With IPHost Network Monitor you can run simple snmp requests against a Avaya device in your network.
promHuntGroupIndex
prom Hunt Group Index
1.3.6.1.4.1.2167.5.4.1.1.1
An index that uniquely identifies this hunt group. This index corresponds to the value of promResourceIndex for resources of the hunt group type.
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IPHost Network monitor allows you to monitor promHuntGroupIndex 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.