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.

CoD - Confirmation of Delivery

A notification sent by the receiving LAC (Link Access Control) Sublayer to the Layer 3 sending entity. This acknowledgement process forms part of the procedure for sending PDU (Protocol Data Unit) in AM (Assured Mode).


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

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