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

Power Failure Telephone
DSX-80/160 Hardware Manual Optional Equipment ◆ 63
Optional
Equipment
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 WHT/BLU - BLU/WHT pair.
- The second power failure circuit is the WHT/ORN - ORN/WHT pair.
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 RED and GRN lugs in the modular jack.
6. Install bridging clips as required.
7. Plug the 8-pin connector into the power failure jack on the COIU PCB.
To test the Power Failure Telephone:
1. Connect the power failure telephone.
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.
Figure 48: Connecting a Power Failure Telephone
1093096 - 28
BLK YEL
GRN RED
To Power
Failure
Telephone
connector on
COIU PCB
Power Failure
Telephone 1
Station
Block
8-Pin
Connector
BLU-WHTWHT-BLU
625
Modular
Jack
BLK YEL
GRN RED
Power Failure
Telephone 2
BLU-WHTWHT-BLU
625
Modular
Jack
25 Pair
Installation Cable