With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
x25DteLcnFastSelect
x25 Dte Logical Channel Number Fast Select
1.3.6.1.4.1.562.2.4.1.90.4.11.1.6
This attribute indicates whether the fast select was used in establishing this logical channel.
Back to Nortel-Magellan-Passport-X25DteMIB MIB page.
IPHost Network monitor allows you to monitor x25DteLcnFastSelect 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.