With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cwrTlValueIndex
Cisco Wireless Tl Value Index
1.3.6.1.4.1.9.9.136.1.8.4.1.1
This object, along with ifIndex and cwrTlIndex, is the index into the timeline data table.
Back to CISCO-WIRELESS-IF-MIB MIB page.
IPHost Network monitor allows you to monitor cwrTlValueIndex 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.