What to do if extensions don't work during power failure on Panasonic PBX?
- MMichael OlsenSep 12, 2025
If extensions connected to ports 1 to 4 of MSLC16/ SLC16 and ports 1 to 2 of DHLC8/SLC8 cards do not operate during a power failure, it could be due to a DPT or APT being connected to the extension port, or an incorrect dialling mode (tone or pulse). To resolve this, disconnect the DPT or APT and connect an SLT. Also, set the Tone/Pulse switch to the other position.













