The Enhanced Voice Services (EVS) Codec is specified in Technical Specifications TS 26.441
to TS 26.451
. The generic frame format for 3G CS networks is specified in TS 26.453
. The allowed EVS Configurations of the UMTS_EVS Codec Type are specified in TS 26.103
The present document specifies the mapping of the EVS generic frame format (TS 26.453
) to the Iu Interface (TS 25.415
) and the Uu Interface, including handling of the EVS-CMR by the UE and the Iu-terminating MGW.
The present document specifies also the mapping to the Nb Interface in a BICC-based circuit switched core network. (TS 29.415
.) and the Nb-Interface in a SIP-I-based circuit switched core network (TS 23.231
The present document specifies also the interworking of different EVS Configurations on the terminations of the MGW and the interworking between EVS and AMR-WB on the terminations of the MGW.