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Dropped Lync Calls after approximately 50 minutes

Problem:

Lync calls are dropping after approximately 50 minutes on all calls

Solution:

This is most likely a configuration issue.

Please modify the CSTrunkConfiguration on the Lync server to have the following:

by default, Lync has it set to:

EnableSessionTimer = False

RTCPActiveCalls = True


RTCPCallsOnHold = True

so if they changed it to:

EnableSessionTimer = True

RTCPActiveCalls = False

RTCPCallsOnHold = False

they should be ok

Here's some info on what those options mean.

RTCPActiveCalls

This parameter determines whether RTCP packets are sent from the PSTN gateway, IP-PBX, or SBC at the service provider for active calls. An active call in this context is a call where media is allowed to flow in at least one direction. If RTCPActiveCalls is set to True, the Mediation Server or Lync Server client can terminate a call if it does not receive RTCP packets for a period exceeding 30 seconds.

Note that disabling the checks for received RTCP media for active calls in Lync Server elements removes an important safeguard for detecting a dropped peer and should be done only if necessary.

Default: True

RTCPCallsOnHold

This parameter determines whether RTCP packets continue to be sent across the trunk for calls that have been placed on hold and no media packets are expected to flow in either direction. If Music on Hold is enabled at either the Lync Server client or the trunk, the call will be considered to be active and this property will be ignored. In these circumstances use the RTCPActiveCalls parameter.

Note that disabling the checks for received RTCP media for active calls in Lync Server elements removes an important safeguard for detecting a dropped peer and should be done only if necessary.

Default: True

EnableSessionTimer

Specifies whether the session timer is enabled. Session timers are used to determine whether a particular session is still active.

Note that even if this parameter is set to False, session timers can be applicable if the remote connection has session timer enabled. In such a case, the Mediation Server will reply to session timer probes from the remote entity.

Default: False


Properties ID: 000357   Views: 3208   Updated: 5 years ago
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