NEC UX5000, Руководство по оборудованию, Страница: 256 / 334

4 - 62 Chapter 4
Chapter 4 - Terminals and Optional Equipment
4.15.3
Installing the Power Failure Terminals:
1. Connect an RJ-61 connector to the CN3 power failure port on the COIU blade installed in the
UX5000 system.
2. Install a modular jack for each single line terminal supporting PF operation (2 per COIU). The
modular jack should be within six feet of the terminal.
3. For each extension, run one-pair 24 AWG station cable from the cross-connect block to a
modular jack.
4. Terminate the extension leads to GRN/RED of the modular jack. Terminate the unused leads
to the jack.
● When the power goes out, trunks 1 and 2 automatically switch to the SLT terminals to
answer/receive calls. Once the power returns, the trunks automatically switch back. Any
current calls can be complted first, then the trunks will switch back.
Figure 4-31: POWER FAILURE CIRCUIT INSTALLATION
The 4COIU blade with 4COIUDB is shown.
CN2(COIU)
Analog Trunk
From Central Office
for Interface Circuit.
#1-#4
CN3
SLT I/F for
Power Failure
Transfer
#1-#2
CN1
CN4
Trunk I/F Circuit #4
Daughter Board I/F
(for COIU/082U)
CN5
Common
Control
Circuit
BUSY LED
(Status for Trunk Lines)
ON: Trunk in Use
OFF: Idle
LIVE LED
(Status LED)
Pin Number
Location
8
7
6
5
2
1
CN2(COIDB)
Analog Trunk
From Central Office
for Interface Circuit.
#5-#8
Trunk I/F Circuit #3
Trunk I/F Circuit #2
Trunk I/F Circuit #1
Trunk I/F Circuit #1
Trunk I/F Circuit #2
Trunk I/F Circuit #3
Trunk I/F Circuit #4