The Gateway peer cannot be contacted. Mediation server will keep trying; however additional failures will not be logged. ...

The Gateway peer cannot be contacted. Mediation server will keep trying; however additional failures will not be logged.

The Gateway peer, %1, is not responding to OPTIONS requests sent by the Mediation Server service
Cause: The Mediation Server service cannot communicate with the Gateway Peer Service over SIP due to network connectivity issues.
Resolution:
Please ensure network connectivity and availability of the Gateway Peer for the Mediation Server service to be able to function correctly.