# APRStt

AI-generated

APRS touch tone:
a way for a radio with only a DTMF keypad to take part in [APRS](../aprs/index.html.md).
The user keys in a callsign, a position or a short message as DTMF digits,
and a gateway turns them into APRS objects
and can announce them back by voice or Morse.

## References

* [APRStt](http://www.aprs.org/aprstt.html) and its [coding](http://www.aprs.org/aprstt/aprstt-coding24.txt)
* [Dual-tone multi-frequency signaling on Wikipedia](https://en.wikipedia.org/wiki/Dual-tone_multi-frequency_signaling)