Voice Coding Standards

There are a number of voice coding standards. The Avaya 4600 Series IP Telephones offer the options described below:

• 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.729A and G.729B, which describe adaptive code-excited linear-predictive (CELP) compression that enables voice to be coded into 8 kbps streams.