TETRA digital trunked systems provide secure, reliable and efficient voice and data communications, which are being widely used in many countries around the world.

TETRA数字集群系统提供安全、可靠以及高效率的语音和数据通信，在全球许多国家得到了广泛的应用。

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The latest generation of the digital trunked system TETRA, which is defined by the European Telecommunications Standards Institute (ETSI), is one of the most advanced mobile communication systems.

ETSI发布的欧洲新一代全数字集群系统TETRA是当今最先进的移动通信系统之一。

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In 1998, ETSI publicized TETRA protocal, which is a standard of digital trunked radio communication system.

TETRA协议是欧洲电信标准协会(etsi) 1998年公布的一种数字集群通信系统标准。

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In 2000, our Governor determined that we should implement the first statewide digital trunked radio system in the United States, utilizing primarily Motorola mobiles, portables and base station equipment which was then state of the art.

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Trunked radio is digital, allows more efficient use of spectrum, and does not tie a radio to a specific talk channel.

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Special and expensive digital handsets are required to talk on trunked systems.

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