Nitsuko 24i/28i/124i/384i Hardware Manual

3. Installing
Extensions and Trunks
3-12CONNECTING TRUNKS
DID Trunk (2DIDU) PCB Connections(Figure 3-12)
The DID PCB has DDK connector for two Direct Inward Dial
(DID) trunk circuits.
1. Following the conventional color code, insert the DDK
connectors into CO1 and CO2 on the PCB. For example,
the first 2DIDU PCB in the system would have these 
connections:
Trunk DDK Connector Pair
1 WHT-BLU (tip 1) / BLU-WHT (ring 1)
2 WHT-ORN (tip 2) / ORN-WHT (ring 2)
Write down the connections for each 2DIDU PCB in...

3. Installing
Extensions and Trunks3-13CONNECTING TRUNKS
Figure 3-13  DID TRUNK CONNECTIONS
25-Pair Cable
to Central Office
25-Pair DDK
Installation CableTelco
RJ21X One-Pair
Cross Connect
A
Block
926 - 46 

4. Optional
Equipment
Section 4, INSTALLING OPTIONAL EQUIPMENT
In this section  . . . . . . . . . . . . . .Page2-OPX Module  . . . . . . . . . . . . . . . . . . . . .4-22
Using the 2-OPX Module . . . . . . . . . . . . . . . 4-22
Installing the 2-OPX Module . . . . . . . . . . . . 4-22
VAU and Expansion Modules  . . . . . . . . . .4-24
Using the VAU Module . . . . . . . . . . . . . . . . 4-24
Installing the VAU Module . . . . . . . . . . . . . . 4-24
Installing the Plug-in Expansion Board . . . . . 4-26...

4. Optional
Equipment
4-2
In this section  . . . . . . . . . . . . . .PageWall-Mount Kit (Cont.)
Installing the Wall-Mount Handset Hanger
for 922 Series Phones . . . . . . . . . . . . . . . . 4-36
Wall-Mounting a Key Telephone on 
926/922 Sereis Phones . . . . . . . . . . . . . . . 4-37
Using the Desk Stand on 926/922 
Series Phones . . . . . . . . . . . . . . . . . . . . . . 4-38
Installing the Wall-Mount Handset Hanger 
for i-Series Phones . . . . . . . . . . . . . . . . . . 4-39
Wall-Mounting i-Series...

4. Optional
Equipment4-3
ALARM AND FAX SENSORS
Using External Alarm and Fax Sensors
The 4PGDU PCB provides four alarm/fax circuits which you
can program to detect a make or break closure from an alarm,
fax machine or modem.
When a 4PGDU circuit is used for alarm . . .
An alarm detection causes the system to send a signal to sta-
tions programmed to receive the alarms. The alarm signal can
also be sent to external paging speakers.When a 4PGDU is used for fax sharing . . .
Fax sharing allows system users...

4. Optional
Equipment
4-4
ALARM AND FAX SENSORS
Installing an External Alarm or Fax Sensor
Circuit(Figure 4-1)
CAUTION
Be sure the requirements of the fax machine and alarm system
sensors do not exceed the system specifications.
Maximum Initial Contact Resistance: 100 mohm
1. Locate an available DDK connector in a trunk (A) block or
station (B) block.
Local codes may prevent you from using a DDK con-
nector on the A block for optional equipment.
2. For the DDK connector chosen, cross-connect the...

4. Optional
Equipment4-5
ALARM AND FAX SENSORS
Installing an External Alarm or Fax Sensor
Circuit(Cont’d)
5. Write down your connection on Figure 3-4 (page 3-4).
6. To program fax sensors .. .
With the default settings, fax sensors are disabled.
0304 - PGDU PCB Alarm/Fax Sensor Setup
Program the sensor for fax (type 2) and associate it with the
trunk.
Refer to Fax Machine Compatibilityin the Software Manual
for additional details
To program alarm contacts . . .
With the default settings, PGDU sensors are...

4. Optional
Equipment
4-6
EXTERNAL PAGING AND PAGE RELAYS
Using External Paging
Each PGDU PCB has four External Paging audio outputs and
four associated control relays. You connect the audio outputs to
audio inputs on customer provided paging systems. In some
paging systems, you can use the control relays to automatically
turn the amplifiers on and off. The control relays are normally
open and close whenever a user calls the External Paging zone.
Notes:


The 3-ACI Analog Communications Interface can...

4. Optional
Equipment4-7
EXTERNAL PAGING AND PAGE RELAYS
Installing External Paging(Cont’d)
1. Locate an available DDK connector in a trunk (A) block or
station (B) block.
Local codes may prevent you from using a DDK con-
nector on the A block for optional equipment.
2. For the DDK connector chosen, cross-connect the associated
wire pair from the A or B block to the cross-connect block.
3. Connect two leads from the paging system audio inputs to
the associated terminals on the cross-connect block.
4....

4. Optional
Equipment
4-8
EXTERNAL PAGING AND PAGE RELAYS
Installing External Paging (Cont’d)
8.To program External Paging .. .
With the default settings,
External Paging is enabled at all extensions. The External
Paging zone number is the same as the circuit number. For
example, the lowest numbered paging circuit you set up is
external zone 1.
Refer to Paging, Externalin the Software Manual for addi-
tional details.
9. After programming External Paging, make a test page.
Use VR1-VR4 to adjust the volume...