With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
vctDnaIncomingOptionsTable
VC Tester Dna Incoming Options Table
1.3.6.1.4.1.562.2.4.1.5130.2.12
IncomingOptions defines set of options for incoming calls. These options are used for calls arriving to the interface represented by Dna. For calls originated from the interfasce, IncomingOptions attributes are not used.
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IPHost Network monitor allows you to monitor vctDnaIncomingOptionsTable 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 secure routers right now.