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Codec Bandwidth

Voice codecs

A voice codec is responsible for the compression of your voice stream within a digital packet. It also determines sound quality and bandwidth required to send the packet. A VoIP gateway typically supports multiple voice codecs.

The most common voice codecs are:

  • GSM – 13 Kbps
  • iLBC – 15 Kbps
  • G.711 - 64 Kbps
  • G.722 - 48/56/64 Kbps
  • G.726 - 16/24/32/40 Kbps
  • G.728 - 16 Kbps
  • G.729 - 8 Kbps

If you’re the person responsible for the set-up, installation and maintenance of a VoIP gateway you will want to further your knowledge in the area of protocols and codecs. If not, simply make sure your VoIP gateway supports the same protocols and codecs that your VoIP service and or VoIP phone system support.

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