With IPHost Network Monitor you can run simple snmp requests against a Avaya device in your network.
atmSwchPortSvcPtMptRootConns
atm Swch Port Svc Pt Mpt Root Conns
1.3.6.1.4.1.81.33.6.1.1.9
The number of switched virtual point to multipoint connections through this port, where this port is the point of entry for the call setup.
Back to ATMSWCH-MIB MIB page.
IPHost Network monitor allows you to monitor atmSwchPortSvcPtMptRootConns 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.