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Escape character and Esc key
When Telnet is first started, the utility advises that the Escape character is ‘Ctrl+]’. Many
SIS commands include the keyboard <Esc> key. Consequently, some confusion may exist
between the Escape character and the Escape key.
The Telnet Escape character is a key combination, the <Ctrl> key and the <]> key pressed
simultaneously, which returns you to the Telnet prompt while leaving the connection to the
MTPX Plus switcher intact.
The Escape key is the <Esc> key on the computer keyboard.
Local echo
Once connected to the MTPX Plus switcher, by default, Telnet does not display your
keystrokes on the screen. SIS commands are typed in blindly and only the SIS responses are
displayed on the screen. To command Telnet to show keystrokes, at the Telnet prompt, type
set local_echo and then press <Enter> before you open the connection to the switcher.
With local echo turned on, keystrokes and the responses of the switcher are displayed on
the same line. For example: 1*1!In1 Out1 All, where 1*1! is the SIS command and In1
Out1 All
is the response.
With local echo turned on, all keystrokes are displayed, even those that should be masked,
such as the password entry. For example, when entering a password with local echo turned
on, you see a display such as a*d*m*i*n*, where admin is the keyed in password and
***** is the masked response.
You can turn off local echo by typing unset local_echo and then pressing <Enter> at the
Telnet prompt. If you are connected to the MTPX Plus switcher and need to access the Telnet
prompt to turn local echo off, type the Escape character (<Ctrl>+<]>).
Set carriage return-line feed
Unless commanded otherwise, Telnet transmits a line feed character only (no carriage return)
to the connected switcher when you press the <Enter> key. This is the correct setting for SIS
communication with the switcher. The Telnet set crlf command forces Telnet to transmit
carriage return and line feed characters when <Enter> is pressed, but if crlf is set, the SIS link
with the switcher does not function properly.
Close
To close the link to the switcher, access the Telnet prompt by typing the Escape character
(<Ctrl>+<]>). At the Telnet prompt, type close, and then press <Enter>.
Help
For Telnet command definitions, at the Telnet prompt, type ? and then press <Enter>.
Quit
Exit the Telnet utility by typing quit and then pressing <Enter> at the Telnet prompt. If you
are connected to the MTPX Plus switcher, access the Telnet prompt by typing the Escape
character (<Ctrl>+<]>).
MTPX Plus Series • Ethernet Connection 150