With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
csCugIndex
Cisco ATM Switch Closed User Group Index
1.3.6.1.4.1.9.9.89.1.3.1.1
This maps to cug index of ITU spec. For each interface, there is a unique cug index for each interlock code. This object is valid only when CUGs are supported on a per-call basis.
Back to CISCO-ATM-SWITCH-CUG-MIB MIB page.
IPHost Network monitor allows you to monitor csCugIndex 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.