With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
sigChanNisT23
sig Chan Nis T23
1.3.6.1.4.1.562.2.4.1.115.8.11.1.1
This attribute specifies the layer 2 enable request timer.
Back to Nortel-Magellan-Passport-VnetNisSigMIB MIB page.
IPHost Network monitor allows you to monitor sigChanNisT23 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.