With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
gsmBcRlpInvalidFrames
gsm Bc Rlp Invalid Frames
This attribute counts the number of invalid frames received. These invalid frames are frames received from the mobile which contain errors in the header information. This count does not include the number of frames with Cyclic Redundancy Check (CRC) errors or out-of-sequence Frame Errors. The counter wraps when it exceeds the maximum value.
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IPHost Network monitor allows you to monitor gsmBcRlpInvalidFrames 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 multiplexers right now.