NEC DSX-40 - Power Failure Telephone; Power Failure Cut-Through

Power Failure Telephone
56 ◆ Optional Equipment DSX-40 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.
Analog stations 25 and 26 (extensions 324 and 325) are the permanent power failure extensions. When
power fails:
❥ Analog extension 324 (station 25) automatically cuts through to line 1.
❥ Analog extension 325 (station 26) automatically cuts through to line 2.
For more on connecting extensions, see Connecting Extensions and Lines (page 28).
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.
- Place a test call.