With IPHost Network Monitor you can run simple snmp requests against a Avaya device in your network.
lstIntPortLostFrames
lst Int Port Lost Frames
1.3.6.1.4.1.81.19.4.1.1.1.13
Number of lost frames because of Back Pressure.
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IPHost Network monitor allows you to monitor lstIntPortLostFrames on Avaya device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Avaya IP phones right now.