With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
frDteLmiErrorThreshold
Frame Relay Dte Lmi Error Threshold
The number of errors detected within the monitored events window before declaring the link non-functional. This field corresponds to the parameter N392 described in the ANSI T1.617-1991 Annex D.
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IPHost Network monitor allows you to monitor frDteLmiErrorThreshold 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.