Polycom EF2241 manual Introduction, Welcome How to Use This Manual

INTRODUCTION

INTRODUCTION

Welcome

How to Use This Manual

Congratulations on your purchase of the Vortex EF2241!

This is a reference manual for your EF2241. It is structured to provide the informa- tion you need quickly and conveniently. The following is an overview of each sec- tion:

•Introduction

•Pre-Installationincludes information about the contents of the box, tools needed for installation and front and rear panel descriptions.

•Installation covers connections of inputs/outputs and calibration of inputs of the EF2241.

•Integrating the EF2241 Into Your System describes adjustments to take into con- sideration when integrating the EF2241 with surrounding equipment in your sys- tem.

•LCD Menu Structure describes an overview of the LCD menu structure and also gives a system overview of features and options available.

•Troubleshooting helps to debug problems with installation.

•Technical Specifications provides the technical specifications of the EF2241.

•Conference System Design gives suggestions on topics to consider when design- ing your system.

•EF2241 Block Diagram shows the inside of the EF2241.

•Connector Pinouts shows pinout diagrams for EF2241 input and output connec- tors.

•Warranty Information

•Definition of Terms explains terms used in this manual, as well as terms used in our technology of echo cancellation, noise cancellation, and audio conferencing.

About the EF2241 The Vortex EF2241 is a companion to the Vortex EF2280, or a stand-alone solution for audio conferencing. It automatically mixes four microphones and other audio while cancelling acoustic echoes and annoying background noise, and features a built-in “phone add” to bring telephone calls into the conference. A total of 8 Vortex devices can be linked together (for instance, 8 EF2280s, or 2 EF2241s and 6 EF2280s).

The EF2241 has 4 mic/line inputs, 4 line inputs and 8 line outputs with 4 channels of acoustic echo and noise cancellation. It has matrix mixing and automatic microphone mixing capabilities, a single telephone line interface, and a single channel power amp.

It includes a total of 8 analog inputs (4 mic/line level inputs and 4 line level inputs), 8 analog outputs, and 5 digital expansion busses (one being dedicated to phone). Acoustic echo cancellation (AEC) and noise cancellation can be applied to each of the 4 mic/line level inputs, and each of these inputs can then be sent to one of the two internal automatic microphone mixers.

The system also contains a 23 x 17 main matrix, four 7 x 3 submatrices, and one 7 x 2 submatrix for transporting audio from the phone line. The 23 x 17 main matrix has the following inputs: Input channels 1-4 (gated or ungated), Input channels A-D, the internal signal generator, 3 mixes of each of the four digital busses (3 mixes times 4

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