With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cm2400OrLessConnections
cm2400 Or Less Connections
1.3.6.1.4.1.9.9.47.1.3.3.1.10
The number of connections initially established at a modulation speed of 2400 bits per second or less. This object is valid only for modems which have cmManageable to be true.
Back to CISCO-MODEM-MGMT-MIB MIB page.
IPHost Network monitor allows you to monitor cm2400OrLessConnections on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.