With IPHost Network Monitor you can run simple snmp requests against a Avaya device in your network.
xsSubnetMatrixControlStatus
xs Subnet Matrix Control Status
The status of this xsSubnetMatrixControlEntry. An entry may not exist in the active state unless all objects in the entry have an appropriate value. If this object is not equal to active(1), all associated entries in the xsSubnetMatrixSDTable, xsSubnetMatrixDSTable shall be deleted by the agent.
Back to SMON2-MIB MIB page.
IPHost Network monitor allows you to monitor xsSubnetMatrixControlStatus 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.