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VoIP Codec - How to choose?
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A codec (Coder/Decoder) converts analog signals to a digital signal to become bitstream so that in can be utilize by VoIP. Decoding function by Codec is required at the other caller site to transform the digital signal back to normal voice.

Codecs also perform voice compression to save network bandwidth. Some codecs also support silence suppression, where silence is not encoded or transmitted.


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