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O-BCSM - Originating – Basic Call State Model

The BCSM (Basic Call State Model) is a high-level finite state machine description of the CCF (Call Control Function) activities required to establish and maintain communication paths for users who have IN services. For circuit switched operation there will be an Originating and Terminating BCSM.


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

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