Power Failure Telephone
DS1000 Hardware Manual Section 4: Optional Equipment ◆ 4-7
4
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.
You should hear dial tone from trunk 1.
4. Place a test call.
If power is restored while a cut-through call is in progress, the call is maintained until the user
hangs up the Power Failure Telephone.
While your system is powered up, your Power Failure Telephone is extension 316.
Figure 4-4: Connecting a Power Failure Telephone
PFT
PFR
Power Failure
Telephone
BLK YEL
GRN RED
Power
Failure
Telephone
BLU-WHTWHT-BLU
625
Modular
Jack
BLK BLUE GRN
YEL
To PFT/MDM in
DS1000 cabinet
WHT RED
80200 - 21
NC
NC
NC
NC
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