Forwarding with SIP Trunking and Retaining CID

Unanswered Question
Sep 17th, 2010
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We are using SIP trunking to get to the PSTN and CUCM 7.1.  The SIP provider only permits calls originating from their own DIDs.

So how can we allow our users to forward all calls to say their cell phone.  AND when a call comes in we want them to be able to see the original caller ID. Is it possible?  What is the mojo?  Thanks!

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