Covid 19 Update: Given the current global situation, we have paused the delivery of our LiveOnsite courses, but our LiveOnline and OnlineAnytime Packages remain unaffected. Browse over 50 online courses in our course catalogue, or get in touch to register your interest in future LiveOnsite courses when we are able to safely resume in person training.

CDR - Charging Data Record

A CDR is a collection of information about a chargeable event such as the time of call set-up, the duration of the call, the amount of data transferred, etc that will be used for billing of a subscriber. It is possible that more than one CDR can be generated for a single chargeable event eg. a call that has taken place over a very long duration may have several CDRs associated with it.


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

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