With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
isdnLapdOperStatus
isdn Lapd Operational Status
1.3.6.1.2.1.10.20.1.3.4.1.2
The operational status of this interface: inactive all layers are inactive l1Active layer 1 is activated, layer 2 datalink not established l2Active layer 1 is activated, layer 2 datalink established.
Back to ISDN-MIB MIB page.
IPHost Network monitor allows you to monitor isdnLapdOperStatus 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.