
4
5
6
Front
Vi ew o f
JackSG RD
dsu263.cdr
CAJS105
1
2
3
4
5 6
7
8
91
2
3
4
5
6
Front View
of 6-Conductor
Modular Jack
Rear View
of 9-Pin Female
EIA ConnectorSG
TD
RD
CTS
Typical Modular To 9-Pin EIA Adapter
Wiring Shown For Reference Only
Connecting Data Devices Through Modular Connections
DSU II Digital Telephone System IMI66–132
Installing The DSU II Digital Telephone System 2 – 35 
						

							2.12.2 Making The Common Equipment Data Connections
You must make wiring connections from the modular jack (wall jack) to the common equipment
cabinet modular jack for the data connection.
The default data communications format is as follows:
·8-bit data with 1 stop bit and no parity
·Baud rate of 9600 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.
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							J1632 Base UnitJ0408 Base Unit
J0816 Base UnitCom 2
Com 2
Com 2 Com 3
Com 3
1.= Request to Send (RTS)
2.= Clear to Send (CTS)
3. = Receive Data (RD)
4. = Transmit Data (TD)
5. = Signal Ground (SG)
6. = No ConnectionCom 1
Com 1
Com 1 Com 4
Com 4
DSU225
(Front View of Jack)
6
5
4
3
2
1
Making Data Connections To The System
DSU II Digital Telephone System IMI66–132
Installing The DSU II Digital Telephone System 2 – 37 
						

							2.12.3 Connecting A Personal Computer
For Remote Programming
You can connect a personal computer (PC) to the DSU II digital telephone system remotely
through modems as described below. (For information on direct connection, refer to Section
2.12.1. )
You will need the following customer-supplied equipment:
·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.
Make the equipment connections per the following procedure:
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 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 PC was connected directly to the system.
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							If you experience difficulty in establishing a communications path between your PC, modems,
and the digital telephone system, note the suggestions that are listed below.
·Confirm that the modems are wired correctly. Be sure RD, TD, and SG are connected to the
system’s serial data connection. Reverse connections at pins 2 and 3 if necessary.
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. Also check the manual for any
additional wiring connections.
·Use a breakout box data tester to troubleshoot the data communications lines.
·Be sure that your modem has: auto-answer capability, DTR override, and CD override and
that the Result Codes, On-Line Echo, Off-Line Echo, and Flow Control are disabled. Plus,
make sure that you have enabled the modem’s auto-answer feature. The way to do this is to
program an initialization string into the modem. A typical initialization string that uses
generic modem AT Commands for connection to a telephone system’s serial data port is as
follows:
AT E0 F1 L2 Q1 S0=0 &C0 &D0 &K0 &W0 &Y0.Remember, this is a typical
initialization string—not all modems will respond to it. You should refer to your modem’s
instruction manual if you have difficulty.
Typical
Personal Computer
Data JackLine
Switch Telco Network
Network
Jack Data
JackTypical Common
Equipment Cabinet
Data
Port
Line
Port
Network Jack Data
Modem
Data
Modem
dsu260.cdr
Installing A Personal Computer For Remote Programming
DSU II Digital Telephone System IMI66–132
Installing The DSU II Digital Telephone System 2 – 39