With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
isdnMibSignalingGroup
isdn Mib Signaling Group
1.3.6.1.2.1.10.20.3.2.3
A collection of objects required for ISDN D channel configuration and statistics.
Back to ISDN-MIB MIB page.
IPHost Network monitor allows you to monitor isdnMibSignalingGroup on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco optical switches right now.