With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cefcModuleStatusLastChangeTime
Cisco Entity Field Replaceable Unit Control Module Status Last Change Time
1.3.6.1.4.1.9.9.117.1.2.1.1.4
The value of sysUpTime at the time the cefcModuleOperStatus is changed.
Back to CISCO-ENTITY-FRU-CONTROL-MIB MIB page.
IPHost Network monitor allows you to monitor cefcModuleStatusLastChangeTime on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.