With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
dlswTConnStatCloseIdles
dlsw T Connection Statistics Close Idles
1.3.6.1.4.1.2011.2.34.2.1.2
The number of times transport connections in this node exited the connected state with zero active circuits on the transport connection.
Back to DLSW-MIB MIB page.
IPHost Network monitor allows you to monitor dlswTConnStatCloseIdles 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.