24
Control Via Telnet Commands
To control The Director D2800 in an auto-
mation network, you will need nerves of
steel, and a controller that can send and
receive telnet commands and responses.
The command and response structures
of the controls provided via telnet are
in simple human language. Power on is
simply “power1” followed by a carriage
return to end the command. Command
feedback is confirmed by an echo of
the command, followed by a carriage
return, then another statement of “01”
followed by the command string, then a
carriage return and a line feed to end the
response string. If there is a value-change
like volume up, then the confirmation
response will include the new value at the
end of the string.
Telnet Session Length:
Sending a command to the The Director
opens a telnet session – nothing tricky,
just send it a command and it will respond.
The session will remain open for 4 hours,
and then close. If another command is
received within that 4 hours, then the
clock restarts. The session will close 4
hours from the time of the last command
received. If your automation system treats
such activity as dropping off the network,
then pinging it in the early AM every day is
probably a good practice.
Control Command Examples:
Increment volume by 1, in Zone 3, where
volume before the command is 51:
Command: Z3vol+<CR>
Response: Z3vol+<CR>
01Z3vol52<CR><LF>
To turn on main power:
Command: power1<CR>
Response: power1<CR>
01power1<CR><LF>
To mute or turn Zone 5 off:
Command: Z5off<CR>
Response: Z5off<CR>
01Z5off<CR><LF>
Note:
The query ZONEON? returns a descrip-
tion of the on state of all the zones,
where each zone is separated by a space.
1 equals on, and 0 equals off. So if zones
6 and 7 are on and all the other zones are
off the information will be displayed like:
0 0 0 0 0 1 1 0 0 0. Also note that the last
two values in position 9 and 10 are reflect-
ing the state of the digital outputs. The re-
sponse to the query ZONEOFF? will return
the opposite values if zones 6 and 7 are off
as it is confirming that the zones are off so
that value is positive: 1 1 1 1 1 0 0 1 1 1.
Please visit our delightful website for
further information and a splendid table of
control commands:
http://www.audiocontrol.com/home-au-
dio/network-amplifiers/the-director-d-se-
ries/the-direct or-model-d2800/
(As things in the fast-paced world of
technical documentation are constantly
changing, visiting our website is one way
to make sure you have the latest informa-
tion.)
Control via Telnet Commands
