With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
btdsLCoPathFailureCount
btds L Co Path Failure Count
This attribute is the count of the number of times the path has successfully connected. It is set to zero the first time the path is up. If a path fails anytime after connecting this count will be incremented when the path is up again. Failed route requests do not count in this statistic. See retryCount above. This attribute stops counting at its maximum value.
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IPHost Network monitor allows you to monitor btdsLCoPathFailureCount on Allied Telesis device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Nortel speech servers right now.