With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cIfXcvrMonDigitalDiagVoltAlarm
Cisco Interface Xcvr Monitor Digital Diag Volt Alarm
1.3.6.1.4.1.9.9.706.1.3
The current status of voltage alarm flag on the voltage sensor of the transceiver in the interface.
Back to CISCO-INTERFACE-XCVR-MONITOR-MIB MIB page.
IPHost Network monitor allows you to monitor cIfXcvrMonDigitalDiagVoltAlarm on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.