The Mediation Server service has encountered a major internal problem that may be causing it to fail calls. Cause: Check ...

The Mediation Server service has encountered a major internal problem that may be causing it to fail calls.

Cause: Check other MOM alerts for more details. CALLS_REJECTED_DUE_TO_LOAD and the LOAD_CALL_FAILURE_INDEX counter are examples of counters that signal overload conditions.  The MEDIATIONSERVER_UNEXPECTED_EXCEPTION (Event ID: 25018) and MEDIATIONSERVER_UNEXPECTED_SIGNALING_EXCEPTION (Event ID: 25027) are examples of events that signal internal error conditions.
Resolution:
If the cause for the alarm is an overload condition, consider deploying additional Mediation Servers in this cluster.  If the cause is due to an unexpected exception, consider restarting the service.

The Mediation Server service has encountered a major call completion problem with the proxy peer. Proxy Peer FQDN: %1 Cause: ... The Mediation Server service has encountered a major call completion problem with these gateway peer(s). Affected PSTN Gateway ... The Mediation Server service has encountered a major connectivity problem with the proxy peer. Proxy Peer FQDN: %1 Cause: ... The Mediation Server service has encountered a major connectivity problem with these gateway peer(s). Affected PSTN Gateway ... The Mediation Server service has encountered a major internal problem that may be causing it to fail calls. Cause: Check ... The Mediation Server service has encountered a major MRAS connection problem with the proxy peer. Cause: The MEDIATIONSE ... The Mediation Server service has encountered a major problem with its configurations. Cause: Check the following MOM alerts ... The Mediation Server service has received a call that does not support comfort noise. This event is throttled after 5 calls ... The Mediation Server service startup is pending as configuration database is not yet available. Cause: Possible local configuration ...