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Lync call to Telepresence Endpoint not OK

Hi,

 

I have the following problem that I can´t make call from  Telepresence Endpoint to lync client if I make a SIP call - using H323 the call is fine.

I have  LYNC - VCS Expressway - CUCM - VCS-C  - SX20 Endpoint

Call setup is going through, but the call cannot be astablished. If I make the call with H323 its working fine.

 

Where can I make traces? Does anyone had the same problem?

Need help

 

Thanks

Klaus

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