Bad Blue Bull <ibmbull@yandex.ru> writes:

Hi,

 *debug tramp/telnet nicolas@192.168.0.141* attached

Thanks.

 ;; Emacs: 28.0.50 Tramp: 2.5.0-pre -*- mode: outline; -*-
 ;; Location: /usr/local/share/emacs/28.0.50/lisp/net/tramp.elc Git: /
 01:20:29.358056 tramp-send-command (6) # exec telnet 192.168.0.141 2>/dev/null
 01:20:32.454828 tramp-process-actions (6) #
 Trying 192.168.0.141...

Unfortunately, Tramp calls telnet with redirection of stderr, so we
don't see what's the problem. What happens, if you call in a local shell

# telnet 192.168.0.141

Pls show all messages.

Best regards, Michael.