TETRA is an abbreviation of TErrestrial Trunked RAdio. It is the only official European Standard for digital Professional Mobile Radio (PMR). Accordingly, TETRA is a global standard for radio communication in the same way that GSM is the mobile telephony standard.
TETRA was developed to meet the needs of the most demanding professional radio users who need fast oneto-one and one-to-many radio communication using voice and data in their daily work. Users are typically public safety and security organisations like police, fire and rescue forces, ambulance services, frontier guards and other professional cellular users like transportation companies, courier services, energy utilities, airports and so on.
Most TETRA networks for public safety and security (PSS) users such as police, fire and rescue services are government owned. Other networks are either privately owned or run by network operators who invest in the network and sell communications services to private companies and government agencies.
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but its not as simple as we think.... get full information on the project prospects before starting.......