telnet unset
Turns off previously set options. Windows commands reference
On Windows
Windows
u {bsasdel | crlf | delasbs | escape | localecho | logging | ntlm} [?]
Turn off logging.
u loggingbsasdelSends backspace as a backspace.crlfSends the Enter key as a CR. Also known as line feed mode.delasbsSends delete as delete.escapeRemoves the escape character setting.localechoTurns off localecho.loggingTurns off logging.ntlmTurns off NTLM authentication.?Displays help for this command.