A-5
MVX Plus 128 VGA Matrix Switchers • Ethernet Connection
PRELIMINAR
Y
Once you are logged in, the switcher returns either
Login Administrator
or
Login User
. No further prompts are displayed until you break or disconnect
the connection to the MVX Plus 128 switcher.
Escape character and Esc key
When Telnet is fi rst started, the utility advises that the
Escape character is ‘Ctrl+]’
.
Many SIS commands include the keyboard
E
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, that returns you to the Telnet prompt while leaving the
connection to the MVX Plus 128 switcher intact.
The Escape key is the
Esc
key on the computer keyboard.
Local echo
Once connected to the MVX Plus 128 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 switcher’s responses 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 MVX Plus 128 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 defi nitions, 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 MVX Plus 128 switcher, access the Telnet prompt by
typing the Escape character (
Ctrl
+
]
).
