Definition
H.248 is a media gateway control protocol through which the media gateway controller (MGC) controls the media gateway (MG) so that interoperability is implemented between different media. ITU-T issued the first version of this protocol in June 2000.

Purpose
Compared with MGCP, H.248 has the following merits:
Supports more types of access technologies, and is more thorough and complete in standardization
Compensates for the deficiency of MGCP in descriptiveness, is applicable to larger networks and has better extensibility and flexibility
Carried on various protocols, such as UDP/SCTP (MGCP is carried on UD

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