SIMPLE - SIP for Instant Messaging and Presence Leveraging

SIMPLE is an IETF (Internet Engineering Task Force) working group which, as its title suggests, is responsible for the development of SIP (Session Initiation Protocol) based IM (Instant Messaging) and Presence services.


  • Fully interactive 3GPP based network map
  • Narrated call flows
  • Detailed network procedures

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