Codecs are standards that encode and decode sound into data streams for transmission in the internet environment. Codecs convert audio voice signals into a digitally compressed form for transmission over the internet. When the signal reaches a destination on the network, the codec converts to an uncompressed audio signal for playback. That is what makes VoIP possible. 

  • G.711 delivers uncompressed high-quality voice. You can choose between two different values of G.711: G711A (PCMA) and G711U (PCMU). 
    • G711A is an international circuit standard used for Europe and many APAC countries.
    • G711U is used for the US Federation.
  • G.729 is compressed so it uses less bandwidth at the sacrifice of quality. 

To configure it, please follow the steps below.

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