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Ethernet Connection, cont’d
CrossPoint 450 Plus and MAV Plus Switchers • Ethernet Connection
A-6
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
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 BME intact.
The Escape key is the
E
key on the computer keyboard.
Local echo
Once connected to the BME, 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 your computer is connected to the BME and you
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 BME 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 BME does not function
properly.
Close
To close the link to the BME, 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 BME, access the Telnet prompt by typing the Escape
character (
Ctrl
+
]
).