With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
traceSessionX25VcPriority
trace Session X25 Vc Priority
1.3.6.1.4.1.562.2.4.1.106.3.2.2.10.1.21
This attribute displays whether the call is a normal or a high priority call.
Back to Nortel-Magellan-Passport-X25TraceRcvrMIB MIB page.
IPHost Network monitor allows you to monitor traceSessionX25VcPriority 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.