When you are connected to a System i™ platform, signing off does not necessarily end your Telnet server session. To end the session, enter a key or sequence of keys to put the Telnet client into a local command mode. You can then type the command to end the session.
If you do not know what key or key sequence causes the client to enter command mode, consult either your system administrator or your Telnet client documentation.
You can also use the end connection (ENDCNN) parameter of the SIGNOFF command to sign off the system and end the Telnet connection. For example, SIGNOFF ENDCNN(*YES) returns you to the client system (if you only have one Telnet session established). Or, if you have more than one Telnet session established, the command returns you to the previous system.