With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
lineBlockDs0Count
line Block Ds0 Count
1.3.6.1.4.1.351.110.4.7.3.1.5
This is the number of blocked ds0s on this line.
Back to CISCO-VISM-DSX0-MIB MIB page.
IPHost Network monitor allows you to monitor lineBlockDs0Count 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.