With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
rttMonCtrlAdminTag
Round Trip Time Monitor Control Admin Tag
1.3.6.1.4.1.9.9.42.1.2.1.1.3
A string which is used by a managing application to identify the RTT target. This string is inserted into trap notifications, but has no other significance to the agent.
Back to CISCO-RTTMON-MIB MIB page.
IPHost Network monitor allows you to monitor rttMonCtrlAdminTag 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.