H.248 GCP - Gateway Control Protocol

The H.248 standard was initially a collaborative project between the ITU-T and the IETF (Internet Engineering Task Force), with the ITU now holding overall responsibility for the protocol. H.248 is a media gateway control protocol which is used to create, modify and delete media streams across a MGW (Media Gateway), in addition to negotiating the media formats to be used. Transactions which carry the various H.248 commands are relative to contexts, which are created on an individual basis for each media stream being processed by the MGW.


  • Fully interactive 3GPP based network map
  • Narrated call flows
  • Detailed network procedures

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