The TN3270E Telnet server
The TN3270E Telnet server (Telnet) provides access to z/OS® VTAM® SNA applications on the MVS™ host using Telnet TN3270E, TN3270, or linemode protocol. Telnet acts as an interface between IP and SNA networks. End users in an IP network connect to Telnet, which is also a VTAM application. Telnet activates one SNA application minor node logical unit (LU) to represent each Telnet IP client. The Telnet application LU establishes a session with a VTAM host application (for example, CICS® or TSO), simulating a terminal (LU0 or LU2) or a printer (LU1 or LU3). To enable connections, you must modify the VTAM and Telnet configuration data sets with Telnet statements. These statements describe Telnet server characteristics, the Telnet LUs, a listening port, and the characteristics of that port. After Telnet is started, you can use VARY and DISPLAY commands that are specifically related to Telnet to alter the state of Telnet or to display information about Telnet. For more information about these command sets, see z/OS Communications Server: IP System Administrator's Commands.
