With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
traceRcvrX25DnaAddressTable
trace Receiver X25 Dna Address Table
1.3.6.1.4.1.562.2.4.1.106.2.2.2.10
This group contains attributes common to all Dnas. This group is composed of two attributes which define a Dna. These attributes are used to interpret the format of the address digits.
Back to Nortel-Magellan-Passport-X25TraceRcvrMIB MIB page.
IPHost Network monitor allows you to monitor traceRcvrX25DnaAddressTable 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.