With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
traceSessionX25VcType
trace Session X25 Vc Type
1.3.6.1.4.1.562.2.4.1.106.3.2.2.10.1.1
This attribute displays the type of call, pvc or svc. type is provided at provisioning time.
Back to Nortel-Magellan-Passport-X25TraceRcvrMIB MIB page.
IPHost Network monitor allows you to monitor traceSessionX25VcType 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.