Why aren't my Panasonic IP Phone extensions working?
- BBrendan FloydSep 23, 2025
If your Panasonic IP Phone extensions (excluding IP-PT/SIP Extensions) are not working, the extension card may be faulty and need replacement. Check the connection between the PBX and the extension by plugging the extension into the same port with a short cord. If it works, repair the connection. Ensure a 2-wire cord is used and the A-A1 relay switch is in the 'OUT' or 'OFF' position if using a telephone with an A-A1 relay. Test the extension in a working port; if it still fails, replace it. Finally, ensure the PSU is the correct type.
























