"The Enhanced Voice Services (EVS) Codec is specified in the series of Technical Specifications 3GPP TS 26.441 [3] to TS 26.451 [13] and it is characterized in TR 26.952 [14]. The present document describes the ""generic frame format"" for the EVS Codec for the application in 3G Circuit- Switched Networks. This format is based on the RTP framing@ as specified in TS 26.445 [7]. This generic frame format will be used as a common reference point@ when interfacing speech frames between different elements of the 3G system. Appropriate mappings to and from this generic frame format will be used within and between each system element. "