With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
appnDnaHgMHgAddrNumberingPlanIndicator
appn Dna Hg M Hg Address Numbering Plan Indicator
This attribute specifies the Numbering Plan Indicator (NPI) of the Dna that is entered. The address may belong to the X.121 or E.164 numbering plans.
Back to Nortel-Magellan-Passport-AppnMIB MIB page.
IPHost Network monitor allows you to monitor appnDnaHgMHgAddrNumberingPlanIndicator 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.