RLS - Resource List Server

RFC 4622 defines the use of Resource Lists and RLS as a means of reducing the significant signalling overhead associated with providing SIP (Session Initiation Protocol) based Presence services. As such, the RLS acts as a termination point for SUBSCRIBE messages from SIP clients, interacting with resource lists to carry out presence services on behalf of the user in order to reduce traffic.


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

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