Olympics organisers will use Airwave radio at the London 2012 Games for general communications.
The London Olympics is the first to have its own private radio services. It will use the same Tetra technology as the emergency services use, but it will be on a separate network.
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The London Olympics Games Organising Committee will decide which staff have access to the network, which, it says, will improve efficiency and safety.
London 2012 chairman Sebastien Coe said, "Secure communication between venues and personnel at games time will be critical to our success."
The network will provide radio services to all London venues and some others in the UK.
Work on the new infrastructure has already started and Airwave says it will be ready in April 2011, in time for the test events, which start later in the year.