Ericsson LBI-39224 manual Aegis, Audio Board, Bit error rate, C3 Maestro, Call Director

LBI-39224

Glossary of Terms

Aegis

Aegis is Ericsson's digital voice audio system that employs advanced Digital Signal Processing (DSP) circuitry. Aegis has two primary modes – "Aegis digital" and "Aegis private." Aegis digital mode offers improved weak signal performance and impedance to unauthorized monitoring when compared to standard analog (clear) voice transmissions. Aegis digital transmissions are not encrypted. Aegis private mode also offers improved weak signal performance. In addition, since Aegis private transmissions are encrypted, Aegis private mode provides very secure communications against unauthorized monitoring.

Audio Board

The Audio Board routes audio, mobile data, and Aegis data between EDACS radio systems, dispatch consoles, logging recorders, etc. The board digitizes analog signals applied to its audio inputs and applies the digitized signals to the TDM bus. It performs the reverse process for its audio outputs.

bit error rate

The average rate of errors on a radio channel, usually expressed as a percent (e.g., a 5% error rate indicates an average of 1 error in every 20 bits transmitted).

C3 Maestro

The C3 Maestro is the CRT-type console that is designed to take advantage of the advanced features of EDACS. It consists of a specialized audio unit and an IBM PC compatible computer running custom software developed by Ericsson.

Call Director

A Call Director (CD) is optional hardware equipment interconnected to a dispatch console such as the C3 Maestro. It interfaces a console to a telephone network.

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