With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
x25DteSnmpOperStatus
x25 Dte Snmp Operational Status
1.3.6.1.4.1.562.2.4.1.90.26.1.1
The current state of the interface. The up state indicates the interface is operational and capable of forwarding packets. The down state indicates the interface is not operational, thus unable to forward packets. testing state indicates that no operational packets can be passed.
Back to Nortel-Magellan-Passport-X25DteMIB MIB page.
IPHost Network monitor allows you to monitor x25DteSnmpOperStatus 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 multiplexers right now.