With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cwrHistMax
Cisco Wireless History Max
1.3.6.1.4.1.9.9.136.1.7.2.1.3
This object represents the maximum value of the data sample seen for this histogram.
Back to CISCO-WIRELESS-IF-MIB MIB page.
IPHost Network monitor allows you to monitor cwrHistMax 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.