TErrestrial Trunked RAdio (TETRA) is a new open digital trunked radio standard which is defined by the European Telecommunications Standardisation Institute (ETSI) to meet the needs of the most demanding professional mobile radio users.

* See also Cellular Technologies of the world
* See also Tetra in Southern Africa

The TETRA Memorandum of Understanding (MoU) was established in December 1994 to create a forum which could act on behalf of all interested parties, representing users, manufacturers, operators, test houses and telecom agencies. 

Today the TETRA MoU represents 56 organisations, from 19 countries. The group of manufacturers represents the entire European PMR industry, exclusive of MATRA and AEG (TETRAPOL).

A larger field trial is under preparation in Denmark to demonstrate interworking between equipment and user applications from different suppliers, and to verify the real operation of the standard and its facilities.

TETRA has now reached a stage of completion from ETSI and a 100% acceptance from all the European Administrations, and all future professional users of PMR are encouraged to study the TETRA standard and wide range of facilities to plan their application for TETRA.

The goal for the TETRA MoU is to provide the users of PMR with the next generation of systems to see them into the 21st century. It is an ambitious goal, but with TETRA we believe that we have the means to achieve this goal.

* See also Cellular Technologies of the world
* See also Tetra in Southern Africa