TETRA Communication Solutions - Eemits Communications Ltd


Tetra is a common digital trunked standard for two way radio. The standard developed by European Telecommunications Standardisation Institute (ETSI) assures the interoperability between various manufacturers terminals that can indistinctly operate on any TETRA network. This is not currently the case for digital dPMR or DMR two radio.

This technology is targeted primarily at the mobile radio needs of public safety groups (such as police and fire departments), utility companies, and other enterprises that provide voice and data communications services. In recent years, when European disasters have struck, emergency response teams from several European nations had a difficult time communicating with each other, due in part to the lack of standardization in their mobile radio equipment. The TETRA standards evolved to answer this communication challenge as well as others faced or anticipated by the European Commission (EC) in its efforts to unify European countries.

The Main TETRA features are:

  • Digital voice quality
  • Fast emergency call set-up
  • Comprehensive support to group and individual voice and data communications
  • Communications also in fringe or out of coverage areas with direct mode of operation (DMO)
  • Multiple security schemes and algorithms (two encryption levels)
  • Data transmission at up to 28.8Kbps and simultaneous with voice
  • Standard interfaces for data terminal connections (PEI) and for TETRA networks interconnection (ISI)

TETRA Capabilities and Features

From end user point of view, TETRA provides the following features and services:

  • Group call
  • Individual call
  • Telephone Interconnect Call
  • Wireless data: Circuit switch and/or packet data
  • Integrated Voice and Data
  • Secured network with authentication and encryption
  • Direct Mode Operation
  • Advanced radio features and capabilities such as Dynamic Grouping, emergency call, etc

Spectrum Utilization

TETRA utilizes Time Division Multiple Access (TDMA) technique to achieve spectrum efficiency. TETRA can achieve up to 4 (four) TDMA time slots in one 25 KHz radio channel

Frequency Band

Frequency bands for TETRA products that are typically found in the market today:

  • 380 - 400 MHz
  • 410 � 430 MHz
  • 800 MHz Band

Tetra Two Way Radio Products

Click on one of the categories below for links to related products.

Eemits Communications Ltd have been involved in work at Hartlepool Power Station for over 10 years now. During this time they have installed an Aerial network through our buildings to enable more efficient internal radio communications.

I have found the staff highly professional at all times and willing to provide help whenever they can, I would have no hesitation in recommending this company.

Hartlepool Power Station

We are now in our second rental term with Eemits and have found it to be an economical way of ensuring that we have the latest equipment at an affordable price.

In addition the headache of maintaining and repairing the equipment is also removed as it's all included in the price.

Darlington FC

Eemits had an excellent track record in providing similar communications systems to a wide spectrum of industries and were willing to work with us to come up with ways to help our field operations.

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