NBA - NASS-IMS Bundled Authentication

NBA is an IMS authentication mechanism which is an alternative to IMS AKA. NASS-IMS is used when the access network is TISPAN based eg xDSL, where authentication is based on a specific user registering from a specific location. The NASS (Network Access Subsystem) is a feature of the TISPAN architecture.


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

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