With IPHost Network Monitor you can run simple snmp requests against a Avaya device in your network.
itrGroupTable
itr Group Table
1.3.6.1.4.1.81.21.3.1
Table of attributes pertaining to the ITRE module.
Back to MODULES-MIB MIB page.
IPHost Network monitor allows you to monitor itrGroupTable 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.