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.

CAI - Charge Advice Information

A charging tariff sent from the MSC (Mobile Switching Centre) and held on the mobile; this is used to calculate billing information on the mobile and present it to the user as charging advice. This information should not be assumed to be the actual cost incurred for the call.


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

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