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.

VPN - Virtual Private Network

This is a private network link, which is carried on a public network. VPNs can be implemented in number of ways, ranging from: Layer 1 VPN utilizing physical layer links such as E1 and SDH; Layer 2 VPN using data link connections based on ATM, FR, Ethernet etc; Layer 3 VPN, typically based on IP in IP tunnelling techniques such as those provided by IPSec. In addition, MPLS networks are also extensively deployed to support VPN connectivity. In this case, customer traffic is kept separate through the use of unique labels per customer.


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

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