FXO port not going back onhook when call goes to CUC Voice mail.
Quiet new to the voice world and have just set up a home lab and have run into the following problem.
When a call comes in from the PSTN and gets transferred to voicemail CUC, when the caller has left the message and hung up the FXO port on my Cisco 3825 does not go back on hook
If a call comes in from the PSTN and is answered on a phone registered to the CUCM and the internal user hangs up the FXO port goes back on hook but if the caller hangs up the FXO port does not go back on hook.
Re: FXO port not going back onhook when call goes to CUC Voice m
The router DSP port is not able to detect the disconnect tone sent by provider that is why FXO port is remaining off hook. When call is answered by IP phone then IP phone user can listen the disconnect tone when PSTN caller disconnectes the call and they will hang up the call so gateway is aware that call is disconnected and moves the port to ON hook state but CUE cannot understand the tone so it keeps the call active. To resolve the issue we ave to configure custom CPTONE. Kindly collect PCM capture for a test call. Disable capture after call is disconnected by PSTN caller. i have attached the document. Use the method according to your IOS version.
Using PCM capture we can findout the exact frequency and cadence of the disconnect tone sent by provider.
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The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.