With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ccmGroupMappingTable
Cisco Call Manager Group Mapping Table
1.3.6.1.4.1.9.9.156.1.1.3
The table containing the list of all CallManager to group mappings in a call manager cluster. When the local call manager is down, this table will be empty.
Back to CISCO-CCM-MIB MIB page.
IPHost Network monitor allows you to monitor ccmGroupMappingTable 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.
