With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
appnDlciBnnLsDefDspuService
appn Dlci Bnn Ls Define Dspu Service
This attribute specifies which down stream physical unit service is supported on this Link Station.
Back to Nortel-Magellan-Passport-AppnMIB MIB page.
IPHost Network monitor allows you to monitor appnDlciBnnLsDefDspuService 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 switches right now.