With IPHost Network Monitor you can run simple snmp requests against a Avaya device in your network.
chPluginList
ch Plugin List
1.3.6.1.4.1.81.7.21
The function of this variable is to summarize the information concerning the presence of the expansion module and the expansion module type for each slot of the stack. The information is coded as follow: First Octet: number of slots Second Octet: SNMP Type of information: Integer=2, OctetString=4 Third Octet: Length of each field Last Octets: For each slot, if no expansion module is present, the value will be 0; otherwise, the plug-in-type-number (written in number of octets described in the 3rd octet)
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IPHost Network monitor allows you to monitor chPluginList 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.