Power Failure Telephone; Power Failure Cut-Through - NEC DS1000 Operation Manual

Power Failure Telephone

Power Failure Cut-Through

When AC power fails, the system can automatically cut through to a Power Failure Telephone connection.
To install Power Failure Cut-Through (Figure 4-4):
● Connect the GRN and RED lugs on the PFT/MDM modular jack to the GRN and RED lugs on the
Power Failure Telephone's mod jack.
To test the Power Failure Telephone:
1. Connect the power failure telephone. See the illustration below.
2. Power down the system.
3. At the Power Failure Telephone, lift the handset.
4. Place a test call.
hangs up the Power Failure Telephone.
To PFT/MDM in
DS1000 cabinet
DS1000 Hardware Manual
You should hear dial tone from trunk 1.
If power is restored while a cut-through call is in progress, the call is maintained until the user
While your system is powered up, your Power Failure Telephone is extension 316.
BLK BLUE GRN
NC NC
NC NC
YEL WHT RED
Figure 4-4: Connecting a Power Failure Telephone
Power Failure Telephone
PFT
Power Failure
PFR
Telephone
GRN
Power
Failure
Telephone
Section 4: Optional Equipment ◆ 4-7
WHT-BLU BLU-WHT
RED
BLK YEL
625
Modular
Jack
4