With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
mpanlDlciDiscByteAbit
mpanl Dlci Disc Byte Abit
This attribute counts the bytes which were discarded due to aBit turned off.
Back to Nortel-Magellan-Passport-MpaNetworkLinkMIB MIB page.
IPHost Network monitor allows you to monitor mpanlDlciDiscByteAbit 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 speech servers right now.