Power Failure Telephone; Power Failure Cut-Through - NEC DSX-160 Hardware Manual

Power Failure Telephone

Power Failure Cut-Through

When AC power fails, the system can automatically cut through to a Power Failure Telephone connection.
Each COIU Card has two power failure cut-though connections.
To install Power Failure Cut-Through:
1. Locate an available 8-pin jack in a line or station block.
- Local codes may prevent you from using a connector on a line block for optional equipment.
2. For the 8-pin jack chosen, locate the first two circuits in the block. If your jack is the first jack in the
block, for example:
- The first power failure circuit is the
- The second power failure circuit is the
3. Install a modular jack for each Power Failure Telephone within 6 feet of the telephone's location.
4. For each Power Failure Telephone, run one-pair of 24 AWG station cable from the appropriate circuit on
the block to the telephone's modular jack.
5. Terminate the station cable leads to the
6. Install bridging clips as required.
Plug the 8-pin connector into the power failure jack on the COIU PCB.
7.
To test the Power Failure Telephone:
Connect the power failure telephone.
1.
2. Power down the system.
3. At the Power Failure Telephone, lift the handset.
- You should hear dial tone on the line you connected.
4. Place a test call.
To Power
Failure
Telephone
connector on
8-Pin
COIU PCB
Connector
DSX-80/160 Hardware Manual
RED
Station
Block
25 Pair
Installation Cable
Power Failure
Telephone 2
Figure 48: Connecting a Power Failure Telephone
Power Failure Telephone
- pair.
WHT/BLU BLU/WHT
WHT/ORN - ORN/WHT
and GRN lugs in the modular jack.
WHT-BLU BLU-WHT
GRN RED
BLK YEL
625
Modular
Jack
Power Failure
Telephone 1
pair.
WHT-BLU BLU-WHT
GRN RED
BLK YEL
625
Modular
Jack
Optional Equipment ◆ 63