Das geht so:
$:~$ telnet fritz.box
Trying 192.168.178.1...
Connected to fritz.box.
Escape character is '^]'.
BusyBox v1.8.2 (2009-03-27 11:37:25 CET) built-in shell (ash)
Enter 'help' for a list of built-in commands.
ermittle die aktuelle TTY
tty is "/dev/pts/0"
Console Ausgaben...