With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
x21portSvcDlciLow
x21port Svc Dlci Low
1.3.6.1.4.1.351.110.5.1.1.1.3.1.1.14
This represents low end of reserved DLCI for SVC.
Back to CISCO-WAN-FR-X21-MIB MIB page.
IPHost Network monitor allows you to monitor x21portSvcDlciLow 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.