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

Issue:

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:

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

 

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Cause:

As the error message mention, RTCP active calls must be false if bypass is enabled and refer support is disabled,

RTCP active calls can’t be modified from the Lync Control panel, you need to open Lync management shell to configure it as false

Solution:

in the below example, my Trunk name is: PstnGateway:10.0.0.20

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

 

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

Get-CsTrunkConfiguration -Identity PstnGateway:10.0.0.20

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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:

Set-CsTrunkConfiguration –identity PstnGateway:10.0.0.20 –RTCPActiveCalls $false –RTCPCallsonHold $false

You will be prompted to set EnableSessionTimer as true, to do so, run the below command

Set-CsTrunkConfiguration –identity PstnGateway:10.0.0.20 –EnableSessionTimer $true

 

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– Now lets check the status again:

Get-CsTrunkConfiguration -Identity PstnGateway:10.0.0.20

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Now you can Enable Media Bypass on the Newly Created Trunk

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Commit to save, and it should complete successfully this time

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