I have the classic disconnect problem and with all the terrible bytes on the internet have be unable to find the appropriate solution.
If i ring the PSTN line connected to the FXO port i have PLAR directing the call to 1000 my Reception phone. Im in Australia and the cptone is set to AU.
I have tried different voice class's but i am not getting anywhere. i recorded the disconnect tone from CIPC and i believe the frequency is 400, and the cadence is 380. I inserted a custom class and linked i to my voice port 1/1/0 but with no joy.....
Anyone got any ideas.....
I'm not sure what they mean by a 'known problem'. Loop start operation has been around in one way or another for over a hundred years, and any specific problems would have been sorted out a long time ago. It was designed for connecting telephone handsets and the idea has always been that the people say 'goodbye' and then physically hang up towards the network. In this sense the disconnect supervision is controlled by the people on the phone call. The telephone network NEVER hangs up towards the users - it signals the far end disconnect by battery reversal or disconnect tones.
There is no reason why this should not work with disconnect tones. The next suggestion would be to get a wireshark trace of the call and then hang up the PSTN side. This will capture all the call signaling and the audio from the gateway
Groundstart is unheard of outside of North America. Telstra/Optus can supply an analogue loopstart trunk or ISDN BRI for low density connections.
under the voice-port, add these commands -
timeouts call-disconnect 3
timeouts wait-release 3
This should drop the time to drop the call down to about 5-6 seconds after the tones are initially detected
Don't use any value lower than this as the call disconnection may become unreliable.