With IPHost Network Monitor you can run simple snmp requests against a Avaya device in your network.
clGroupTestClocks
cl Group Test Clocks
1.3.6.1.4.1.81.16.1.1.1.4
A value ON of this attribute indicates that a test should be performed on all clock ports.
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IPHost Network monitor allows you to monitor clGroupTestClocks 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.