Nortel 2000 Software Reference Manual page 227

Book C Chapter 3 Using the CLI Commands
If you enter the command without arguments, telnet enters command
mode and displays the Telnet prompt. After connecting to the remote
host, telnet prints a message called a connect banner, which displays the
Telnet escape character. If pressed, the Telnet escape character returns
you to the telnet prompt, where you can enter telnet commands. For
example:
annex: telnet topsy
Trying...
Connected to topsy
Escape character is "^]".
4.3 BSD UNIX (topsy)
login:
After establishing the connection, telnet is in input mode. Input mode
supports either character-at-a-time or line-by-line mode. In
character-at-a-time mode, the Remote Annex immediately sends each
typed character to the host, where character echoing and line editing
occur.
In line-by-line mode, the Remote Annex retains input until you press
either Return or an interrupt character. In this mode, character echoing
and line editing are performed locally at the Remote Annex. Using the
telnet mode command, you can change both the mode and where echoing
occurs.
You can send a Break to the remote host by using either the regular break
or the long break key. This allows you to send a Break sequence using
a local break, rather than using the Telnet send brk command. To do this,
you must turn off the regular and/or long break as the CLI attention
character (see stty on page A-194).
Remote Annex Administrator's Guide for UNIX
Book C-209