User guide

DMS 1600, DMS 2000, DMS 3200, and DMS 3600 • Ethernet Connection 112
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, which returns you to the Telnet prompt while leaving the connection to the
DMS matrix switcher intact.
The Escape key is the <Esc> key on the computer keyboard.
Local echo
Once connected to the DMS matrix 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 responses of the switcher 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 DMS matrix 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 <Ctrl> 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 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 DMS matrix switcher, access the Telnet prompt by typing the Escape
character (<Ctrl>+<]>).