Escape character and esc key, Local echo, Set carriage return-line feed – Extron electronic ISM 482 User Manual
Page 94: Close, Help, Quit
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Integration Scaling Matrix Switcher • Ethernet Connection
Once you are logged in, the ISM returns either Login Administrator or
Login User
. No further prompts are displayed until you break or disconnect
the connection to the ISM.
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, that returns you to the Telnet prompt while leaving the
connection to the ISM intact.
The Escape key is the
Esc
key on the computer keyboard.
Local echo
Once the computer is connected to the ISM, by default Telnet does not display your
keystrokes on the screen. SIS commands are typed in blindly and the SIS responses
are displayed on the screen. To command Telnet to show keystrokes, type set
local_echo at the Telnet prompt, and then press
Enter
before you open the
connection to the switcher.
With local echo turned on, keystrokes and the switcher’s response 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.
Local echo can be turned off by typing unset local_echo and then pressing
Enter
at the Telnet prompt. If you are connected to the ISM 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 ISM 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. Do not set crlf on. If necessary, issue the unset crlf command to turn
off crlf.
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 press
Enter
at the Telnet prompt. If
you are connected to the ISM, access the Telnet prompt beforehand by typing the
Escape character (
Ctrl
+
]
).