With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
voicePortCallManagerIpAddr
voice Port Call Manager Ip Address
1.3.6.1.4.1.9.5.1.26.2.1.4
can register up to 5 call managers.
Back to CISCO-STACK-MIB MIB page.
IPHost Network monitor allows you to monitor voicePortCallManagerIpAddr 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.