- G.711: The standard that digitizes analog voice signals and requires 64 Kbps of bandwidth
- G.729: The standard that digitizes analog voice signals using an algorithm for an 8:1
- G.722: The standard that provides higher-fidelity speech and uses 48 to 64 Kbps
- G.726: The standard that requires 16 to 40 Kbps of bandwidth and is primarily used in international trunks in the phone network.
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Back to Basics blog series, we discuss terminology that you will come across when looking to move to VoIP. In the past, we looked at SIP Trunking, Quality of Service, and Erlang Studies. The following is an explanation of the term codec, courtesy of TechTarget When we talk about VoIP call quality, think of the term codec, which stands for coder-decoder. Here's the basic explanation of how VoIP works: A codec converts an audio signal (voice) into compressed digital form for transmission, then converts it back into an uncompressed audio signal for replay. The most popular and frequently supported codecs are: