Architecture of H 323

Architecture of H 323 

Architecture of H 323 

• The general architecture of  H 323 is as show in figure
• H323 is a standard designed by ITU in order to make the voice communication between the  telephone on the public telephone network with the computers connected to internet, practically possible.
• internet is connected to the telephone via a gateway as shown. A gateway is a five layer device which makes the communication between one protocol stack to another, possible by translating the message.
• The gateway used in above figure translating the message suitable for the internet. 
• The gatekeeper  server connected in local area network as shows in figure work as the registrar server. 
• A number of protocols are used by H323 in order to establish and maintain  voice or video communication all these supporting protocol.
• G.71 or G723.1 are used by H.323 for carrying out the audio/video compression. A protocol named H.245 is used to allow the communication parties to negotiate the compression method.   

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