I think you are asking if sending touch tone commands over ham radio to remotely control devices with your IRLP node computer is legal.
In the United States the answer is YES. In fact, that's what the Amateur Radio Service was created for.
See FCC regulation 97.1 b, c and d at the links below:
The FCC has created a special class of amateur radio station called an Auxiliary Station which authorizes you to make one way transmissions for touch tone commanding and also getting telemetry back.
see FCC regulation 97.201 for the rules regarding Auxiliary stations.
FCC rule 97.111 b3 specifically authorizes you to send "telecommands" which is what you are doing when you send touch tones to control a remote device.
FCC rule 97.111 b7 Authorizes you to have your remote IRLP computer send you data back.
Hope this helps.
Have fun and when you get something working, tell us how you did it.
> I haven't taken a look at the interfaces since I got my node about a year and a half ago. But it occurred to me that I might use some of the DTMF tones to control scripts, that communicate with I/O.
> One thought would be to remotely turn on a video camera, for surveillance or to turn on an alarm. Or conversely, to use an input to sense something and send me a radio message.
> Some of this might not be strictly legal. But if I can send a DTMF control to speak the time to me, it's not much of a stretch for a switch closure to send me a "intrusion" voice alert.
> What kind of I/O is possible on the Embedded node, if any? I think there is a minimum of serial and parallel but I haven't looked into it to see how the control is done? Ideas?
> What are the legalities of sending such warnings or controls?
> Node: 4581