Special Command Prefixes - AOR ARL2300 User Manual

If the hyphen (-) has been added immediately after the result code, there is a data or message
that needs to be send to client.
Do not attempt to send data to the ARL-2300 until the appropriate result code (result code with
immediate blank code) is received. Make sure to send data to ARL2300 after the result code with
immediate blank code.
The result code consists of three digits (in hundreds) and represents the following message
groups:
2xx -
3xx -
4xx -
5xx -
The 2xx result code generated from the ARL2300 in the TCP Communication Chart has following
meanings:
231 -
232 -
233 -
234 -
235 -
New result codes may be added at the time of future firmware updates, however, successful TCP
connection establishment always ends with the "230 Welcome" message. Refer to chapter 8.3
(UDP audio transmission port) for details on result codes 232, 233 and 234.

8.2.1 Special command prefixes

The special CPF (Special Command Prefix) is a header character that controls ARL2300. If data is
sent to the ARL2300 without special CPF, the data is applied to the receiver directly. No data is
passed on to the receiver if ARL2300 received the command with special CPF, and the data is used
to control the unit.
Command Command Type
Prefix
b Audio data length
of UDP packet
e Set special CPF
Immediate success on received command and message.
Requesting more commands.
Send message to client and disconnect the link.
Error
Prefix for special command,
Adding time stamp to the UDP packet is possible.
Adding LM value (Receiver S-meter value) to the UDP packet is possible.
Maximum octets value for the audio data for one packet.
ARL2300 version information.
Description
Set the length of audio data for one UDP packet. The length
should be set by octet. The octet value should be smaller than
the result code of 234 and it should be an even number.
Example: b2048 ---- Set to octet 2048
The default character is "@". To change the special CPF, use
this command.
Example: e+ ---- Set special CPF to "+"
22