What to do if Panasonic PBX extensions don't work during a power failure?
- KKevin KellerSep 18, 2025
During a power failure, if extensions connected to ports 1 to 4 of MSLC16/SLC16 and ports 1 to 2 of DHLC8/SLC8 cards on your Panasonic PBX aren't working, it could be due to a DPT or APT being connected to the extension port. Disconnect the DPT or APT and connect an SLT instead. Additionally, the dialing mode (tone or pulse) might be incorrect, so set the Tone/Pulse switch to the other position.
























