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New Member

Incomming on FXO

My Ip phone is not getting disconnected when call disconect from other end.

I have configured MGCP on router, i have 4 FXO ports, and default i have loop start signaling confiured for voice port.

Hall of Fame Super Gold

Re: Incomming on FXO


Either you telco configure battery reversal on the line, or use tone-based disconnect supervision.

New Member

Re: Incomming on FXO

this is the dubug output of call proccess, i am going to try steps you have mentioned.

Hall of Fame Super Gold

Re: Incomming on FXO

No debug is needed, it's a well know problem. It is definitely avoided only using digital circuits.

Re: Incomming on FXO

Debug doesn't help much. If anything, it seems to imply that they're sending an 'A' digit when they disconnect.

This is very simple. Call an IP phone through the FXO. Hang up on FXO, not on IP phone. Listen to the stream after the PSTN user has hung up. If the provider plays funky tones, you'll need to disconnect on these tones.

I would start by making sure you've got the correct CPtone configured under the voice port, along with 'supervisory disconnect dual-tone midcall any' and 'supervisory disconnect'.

If there are no sounds, they're sending it via voltage, or none at all.


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