Specifications

The following paragraphs give a summary of this guide, and the features
and installation summary for the AT&T Digital Feedback Eliminator (DFE).
About This Guide
This installation and use guide explains the installation and configuration of
the AT&T Digital Feedback Eliminator. It gives interface instructions to
other communications equipment.
It is intended that Digital Feedback Eliminator be installed by a trained
telephone, audio, or electrical installer with basic electronic knowledge.
The DFE conforms to common installation practices and preferences found
within the Telcom Electrical and Commercial Sound installers manual.
How to Use This Guide
Before beginning hardware installation, review and understand the guide to
determine how the hardware is to be installed and set. The following
paragraphs summarize each topic within this guide.
■
Overview. This section describes the features and illustrates the
various parts of the DFE. Ordering information is included.
■
Installation of Hardware. This section provides instructions for
mounting the DFE on a wall or table. Detailed instructions for
connection and operation with paging systems is provided.
■
Operation. This section gives information on the unit’s automatic
operation. Switch settings are given for various modes of operation.
■
Maintenance and Customer Support. The industrial grade housing
and quality construction of the Digital Feedback Eliminator virtually
eliminates the need for service or maintenance. There are no
user-serviceable components. Should a problem arise which requires
technical assistance beyond the information provided in this guide, call:
AT&T Technical Support, 1-800-552-3293
AT&T National Technical Marketing, 1-800-222-1313
AT&T National Service Assistance Center, 1-800-628-8888.
Reference Materials
To order additional reference materials, call the AT&T Customer
Information Center:
In the U.S. 1-800-432-6600
In Canada: 1-800-255-1242
1-2 Overview