With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
x25DteRgLtPeerValue
x25 Dte Rg Lt Peer Value
1.3.6.1.4.1.562.2.4.1.90.7.211.1.1
This variable represents both the value and the index for the x25DteRgLtPeerTable.
Back to Nortel-Magellan-Passport-X25DteMIB MIB page.
IPHost Network monitor allows you to monitor x25DteRgLtPeerValue 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.