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   Most Installed System

 

 

 

 

EDACS

Enhanced Digital Access Communication System

 

 

Open Standard/Proprietary

Proprietary

Analog/Digital

Both

FDMA/TDMA

FDMA

Conventional/Trunked

Trunked

Typical frequency band

VHF/UHF/800/900

Channel bandwidth

25/12.5 kHz

 

 


What is EDACS

 

EDACS (Enhanced Digital Access Communication System) is a trunked system that is available in both analog and digital air interface. This technology was invented by General Electric Corporation in mids 1980s. This system is based on a number of proprietary interfaces and protocols, for example, the air interface is proprietary as well as the digital vocoder, known as the Aegis Vocoder. EDACS is used in trunked repeater systems that include wide-area simulcast operation.

 

EDACS was manufactured by ComNet Ericsson, headquarter in the US, and eventually was sold after the telecom meltdown. M/A-COM Inc, a holding of Tyco Electronics, acquired the asset and continue to support the product family.

 

(Source: Wikipedia)

 


Spectrum Utilization

 

EDACS utilizes Frequency Division Multiple Access (FDMA) technique to utilize spectrum. EDACS support both 25 KHz and 12.5 KHz bandwidths. Thus, EDACS can achieve up to 2 voice channel in a 25 KHz radio channel.

 


Frequency Band

The current available product in the market today offers the following frequency bands:

  • VHF

  • UHF

  • 800 Band

  • 900 Band


Network Architecture

 

Click here to learn EDACS architecture

 


Deployment of EDACS

 

Over 500 EDACS radio systems have been sold, with hundreds of thousands of radios.

(Source: Wikipedia)

 


More about this technology:

 

This article was mainly sourced from Wikipedia

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