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SIP Design Choices

8/31/2005 Copyright - Ahlgren 2005 14

AhlTek

 Distributed architecture:

 Smart end points and components

 Separate signaling:

 Control, transport & media description:

 Allows addition of new applications or media types

 Transport protocol neutrality:

 Runs over reliable (TCP, SCTP)

 Runs over unreliable (UDP) channels, with minimal assumptions

 Request based routing:

 Direct routing for high performance or proxy-routed for control

 Extensibility:

 Distributed architecture, smart UA, proxies, registrars

 Flexible messaging formats

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Comet Labs IPTEL-S Manual do Utilizador Página 14