Nitsuko Portrait 824 Hardware Manual

EXTERNALPAGING AND PAGE RELAYS
4-9
Using External Paging
Each Auxiliary PCB has two External Paging audio outputs and two
associated control relays. The External Page zones are two way which
provide for the ability to do talk back paging (no additional program-
ming required). The audio outputs are connected 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...

EXTERNALPAGING AND PAGE RELAYS
4-10Figure 4-5  CONNECTING EXTERNAL PAGING/RELAYS
Figure 4-6  CONNECTING EXTERNAL PAGING
One-Pair Cross-Connect
DDK 
Connector To External Page
audio output on 
Auxiliary PCB
25-Pair DDK
Installation CableC Block
Cross
Connect
BlockOutput to
paging
system
control
inputs
82400 - 10
One-Pair Cross-Connect
DDK 
Connector To Control Relay
on Auxiliary PCB
25-Pair DDK
Installation CableC Block
Cross
Connect
BlockOutput to
paging
system
control
inputs
82400 - 9
HDWR1D.QXD...

EXTERNALPAGING AND PAGE RELAYS
4-11
Figure 4-7  ATTACHING THE FERRITE BEAD
Figure 4-8  CONNECTING CONTROL RELAYS TO THEAUXILIARYPCB
82400 - 21
EXMOH CTR2 RL2
BGM SPK2 RL1
DH2 CTR1 ALM2
DH1(SPK2)
(SPK1)
(DH2)
(DH1)
Auxiliary PCB AmplifierAmplifier
SPK1/SPK2: External paging audio signal output.
CTR1/CTR2: Normally open relay contacts. If a zone
isactivated,thecontactsclose. Paging Speaker #2Paging Speaker #1
SPK1 ALM1
VR3 VR4 VR1 VR2 CN3 CN2 CN1
Ferrite bead
To Paging
or Door Box
connection
Loop each...

DOOR BOX
4-12
Using the Door Box
Each Auxiliary PCB supports two Door Boxes. In addition, you can
connect each circuitÕs control relay to an electric door strike. This
allows an extension user to remotely activate  the door strike while talk-
ing to a visitor at the Door Box. The control relays are normally open.
Installing a Door Box (Figure 4-9)
1.Locate an available 2-pin DDK connector in an auxiliary (C) block.
2.For the DDK connector chosen, cross-connect the associated wire
pair from the C block to...

DOORBOX
4-13 Figure 4-10  ATTACHING THE FERRITE BEAD
Figure 4-11  CONNECTING A DOOR BOX
One-Pair Cross-Connect
DDK 
Connector To DHI or DH2 connector
on Auxiliary PCB
25-Pair DDK
Installation CableC Block
Cross
Connect
BlockOutput to
door box
82400 - 42
Ferrite bead
To Paging
or Door Box
connection
Loop each cable once
through Ferrite bead
DDK connectors
to Auxiliary PCB
82400 -53
HDWR1D.QXD  5/18/98 4:56 PM  Page 13 

DOOR BOX
4-14
Installing Door Strike Control Relays(Figure 4-12)
CAUTION
Be sure the requirements of the door strike are compatible with the
control relay output specifications of the system.
Contact Configuration: Normally open
MaximumLoad: 250 mA@ 24 VDC
Maximum Initial Contact Resistance: 50 mOhms
1.Locate an available 2-pin DDK connector in an auxiliary (C)
block.
2.For the DDK connector chosen, cross-connect the associated wire
pair from the C block to the cross-connect block.
3.Connect two leads...

DOOR BOX
4-15 Figure 4-12  CONNECTING TO THE DOOR STRIKE
Figure 4-13  CONNECTING DOOR BOX/DOOR STRIKE RELAYS TO THE
AUXILIARYPCB
82400 - 43
EXMOH CTR2 RL2DH1 SPK1 ALM1BGMSW2
INT(MOH)
(BGM)EXTOFFON SW1
SPK2 RL1DH2 CTR1 ALM2(SPK2)(SPK1)(DH2)(DH1)
Auxiliary PCBDoor Box
To Door Strike
Terminals
VR3 VR4 VR1 VR2 CN3 CN2 CN1
One-Pair Cross-Connect
DDK 
Connector To Control Relay
on Auxiliary PCB
25-Pair DDK
Installation CableC Block
Cross
Connect
BlockOutput to
door strike
82400 - 8
HDWR1D.QXD  5/18/98 4:56 PM...

MUSIC SOURCES
4-16
Music on Hold and Background Music
Music on Hold (MOH) provides music to callers on Hold and calls
parked in orbit. The systemÕs default setting provides an internal
(synthesized) MOH music source, or a customer-provided music
source connected to the Auxiliary PCB can be used instead (see
below).
Background Music sends music from a customer-provided music
source (via a connector on the Auxiliary PCB) to keyset speakers.
Installing a Music Source on the Auxiliary PCB (Figure 4-14)...

MUSIC SOURCES
4-17 Figure 4-14  CONNECTING MUSIC SOURCES
Figure 4-15  CONNECTING TO THE AUXILIARY PCB
82400 - 22
EXMOH CTR2 RL2DH1 SPK1 ALM1BGMSW2
SW2
INT
INT
Off
(MOH)
(MOH)
(BGM)
(BGM)
EXT
EXT
On
OFF
OFF
ON
ON
SW1
SW1
SPK2 RL1DH2 CTR1 ALM2(SPK2)(SPK1)(DH2)(DH1)
Auxiliary PCB External MOH SourceBGM Source
The relay contacts RL1 and 
RL2 can be used as 
MOH/BGM device control. 
The remote control terminal 
on the device must be 
connected to these contacts. 
(see Program 56)
VR3 VR4 VR1 VR2 CN3 CN2 CN1...

POWER FAILURE TELEPHONES
4-18
Power Failure Cut-Through (Figure 4-16)
When system AC power fails, the 4 PF XFER PCB automatically
connects up to four trunks to the Power Failure Telephones.
Installing a Power Failure Telephone
1.Plug a 2-pin DDK connector to a COCN connector on the CPU or
2CO/8STAPCB. Plug the other end into a PFCON connector on
the 4 PFXFER PCB.
2.Plug a 2-pin DDKconnector to a COCN connector on the 4 PF
XFER PCB. Connect the other end to the 625 modular jack lead-
ing to the RJ11C...