RTCP active calls must be false if bypass is enabled and refer support is disabled Error

Reblog for your favorite post…

Ibrahim Soliman Blog


In Lync Server 2010 While configuring a trunk to enable media bypass, and disable (un-enable) the refer support (as the recommended settings when creating a SIP trunk to Cisco Unified Communications Manager CUCM), you may receive the below error when you try to commit changes:





in the below example, my Trunk name is: PstnGateway:

– in the trunk prosperities, Temporarily un-enable the media bypass, and commit to save changes:


– Now, let’s open Lync Management shell and check the status of RTCP Active Calls, and RTCP Calls on hold:


We see both are True by default, Also note the EnableSessionTimer status is False.

– Now, run the below commands to set RTCPActiveCalls and RTCPCallsonHold as false:


– Now lets check the status again:



Commit to save, and it should complete successfully this time


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