With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
tn3270sIndex
tn3270s Index
1.3.6.1.4.1.9.9.54.1.1.1.1.1
Index used to uniquely identify each tn3270 server instance. This index value shall not be reused when the server is shut down and a new instance invoked.
Back to CISCO-TN3270SERVER-MIB MIB page.
IPHost Network monitor allows you to monitor tn3270sIndex 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.