With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
gvcIfDnaIncSameService
General Vc Interface Dna Inc Same Service
This attribute, if set to a value of allowed indicates that incoming calls from the same service type (e.g.: X.25, ITI, SNA) (from the network to the DTE) be made to this Dna. If set to a value of disallowed, then such calls cannot be made to this Dna - such calls will be cleared by the local DCE. This attribute is ignored if the corresponding attribute, incCalls is set to a value of disallowed.
Back to Nortel-Magellan-Passport-GeneralVcInterfaceMIB MIB page.
IPHost Network monitor allows you to monitor gvcIfDnaIncSameService 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.