MIME media type name: audio MIME subtype name: QCELP Required parameters: None Optional parameters: ptime, maxptime Encoding considerations: binary This type is used for transfer via RTP [RFC 3550], and storage (or transport) per [RFC 3625]. As a binary format, it may be transported or accessed using protocols that require content transfer encoding. Security considerations: See the Security Considerations sections of RFC 3555 and RFC 3625. Interoperability considerations: none Published specification: RFC 2658 and RFC 3625 Applications which use this media type: Audio and video streaming and conferencing tools, and cellular network infrastructure and devices Additional information: none Person & email address to contact for further information: Stephen Casner Intended usage: COMMON Author/Change controller: IETF