With IPHost Network Monitor you can run simple snmp requests against a Avaya device in your network.
ipxCircStatus
ipx Circ Status
1.3.6.1.4.1.81.31.2.1.1.6
For adding and deleting Circuits. Deleting this row means deleting the corresponding entry in ipxCircTable. Deleting a Circuit also causes deletion of all static routes defined on this Circuit, as well as protocol Circuit (e.g. RIP and SAP) defined on this Circuit.
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IPHost Network monitor allows you to monitor ipxCircStatus on Avaya device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Avaya routers right now.