With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ciscoDlswTConnOperConnectTime
cisco Data Link Switching T Connection Operation Connect Time
1.3.6.1.4.1.9.10.9.1.2.3.1.5
The value of ciscoDlswUpTime when this transport connection last entered the 'connected' state. A value of zero means this transport connection has never been established.
Back to CISCO-DLSW-MIB MIB page.
IPHost Network monitor allows you to monitor ciscoDlswTConnOperConnectTime 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.