With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ccmeEphoneDnChStatsHistoryTable
Cisco Call Manager Express Ephone Dn Channel Statistics History Table
1.3.6.1.4.1.9.9.439.1.3.1
A list of statistics for all Ephone-DN's (lines) on this device.
Back to CISCO-CCME-MIB MIB page.
IPHost Network monitor allows you to monitor ccmeEphoneDnChStatsHistoryTable 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.