With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
alpsRemPeerConnLastRxAny
Cisco's Airline protocol support Remote Peer Connection Last Rx Any
1.3.6.1.4.1.9.9.95.1.2.4.1.12
The value of sysUpTime when a peer data or status message is last received across the ALPS remote peer connection.
Back to CISCO-ALPS-MIB MIB page.
IPHost Network monitor allows you to monitor alpsRemPeerConnLastRxAny on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco mobile switches right now.