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PHS8: Tone generation | Thales IoT Developer Community

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atonmh's picture
atonmh

March 27, 2014 - 1:26pm, 4527 views

Hello, I'm using a PHS8 module in audio mode 1: Standard mode (reference handset). To be able to test the handset speaker in an environment with no network, I would like to generate a tone directly on the speaker handset. Is this possible on a PHS8? I know that on previous modules like MC75i there were some AT commands like "AT^SNFG" for tone genereration. Thanks a lot. Regards.
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Jędrzej Gemalto Moderator's picture
Jędrzej Gemalto...
Mar 27 2014 - 4:40pm
Hello, PHS8 doesn't support local tone generation. If you wish to test if audio is working you can enable local audio looping which is intended for this purpose: at^scfg="Audio/loop","1" I hope this will help you. Regards Jedrzej
atonmh's picture
atonmh
Mar 27 2014 - 5:49pm
Hello, Thanks for your answer, it works. I also found another way with AT^SRTC command. I didn't see we can execute "event 1" locally through the AT^SRTC execution command. Thanks again. Regards.
IsakVisini's picture
IsakVisini
May 15 2020 - 7:59pm

Hi...As per my experience for DTMF to work "properly" the two DTMF frequencies need to have a sinewave characteristic. Also, combining the two appropriate square waves will produce so much noise, that a DTMF detector may not be able to discriminate the actual signal from the noise. The Propeller is fully capable of generating an appropriate signal. Heck, the BS2 is able to do this by generating a pseudo-sine wave with a small RC filter.