I have all calls arriving on FXO ports go to Unity for Auto Attendant Capabilities. What happens is if I start listening to the Unity Conversation and I hang up the call for some reason the FXO remain open for a long period of time. Also if I get transfer to a subscriber and I reach the subscriber VoiceMail and I hang up the call, the line also remains open for a long period of time. That doesn't happen if I'm oonnected to an IP Phone and then I hang up the call then the FXO port is available in a resonable time.
I got the following command in the FXO port of the router. I don't know if I'm missing something else on the router, CCM or even Unity..
Re: FXO Remains Busy after PSTN user hangs up Call
Sounds like you are having a supervision issue with calls coming from the PSTN. Correct me if I am wrong, scenario is PSTN caller -> FXO Port -> Unity.
Your PSTN lines are probably loop start lines. I would convert them to ground start lines. Ground start provides the supervision on analog lines and eliminates the long wait after a PSTN caller hangs up.
IntroductionCUCM Routing RulesDial String implementation PolicyCUCM Routing LogicSIP URI Call Routing Analysis+++ Case Study: 1 ++++++ Case Study: 2 +++Conclusion
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