With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
isdnBearerEntry
isdn Bearer Entry
1.3.6.1.2.1.10.20.1.2.1.1
Operational and statistics information relating to one port. A port is a single B channel.
Back to ISDN-MIB MIB page.
IPHost Network monitor allows you to monitor isdnBearerEntry on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco wireless switches right now.