I'm using a 1760 router with 1 FWO port, and a PVDM of 256.
The FXO ports are connected to a PABX with 4 extensions. And three of them are working correctly. The fourth one is not receiving any call when using the extension. And when conncting the PABX directly to an analog phone, it receives the call.
What can be the problem ?
To be clearer, only one port is not receiving the call, and sometimes the same port works with another extension.
Any suggestion ?