When you use the TSO TELNET command you are running a Telnet client to connect to a remote host running a Telnet server. The data that is displayed on your terminal is managed by the Telnet client, which communicates using TCP/IP with the Telnet server at the remote host. As a result, the operation of your terminal can differ from what you are used to seeing when you are directly logged on to TSO or to another MVS™ application. For example, the remote host might be running UNIX, VM, or another operating system that provides a Telnet server. You need to use the terminal operation procedures of the remote host operating system while you have a TELNET session with that remote host.

TELNET management of your terminal for the remote host can also cause operational differences. For example, the function keys that are described in Using the TELNET function keys can result in different actions.

When all of the display data does not fit on your screen, Linemode displays the HOLDING message in the lower right corner of your screen. If this message appears, press the CLEAR key to see the rest of the data.

Session ended.  <ENTER> to return to TSO.

If you invoke the services of the MVS Telnet 3270 server from a Telnet client that is not Telnet 3270 capable, you cannot use applications in full-screen mode. Once in line-mode, all nested Telnet sessions continue to be line mode. If you use TELNET in line-mode to access an MVS or VM TELNET server, all subsequent nested TELNET requests are automatically connected in line-mode as a start-stop TTY terminal, and transparent (full-screen) operations are not possible.

TELNET terminated -- Foreign host is no longer responding