We have some problems with the call disconnection on a FXO ports in CCME 7.1 environment. We have a 2N Analog-GSM gateway attached to a FXO port, and the CCME did not recognise the disconnect tone, so the call was never disconnect (you had to end the call manually). We solved this problem analyzing the discconnect tone an creating a custom cptone:
voice class custom-cptone 2n-gsm dualtone disconnect frequency 425 cadence 330 330 !
Although it works, now we have detected a minor problem: the call takes about 2-3 seconds to be disconnected, so when someone is recording a message in the voicemail it records the disconnect tone during 2-3 seconds at the end of the message. I have changed the timeouts values with no results. Does anybody know how to fix it?
This is due to a disconnect suppervision problem, there are several ways to indicate to the FXO port that the calls is been disconnect. The best way to solve this will be contact your service provider and ask them witch method they are using but must of the times they do not know that.
This is a very helpful document that explains each metoth and how to troubleshoot them and the proper configuration that you should have to avoid this kind of issues.
BTW the best way to find out the method that you service provider is using is gathering the output of the "debug vpm singnal" there you will find that information
These are the paths to get to each CCX logs through CLI. They may be helpful if you are having issues accessing RTMT or downloading logs through it.
If you want to download them you have to prefix "file get " and you can add one of the options (re...