Remote Control Protocol - Toa NX-100 Cookbook

TECHNICAL NOTE

Remote Control Protocol

• The NX-100 is capable of simultaneously holding a maximum of 8 TCP sessions with such
equipment as a PC (collectively "PC" herein) by using its PC control TCP port (the NX-100
functions as a server).
• In these sessions, communications are possible by transmitting and receiving commands made
up of ASCII character strings (TCP/IP packets).
• When a TCP session has been established with the NX-100, the PC needs to first enter into a
"management status" by sending a request-to-manage command and receiving an
acknowledgement command. (Be sure to exit the "management status" after control operation
completion.)
• As long as the PC remains in the "management status," it must transmit the alive check
command to the NX-100 every 60 seconds. (If the NX-100 does not receive the check
command for 2 minutes or a TCP error is detected, it cuts off the session, releasing the PC from
the "management status.")
• The NX-100 is capable of performing the tasks listed below by receiving a variety of commands
from the PC in the "management status." When a task has been performed, the PC receives from
the NX-100 data of the executed task. If the task cannot be executed, because for instance the
target receiver is busy, the PC receives data of its reason.
(NOTE: In the figure, NX-100 Unit 1 is the unit that receives commands from the PC.)
• Start and end of the "transmission stream" from the NX-100 Unit 1 to another NX-100 Unit 2.
• Start and end of the "reception stream" from another NX-100 Unit 2 to the NX-100 Unit 1.
• Make and break of the contact outputs of the NX-100 Unit 1.
• The NX-100 transmits the following data to the PC in the "management status" whenever the
status changes:
• Details such as the target receiving device and broadcast specifications of the "transmission stream"
that was started and ended.
• Details such as the original transmitting source and broadcast specifications of the "reception stream"
that was started and ended.
• NX-100 Unit 1's contact inputs and outputs of which make/break status has changed.
• Upon receipt of the request-to-report command from the PC(s) in the "management status,
" the NX-100 Unit 1 informs all such PCs of its current status as shown below:
• Details such as the target receiving device and broadcast specifications of the "transmission stream"
that is currently being executed.
• Details such as the original transmitting source and broadcast specifications of the "reception stream"
that is currently being executed.
• Make/break status of NX-100 Unit 1's contact inputs and outputs.
Software developers desiring to incorporate TOA proprietary protocol in software are
invited to contact their nearby authorized TOA dealer.
Outline of PacketAudio
REMOTE CONTROL PROTOCOL
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