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Strange SIP error

We have a working SIP Trunk with a SIP provider. For mobile traffic we have configured a Quescom gateway wich only handles traffic to predefined cell phone numbers. If a cell number is not configured in the quescom it has to fall back to the SIP connection. If this is the case we have one way audio! If i call the cell number directly without intervention of the Quescom the problem does not occure. I have some debugs of the SIP messages attached. I don't see anything strange.

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Re: Strange SIP error

You can try CSCsa65535 and it is eems like a config issue. For further troubleshooting, please give us the snippet of the SIP Trunk with a SIP provider config.

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