With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
dsgIfChannelDsFreq
dsg If Channel Ds Freq
The DOCSIS downstream center frequency. The receive frequency MUST be a multiple of 62500Hz.
Back to DSG-IF-MIB MIB page.
IPHost Network monitor allows you to monitor dsgIfChannelDsFreq on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.