ETSI - TS 129 333
Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Multimedia Resource Function Controller (MRFC) - Multimedia Resource Function Processor (MRFP) Mp interface; Stage 3
|Publication Date:||1 January 2021|
The present document describes the protocol to be used on the Multimedia Resource Function Controller (MRFC) - Multimedia Resource Function Processor (MRFP) interface (Mp interface). The IMS architecture is described in 3GPP TS 23.228 , the functional requirements are described in 3G TS 23.333 
This specification defines a profile of the Gateway Control Protocol (H.248.1), for controlling Multimedia Resource Function Processor supporting in-band user interaction, conferencing and transcoding for multimedia-services.
The present document is valid for a 3rd generation PLMN (UMTS) complying with Release 7 and later.