Voice Coding Standards

There are several voice coding standards. Avaya 4600 Series IP Telephones offer these options:

• G.711, which describes the 64 kbps PCM voice coding technique. G.711-encoded voice is already in the correct format for digital voice delivery in the public phone network or through PBXs.
• G.726A, which describes a 32 kbps coding technique.
• G.729A and G.729B, both of which describe adaptive code-excited, linear-predictive (CELP) compression that allows voice to be coded into 8 kbps streams.