With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
x25DteCugoaIndex
x25 Dte Cugoa Index
1.3.6.1.4.1.562.2.4.1.90.23.1.11
This attribute specifies the index of the Close User Group with Outgoing Access facility to signal. The index consists of two or four octets each representing a digit in the range of 0 to 9. A value of null (empty string) at the X.25 interface means no CUGOA facility is signalled. If a cugoaIndex is provisioned to be signalled, the cugIndex attribute must be null.
Back to Nortel-Magellan-Passport-X25DteMIB MIB page.
IPHost Network monitor allows you to monitor x25DteCugoaIndex 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 modems right now.