With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
gsmBcV110FramesDiscarded
gsm Bc V110 Frames Discarded
This attribute counts the number of frames discarded, on a per-call basis, in the receive direction by software due to frame errors. The counter wraps when it exceeds the maximum value.
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IPHost Network monitor allows you to monitor gsmBcV110FramesDiscarded 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.