With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
traceSessionX25VcCalledNpi
trace Session X25 Vc Called Npi
1.3.6.1.4.1.562.2.4.1.106.3.2.2.10.1.6
This attribute displays the Numbering Plan Indicator (NPI) of the called end.
Back to Nortel-Magellan-Passport-X25TraceRcvrMIB MIB page.
IPHost Network monitor allows you to monitor traceSessionX25VcCalledNpi 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 speech servers right now.