Voice call and audio streams

Hi,
my goal is to start a voice call and, when connected, play a predefined sound file and redirect incoming audio, if any.

I’m using a MC8775V connected via USB.

I can establish the connection sending “ATD123;” command, the phone on the other side rings, the card correctly detects when the call gets answered, but after that nothing happens.

Is there a way to send audio data to the card via USB? Is it possible to receive incoming voice stream?

Thanks
Ernesto

Hi,

You can try using open AT application with ADL audio service .

For more details refer to ADL User Guide.

Thanks.

Thank you for your reply.
Yes, that’s an option, but I have to develop a PC-based app, and so I would prefer, if possible, not to write any embedded software.
In any case, after writing my embedded app that somehow sends and receives voice files using ADL audio services, I have to interface it from my PC-based app, and the problem of sending/receiving files from the PC to my embedded app is still there.
In short: can it be done using AT commands and the DM port?
Kind regards,
Ernesto