SIP: Basics and Beyond

  • Authors:
  • Robert Sparks

  • Affiliations:
  • Estacado Systems

  • Venue:
  • Queue - SIP
  • Year:
  • 2007

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Abstract

More than just a simple telephony application protocol, SIPis a framework for developing communications systems.Chances are you're already using SIP (Session Initiation Protocol).It is one of the key innovations driving the current evolution ofcommunications systems. Its first major use has been signaling inInternet telephony. Large carriers have been using SIP inside theirnetworks for interconnect and trunking across long distances forseveral years. If you've made a long-distance call, part of thatcall probably used SIP.