With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
x25DtePeerLcnTable
x25 Dte Peer Logical Channel Number Table
1.3.6.1.4.1.562.2.4.1.90.2.209
This attribute specifies the local logical channel numbers (Lcn) in use for the X.25 calls to the remote host identified by this Peer component.
Back to Nortel-Magellan-Passport-X25DteMIB MIB page.
IPHost Network monitor allows you to monitor x25DtePeerLcnTable 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.
