With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
gvcIfDnaCugOutCalls
General Vc Interface Dna Cug Out Calls
This attribute, if set to allowed indicates that outgoing calls (from the DTE into the network) be made using this particular Cug. If set to a value of disallowed, then outgoing calls cannot be made using this Cug - such calls will be cleared by the local DCE. This attribute corresponds to the CCITT 'Outgoing Calls Barred' feature for Cugs in that outgoing calls are barred if this attribute is set to a value of disallowed.
Back to Nortel-Magellan-Passport-GeneralVcInterfaceMIB MIB page.
IPHost Network monitor allows you to monitor gvcIfDnaCugOutCalls 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.