beep tone sending via PC modem

[bunalmis]

I call any telephone number using ATDT command.
Telephone ring begin to working this is not problem,

I want to send 3 different beep sound (or any 3 different sound)
to telephone.

how?

I will use only PC and PC modem.

 

[yager]

First, your modem has to support Voice Command (V.253, IS-101)
Then, use AT+VTS to send voice tones (DTMF and/or dual tone with duration selection)
Or use AT+VTX to playback a voice (PCM,ADPCM,LINEAR,uLaw,ALaw...)
This way will be needed more commands (+VSM,+VLS,+VPR..., and <DLE> shielded codes).
Of course, do not forget the master command: AT+FCLASS=8 (select voice mode).

FYR

 

[mk3]

hi! and is it possible to receive/decode some DTMF tones with a voice modem too? uppydogeyes:

 

[yager]

it possible to receive/decode some DTMF tones with a voice modem too?

Modem will recognize and report the DTMF tones to DTE via <DLE> Shielded Codes.

 

[bunalmis]

Thank you Yager,

Can you write very simle code for this purpose and can you
post in this group? (Programming language not importand)

 

[mk3]

...or better post a link to some good voice modem commands/codes workings on the net. thanks.

 

[yager]

AT Command Set: to use the best search engine in the world - Google, you will find more and more.
If you are so lazy, try this one: **broken link removed**

To send tones via voice modem: try these by any RS-232 console:

DTE.Tx          DCE.Tx
AT+FCLASS=8     OK
AT+VLS=4        OK
AT+VTS=0        OK

you will hear tones from the internal speaker of voice modem

To gather DTMF codes via voice modem:

DTE.Tx          DCE.Tx
AT+FCLASS=8     OK
AT+VLS=0        OK
AT+VRA=0        OK
ATDT911         OK

now pick up the phone and press 123, the DTE.Rx will get: <DLE>1 <DLE>2 <DLE>3 ('<DLE>' as ASCII 0x10)

To learn more, study before asking....