The Telnet protocol provides a standardized interface that enables terminal devices and terminal-oriented processes on hosts that support TCP/IP to communicate with each other. The TSO TELNET command runs the MVS™ Telnet client that enables you to log on to a remote host from TSO as though you are directly attached to that host. This client supports the Telnet 3270 protocol. The MVS Telnet client does not run in the z/OS UNIX environment.

Connecting to the z/OS UNIX Telnet server from any client results in a session with the z/OS shell as if the user had entered UNIX System Services from TSO in line mode or character mode. Once the z/OS UNIX Telnet session has been established, you can enter any UNIX System Services command that can be issued from within the z/OS shell.

See Logging on to a host using TELNET for more information about TELNET.