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OCF - Online Charging Function

In the 3GPP IMS (IP Multimedia Subsystem) architecture, the OCF forms an integral part of the online charging system, determining whether or not, from a billing perspective, the customer is allowed to access network resources or services. The EBCF (Event Based Charging Function) and SBCF (Session Based Charging Function) are key elements of the OCF.


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

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