SIP TRUNK strange behaviour

Unanswered Question
Apr 28th, 2010

I have SIP trunk to my GW connected to PSTN.

I noticed strange issue which is when i call somebody on his mobile phone and his phone is closed or out of coverage I hear ringback tone instead of PSTN normal messages.

I have CUCM 6.1.3

any ideas..


Ahmed Kamal

I have this problem too.
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gogasca Thu, 05/06/2010 - 19:29

Do you have SIP Trunk to PSTN?

Or which type of connection to PSTN you use?

sometimes Telco sends instead of alerting a progress message with progress tones

Are we suppose to hear VM right or out of service?

Which type of GW?

Which IOS version



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