The automatic trace-route feature monitors the following links for failures:
Server-to-media gateway: The link between the server acting as a gateway controller and any gateway. A link to a gateway that is in busy-out or disabled state is not a failed link.
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Server-to-IP trunks (H.323 signaling groups): The link between the server acting as a gatekeeper and any H.323 signaling group. Subsequent call failures using the same H.323 signaling group do not generate new log entries until that H.323 signaling group has successfully processed a call. The maintenance subsystem can also identify a failed link whenever any of these Error Types against the H323-SGRP maintenance object occur:
Error Type 257: ping test failures
Error Type 513: ping test excessive delay times
Error Type 770: excessive latency and packet loss from the Media Processor (maintenance object H323-SGRP Error type 770).
A link to an H.323 signaling group that is in busy-out or disabled state is not a failed link.
Note:
A call connection that is blocked from completion over a WAN link through the Call Admission Control Bandwidth Limitation feature is not a failed link and does not generate an automatic trace route over that link.
