How to troubleshoot Panasonic KX-TDA100 PBX extension not working?
- SSonya LeeSep 18, 2025
If the extension does not operate, it could be due to several reasons: a bad extension card, a bad connection between the Hybrid IP-PBX and telephone, a telephone with an A-A1 relay connected, a bad telephone, or the wrong type of PSU. Here are some steps to troubleshoot: * Exchange the card for a known working one. * Plug the telephone into the same extension port using a short telephone cord. If it works, repair the connection between the Hybrid IP-PBX and the telephone. * Use a 2-wire cord or set the A-A1 relay switch of the telephone to the "OUT" or "OFF" position. * Plug the telephone into another working extension port. If it still doesn't work, replace the telephone. * Replace the PSU with the appropriate type.




















