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Audio channel connection between GSM Module sim300c and PC

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sahin5002

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I need to select an audio codec IC to convert analog voice of sim300c into PCMU/PCMA and inversely PCMU/PCMA signal is convert into analog voice which is connect with the mic of sim300c.
Need suggestion for choosing the chip and also schematic .
 

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please check, does u r modem supports PCM, which gives you digital interface using internal codec...
 

Modem gives MIC and speaker outputs directly on the board. you can connect directly. I used to connect it directly. but the volume will be too low.
 

ckshivaram said:
Modem gives MIC and speaker outputs directly on the board. you can connect directly. I used to connect it directly. but the volume will be too low.
Click to expand...

If I connect the mic and speaker directly with the soundcard, i know its work. but i have to connect more then 1 module with PC. So I need an ADC,DAC IC for each module.
 

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