With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
traceRcvrX25DnaDefaultSendToNetworkThruputClass
trace Receiver X25 Dna Default Send To Network Thruput Class
1.3.6.1.4.1.562.2.4.1.106.2.2.2.13.1.6
This attribute specifies the default send throughput class (towards the network) for all calls using this particular Dna.
Back to Nortel-Magellan-Passport-X25TraceRcvrMIB MIB page.
IPHost Network monitor allows you to monitor traceRcvrX25DnaDefaultSendToNetworkThruputClass 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.