With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
c3gGsmTotalByteReceived
Cisco 3G Gsm Total Byte Received
1.3.6.1.4.1.9.9.661.1.3.2.1.20
Total number of bytes received for all calls. It is the total number of bytes received by modem, not to be confused with the number of bytes received from the interface.
Back to CISCO-WAN-3G-MIB MIB page.
IPHost Network monitor allows you to monitor c3gGsmTotalByteReceived 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.