With IPHost Network Monitor you can run simple snmp requests against a Avaya device in your network.
scGenMonTimeStamp
sc Gen Monitor Time Stamp
1.3.6.1.4.1.81.28.1.2.1.1.15
This attribute contains the value of sysUpTime at the time switch counters were calculated.
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IPHost Network monitor allows you to monitor scGenMonTimeStamp 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.