Terrestrial Trunked Radio (TETRA) is the modern digital Private Mobile Radio (PMR) and Public Access Mobile Radio (PAMR) technology for police, ambulance and fire services, security services, utilities, military, public access, fleet management, transport services, closed user groups, factory site services, mining, etc.

TETRA has created an opportunity for organizations to radically rethink their operations' communications. It enables integrated, future-orientated, wireless services that address growing mobile voice and data communications needs.

TETRA is one of the most powerful digital voice and data technologies available with powerful capacity for data transmission. It's sophisticated technology offers many benefits that can revolutionize your day-to-day business activities.

With the convergence to IP connectivity, the integration of value adding applications can be achieved smoothly and cost effectively. Whatever your operation - from protecting the public to managing a transport network - it can benefit from TETRA. To meet the many different operational and business needs, a wide variety of specialist applications are required. These applications turn a communication system into a total communication solution.

TETRA offers fast call set-up time, addressing the critical needs of many user segments, excellent group communication support, Direct mode operation between radios, packet data and circuit data transfer services, frequency economy and excellent security features. TETRA uses Time Division Multiple Access (TDMA) technology with 4 user channels on one radio carrier and 25 kHz spacing between carriers. This makes it inherently efficient in the way that it uses the frequency spectrum. For emergency systems in Europe the frequency bands 380-383 MHz and 390-393 MHz have been allocated for use by a single harmonized digital land mobile systems by the ERC Decision (96)01. Additionally, whole or appropriate parts of the bands 383-395 MHz and 393-395 MHz can be utilized should the bandwidth be required.

For civil systems in Europe the frequency bands 410-430 MHz, 870-876 MHz / 915-921 MHz, 450-470 MHz, 385-390 MHz / 395-399,9 MHz, have been allocated for TETRA by the ERC Decision (96)04.

TETRA trunking facility provides a pooling of all radio channels which are then allocated on demand to individual users, in both voice and data modes. By the provision of national and multi-national networks, national and international roaming can be supported, the user being in constant seamless communications with his colleagues. TETRA supports point-to-point, and point-to-multipoint communications both by the use of the TETRA infrastructure and by the use of Direct Mode without infrastructure.

Tetra offers a mobile communications network designed exclusively for business that covers all your Digital communication needs.
The digital network combines the virtues of two-way radio, mobile telephony and messaging – all within one handset. Negating the need to carry around two or more pieces of equipment. The Tetra network enables you to contact any number of individuals on the move or dispersed across multiple sites – literally at the touch of a button. You can also contact up to 100 individuals simultaneously.

The network utilises the advantages of a digital mobile technology called TETRA; a standard defined by the European Telecommunications Standards Institute. While TETRA combines various features of analogue two-way radio and mobile cellular telephony, it has advantages over both technologies. Background noise suppression is built in to the Tetra network, making voice communications clearly audible, even in environments like airports, concerts and building sites.