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H.323 and Media Gateway Control Protocol (MGCP) are two protocol suites that the industry uses to support VoIP. H.323 recommendations are supported by the International Telecommunication Union (ITU-T) and MGCP is supported by the Internet Engineering Task Force (IETF). H.323 and MGCP are not stand-alone protocols.
These protocols depend on many other supporting protocols in order to complete their operations. Whether to use H.323 or MGCP is a customer-specific decision since they have very similar features. This document discusses the advantages of H.323 and MGCP and what each one supports. There are no specific requirements for this document. The information in this document is based on the Cisco CallManager and Cisco IOS® gateways. The information in this document was created from the devices in a specific lab environment.
All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command. Neat Image 6.0 Pro Serial. Refer to for more information on document conventions. H.323 is an ITU umbrella recommendation for multimedia communications over IP-based networks that do not provide a guaranteed quality of service. H.323 covers point-to-point communications and multipoint conferences and addresses call control, multimedia management, bandwidth management, and interfaces between LANs and other networks. Prodigits Password Hack. The basic components of the H.323 protocol are terminals, gateways, and gatekeepers (which provide call control to H.323 endpoints).