With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
trkSpdThRowStatus
trk Spd Th Row Status
This variable is used to control the addition and deletion of individual values of the trkSpdThTable.
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IPHost Network monitor allows you to monitor trkSpdThRowStatus 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.