With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
x25DteLapbTxQResetThreshold
x25 Dte Lapb Tx Q Reset Threshold
1.3.6.1.4.1.562.2.4.1.90.5.10.1.12
This attribute specifies the threshold of the number of higher layer packets queued, beyond which LAPB should initiate an overload alarm and reset the link. A value of 65536 means no threshold.
Back to Nortel-Magellan-Passport-X25DteMIB MIB page.
IPHost Network monitor allows you to monitor x25DteLapbTxQResetThreshold 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 switches right now.