With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cwrRfStatus
Cisco Wireless Rf Status
1.3.6.1.4.1.9.9.136.1.5.1.1.15
This object specifies whether the RF resource is functioning properly or not. If it is functioning properly then it will be online(1), else offline(2).
Back to CISCO-WIRELESS-IF-MIB MIB page.
IPHost Network monitor allows you to monitor cwrRfStatus on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.