Don't Forget G.711 (Q93)

The information in this article applies to:

If an H.323 terminal is on a network that can support the bandwidth requirements of G.711 (56 or 64kbps), it is required to support both laws of G.711. If the bandwidth constraints of the network preclude the use of G.711, another audio codec must be used. For example, there is no such thing as a video-only H.323 terminal. Section 6.2.5/H.323v2: "All H.323 terminals shall have an audio codec. All H.323 terminals shall be capable of encoding and decoding speech according to Recommendation G.711. All terminals shall be capable of transmitting and receiving A-law and μ-law. … The audio algorithm used by the encoder shall be derived during the capability exchange using H.245."