NEC NEC-80570 User Guide - Page 31

Power Failure Telephone 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): q 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. BLK BLUE GRN 80200 - 21 To PFT/MDM in DS1000 cabinet NC NC NC NC YEL WHT RED PFT PFR Power Failure Telephone WHT-BLU GRN BLU-WHT RED 4 BLK YEL 625 Modular Jack Power Failure Telephone Figure 4-4: Connecting a Power Failure Telephone DS1000 Hardware Manual Section 4: Optional Equipment x 4-7