With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cmRXAnalogSignalLevel
cm RX Analog Signal Level
1.3.6.1.4.1.9.9.47.1.3.1.1.17
The modem transmit analog signal level in the current or previous call. The unit used is in dBm. This object is valid for modems that have cmManageable set to true(1) otherwise 0 will be returned.
Back to CISCO-MODEM-MGMT-MIB MIB page.
IPHost Network monitor allows you to monitor cmRXAnalogSignalLevel on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco optical switches right now.