With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ccmCallManagerStartTime
Cisco Call Manager Call Manager Start Time
1.3.6.1.4.1.9.9.156.1.5.20
The last time the local call manager service started. This is available only when the local call manager is up and running.
Back to CISCO-CCM-MIB MIB page.
IPHost Network monitor allows you to monitor ccmCallManagerStartTime on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.