With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cpmActiveModemPort
cpm Active Modem Port
1.3.6.1.4.1.9.10.19.1.3.1.1.7
Identification of modem resource allocated to call. This is the value of cmPortIndex from CISCO-MODEM-MGMT-MIB. This value along with cpmActiveModemSlot uniquely identifies a modem. Value is -1 if call does not utilize a modem.
Back to CISCO-POP-MGMT-MIB MIB page.
IPHost Network monitor allows you to monitor cpmActiveModemPort 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.
