Tetra : TErrestrial Trunked RAdio
Tetra : TErrestrial Trunked RAdio
Tetra : TErrestrial Trunked RAdio
Terrestrial Trunked Radio (TETRA) is an open digital standard defined by the European Telecommunications Standard Institute (ETSI).
Tetra : TErrestrial Trunked RAdio
TETRA Capabilities and Features
From end user point of view, TETRA provides the following features and services:
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Group call
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Individual call
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Telephone Interconnect Call
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Wireless data: Circuit switch and/or packet data
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Integrated Voice and Data
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Secured network with authentication and encryption
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Direct Mode Operation
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Advanced radio features and capabilities such as Dynamic Grouping, emergency call, etc
Frequency Band
Frequency bands for TETRA products that are typically found in the market today:
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380 - 400 MHz
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410 – 430 MHz
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800 MHz Band
Some vendors have promised to provide some other band to meet requirement in specific market.
TETRA also provides a point-to-point function that traditional analogue emergency services radio systems did not provide. This enables users to have a one-to-one trunked 'radio' link between sets without the need for the direct involvement of a control room operator and or a dispatcher.
TETRA is built to do one-to-one, one-to-many and many-to-many. These operational modes are directly relevant to the public safety and professional users.
The main advantages of TETRA over other technologies (such as GSM) are: the much lower frequency used gives longer range, which in turn permits very high levels of geographic coverage with a smaller number of transmitters, thus cutting infrastructure costs.
TETRA is also designed for emergency situations, when almost instantaneous communication is required, both between individuals and within a group of an unlimited size. Priority calls can be made, backed by call pre-emption if required, and on occasions an all-informed communication.
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