With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
sonetVTIntervalTable
sonet VT Interval Table
1.3.6.1.2.1.10.39.3.1.2
The SONET/SDH VT Interval table.
Back to SONET-MIB MIB page.
IPHost Network monitor allows you to monitor sonetVTIntervalTable on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.