With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cmFailedDialAttempts
cm Failed Dial Attempts
1.3.6.1.4.1.9.9.47.1.3.3.1.6
A counter that indicates the number of call attempts that failed because the modem didn't go off hook, or there was no dial tone.
Back to CISCO-MODEM-MGMT-MIB MIB page.
IPHost Network monitor allows you to monitor cmFailedDialAttempts on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.
