With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
ipivcDnaIncAccess
ipivc Dna Inc Access
This attribute is an extension of the Closed User Group (CUG) facility, as follows: This attribute, if set to a value of allowed indicates that incoming calls (from the network to the DTE) from the open (non-CUG) part of the network are permitted. It also permits incoming calls from DTEs that have Outgoing Access capabilities. 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 corresponds to the CCITT 'Closed User Group with Incoming Access' feature for DNAs in that incoming access is granted if this attribute is set to a value of allowed.
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IPHost Network monitor allows you to monitor ipivcDnaIncAccess 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.