Telnet tips
It is not the intention of this guide to detail all of the operations and functionality of Telnet;
however, some basic level of understanding is necessary for operating the SMX through
Telnet.
Connecting to the SMX (Open command)
Connect to the SMX using the
Open
command. Once your computer is connected to the
SMX, you can enter the SIS commands the same as you would if you were using the RS-232
link.
Connect to the SMX as follows:
1.
At the Telnet prompt, enter
open
<
IP address
>.
If the SMX is not password-protected, no further prompts are displayed until you
disconnect the PC from the SMX .
If the switcher is password-protected, Telnet displays the password prompt.
2.
If necessary, enter the password at the password prompt.
Ethernet connection to the switcher can be password-protected. There are two levels of
password-protection: administrator and user.
A person logged on as an administrator has full access to all SMX switching capabilities
and editing functions.
A person logged on as a user can select test patterns, mute or unmute the output,
select a blue screen, and view all settings with the exception of passwords. By default,
the switcher is delivered with both passwords set to carriage return.
Once logged in, the SMX returns either
Login Administrator
or
Login User
. No
further prompts are displayed until the computer is disconnected from the SMX .
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 <Esc> key.
The Telnet Escape character is a key combination: The <Ctrl> key and the <]> key pressed
simultaneously. Pressing these keys displays the Telnet prompt while leaving the connection
to the SMX intact.
The Escape key, used for SIS commands, is the <Esc> key on the keyboard.
Local echo
Once the computer is connected to the SMX, by default, Telnet does not display keystrokes
on the screen. SIS commands are entered blindly, and only the SIS responses are displayed on
the screen. To command Telnet to show all keystrokes, enter
set local_echo
at the Telnet
prompt before you open the connection to the switcher.
With local echo turned on, keystrokes and the SMX responses are displayed on the same
line. Example:
1*1*1!01Out01 In01
All
where
1*1*1!
is the SIS command and
01Out01
In01
All
is the response.
Note that 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,
a*d*m*i*n*
is displayed, where
admin
is the keyed-in password and ***** is the masked
response.
Local echo can be turned off by entering
unset local_echo
at the Telnet prompt. If the
computer is connected to the SMX, and you need to access the Telnet prompt to turn local
echo off, enter the Escape sequence (<Ctrl> + <]>).
SMX System MultiMatrix Switcher • Ethernet Control
110
