With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
tn3270sStatsDisconnects
tn3270s Stats Disconnects
1.3.6.1.4.1.9.9.54.1.2.1.1.6
Total number of TN3270 sessions disconnected.
Back to CISCO-TN3270SERVER-MIB MIB page.
IPHost Network monitor allows you to monitor tn3270sStatsDisconnects 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.