With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
rtgDpnConStatsTable
rtg Dpn Con Stats Table
This group of attributes provides statistics about the behavior of the DpnAddressPlan component. The statistics concern the distribution of routing information, required to support the routing of DPN traffic, to all Passport nodes in the RID subnet.
Back to Nortel-Magellan-Passport-DpnRoutingMIB MIB page.
IPHost Network monitor allows you to monitor rtgDpnConStatsTable 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.