With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
pppFramerOverruns
ppp Framer Overruns
1.3.6.1.2.1.10.23.5.13.1.7
This attribute counts the total number of frames received from the link for which overruns occurred.
Back to Nortel-Magellan-Passport-PppMIB MIB page.
IPHost Network monitor allows you to monitor pppFramerOverruns 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.