With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
dataSigChanNisFramerLargeFrmErrors
data Sig Chan Nis Framer Large Frm Errors
This attribute counts the total number of frames received which were too large. The frame was longer than 500 bytes. This count wraps to zero after reaching its maximum value.
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IPHost Network monitor allows you to monitor dataSigChanNisFramerLargeFrmErrors 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.