With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
lpOamEnetOverrunErrors
lp Oam Enet Overrun Errors
This attribute indicates the number of frames known to be lost because the local system bus was not available. This counter wraps to zero when it exceeds its maximum value.
Back to Nortel-Magellan-Passport-OamEthernetMIB MIB page.
IPHost Network monitor allows you to monitor lpOamEnetOverrunErrors 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.