Ethernet Connection, cont’d
Annotator
•
Ethernet Connection
B-4
Telnet tips
It is not the intention of this manual to detail all of the operations and functionality
of Telnet; however, some basic level of understanding is necessary for operating the
Annotator via Telnet.
Connecting to the Annotator (Open command)
You connect to the Annotator using the Open command. Once your computer is
connected to the unit you can enter the SIS commands the same as you would if
you were using the RS-232 link.
Connect to the device as follows:
1
.
At the Telnet prompt, enter
open
IP address
.
If the processor is not password protected
, no further prompts are displayed
until you disconnect from the Annotator.
If the processor is password protected
, Telnet displays the password prompt.
2
.
If necessary, enter the password at the password prompt.
Connection to the processor via the Ethernet 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 the processing
capabilities and editing functions.
Users 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
processor is delivered with both passwords set to
carriage return
.
Once you are logged in, the processor returns either
Login Administrator
or
Login User
. No further prompts are displayed until you disconnect the from
the Annotator.
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 Annotator intact.
The Escape key is the Esc key on the computer keyboard.
Local echo
Once your computer is connected to the Annotator, by default Telnet does not
display your 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 processor.
With local echo turned on, keystrokes and the processor’s 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, you see a display such as
a*d*m*i*n*
, where
admin
is the keyed-in password
and
*****
is the masked response.
