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

4. Optional
Equipment4-9
EXTERNAL PAGING AND PAGE RELAYS
Installing External Paging Control Relays (Figure 4-5)
CAUTION
Be sure the control circuit requirements of the paging equip-
ment are compatible with the control relay output specifications
of the system.
Contact Configuration: Normally open
Maximum Load: 60 mA @ 30 VDC
10 mA @ 90 VDC
Maximum Initial Contact Resistance: 50 mOhms
1. Locate an available DDK connector in a trunk (A) block or
station (B) block.
Local codes may prevent you from using a...

4. Optional
Equipment
4-10
EXTERNAL PAGING AND PAGE RELAYS
Installing External Paging Control Relays (Cont’d)
3. Connect two leads from the paging system control inputs to
the associated terminals on the cross-connect block.
4. Plug the DDK connector into the Control Relay (1-4) con-
nector in the PGDU PCB (Figure 4-6).
5. Install bridging clips as required.
There is no programming required.
6. Write down your connection on Figure 3-4.
Figure 4-6  CONNECTING TO THE PGDU
92001 - 43
Page/Door Box (PGDU)...

4. Optional
Equipment4-11
DOOR BOX
Using the Door Box
Each PGDU PCB audio output can optionally support an analog
Door Box. In addition, you can connect each circuit’s control
relay to an electric door strike. This allows an extension user to
remotely activate  the door strike while talking to a visitor at
the Door Box. The control relays are normally open. The sys-
tem can have up to eight Door Boxes and one Chime Tone.
Note:A PGDU circuit used for an analog Door Box cannot
also be used for External...

4. Optional
Equipment
4-12
DOOR BOX
Installing a Door Box (Cont’d)
4. Plug the DDK connector into the Door Box (1-4) connector
on the PGDU PCB (Figure 4-8).
5. Install bridging clips as required.
6. Make sure the switch for the associated Door Box is set to
DH (notPG).
7. Write down your connection on Figure 3-4.
8.To program the Door Box . . .
With the default settings, 
The Door Box number is the same as the circuit number (e.g.,
the lowest numbered circuit you connect is Door Box 1.)
1502 - Door Box...

4. Optional
Equipment4-13
DOOR BOX
Installing Door Strike Control Relays (Figure 4-9)
CAUTION
Be sure the requirements of the door strike are compatible with
the control relay output specifications of the system.
Contact Configuration: Normally open
Maximum Load: 60 mA @ 30 VDC
10 mA @ 90 VDC
Maximum Initial Contact Resistance: 50 mOhms
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...

4. Optional
Equipment
4-14
DOOR BOX
Installing Door Strike Control Relays (Cont’d)
3. Connect two leads from the door strike to the associated ter-
minals on the cross-connect block.
If the door strike is a high current device, you may
have to install an auxiliary relay that powers the door
strike relay.
4. Plug the DDK connector into the Control Relay (1-4) con-
nector on the PGDU PCB (Figure 4-10).
5. Install bridging clips as required.
The Door Strike control relays do not require any pro-
gramming....

4. Optional
Equipment4-15
MUSIC SOURCES
Music on Hold and Background Music
Music on Hold (MOH) provides music to callers on Hold and
calls parked in orbit. The MOH music source can be internal
(synthesized), from an ACI port (see page 4-28) or via a con-
nector on the CPRU (see below).
On the 28i system, Background Musicand Music on Holduse
the same music source. As BGM requires an external music
source, MOH must also use the external music source. MOH
can only use the internal synthesized  music if BGM...

4. Optional
Equipment
4-16
MUSIC SOURCES
Installing a Music Source on the CPRU PCB
(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 customer-provided music source
to the associated terminals on the cross-connect block....

4. Optional
Equipment4-17
MUSIC SOURCES
Installing a Music Source on the CPRU PCB
(Cont’d)
b.  Enter Program 0108 - Service Tone Setup, Item 18:
BGM. Change the TIMESLOT to 28 (the default setting
is 29).
c.  Set the MOH pin on the CPRU to EXTERNAL.
d.  Connect an external music source to the External Music
on Hold Input on the CPRU.
Background Music sends music from a customer-pro-
vided music source (via a connector on the CPRU) to
keyset speakers.
Note:ACI and CPRU MOH installations require a...

4. Optional
Equipment
4-18
POWER FAILURE TELEPHONES
Power Failure Cut-Through(Figure 4-13)
When system AC power fails, the ATRU PCB automatically cuts
through trunk 1 to the Power Failure Telephone connection.
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....