High Quality Content by WIKIPEDIA articles! H.248 or Megaco or Gateway Control Protocol is a recommendation from ITU Telecommunication Standardization Sector (ITU-T) which defines protocols that are used between elements of a physically decomposed multimedia gateway. It is an implementation of the Media Gateway Control Protocol Architecture (RFC 2805). H.248 is also called Megaco or in IETF domain. It is now know as Gateway Control Protocol. The current standard published in September 2005 by ITU-T is H.248.1: Gateway control protocol: Version 3.