With IPHost Network Monitor you can run simple snmp requests against a Avaya device in your network.
scEthPortLower32OctetsRec
sc Eth Port Lower32 Octets Rec
1.3.6.1.4.1.81.28.2.1.1.1.36
Lower 32 bit conter of the total number of octets of data received by the port.
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IPHost Network monitor allows you to monitor scEthPortLower32OctetsRec 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.