Problem regarding ringback with sip trunk

Unanswered Question
May 21st, 2010
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I've a problem with ringback on SIP trunk between Call Manager and a GSM gateway.

That is when i call from a Cisco Phone a device located in GSM Cloud I don't hear the ringback.

I've done a search on the web and the solution seems to be checking "Disabling Early Detection..." on SIP Profile...

Any suggests from you?

Best regards.


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