Question on sending/receiving DTMF over RF modules

I have one question about sending receiving DTMF over RF modules?

DTMF must be send over FM modules ?

what is your complexity write in detail............dtmf or any data less than carrier frequncy can be send easily

just DTMF signal, must use FM module or can be transfered over ASK-FSK ?

than you can send it easily what is the problem.

question in my post #3

You need an analog modulation method to transmit DTMF, e.g. AM or FM. Digital RF modules can't.

It would be easy to transmit the tiny information content of DTMF signals in digital form, e.g. using a popular remote control encoder.

Thanks FvM I just needed confirmation, thanks again. I'm new in RF area, but I catch lots of things for short time.

You can use MAX2606 as FM TX, see datasheet for additional info: