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Digital Subscriber Line (DSL) Testing

Definition and Overview

Definition

The use of existing copper to deliver high-speed data and voice services is the prime advantage of xDSL transmission technologies. At the same time, the existing outside plant (OSP) also presents a number of significant challenges for network operators. Deploying xDSL services is dependent on the quality and design of the OSP. Prequalification of copper loops is necessary to determine if the loop is capable of supporting xDSL transmission to avoid costly attempts at service turn-up.

Overview

This tutorial addresses xDSL technologies and their implementation. The tutorial will open with a discussion of xDSL's primary benefit—namely, that xDSL uses existing copper wiring to deliver high-speed data and voice services. A discussion will follow concerning the challenges—which include existing OSP, prequalification, load coils, bridge taps, loop length, and noise—for network operators employing xDSL.

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DOWNLOAD PDF of this tutorial RELATED PRODUCT PROFILES: Cornet Technology, Inc. - SL-2000 Digital Subscriber Line (DSL) Test Access Switch

TABLE OF CONTENTS: Definition and Overview 1 Need for xDSL Loop Prequalification 2 Methodologies for xDSL Loop Prequalification 3 xDSL Testing Needs 4 Discussion of Load Coils 5 Measurement of Line Length 6 Bridge Tap Detection 7 Crosstalk, Metallic Fault, and Longitudinal Balance Testing 8 Gaining Access to the Copper Loop for Test 9 References Self-Test Correct Answers Glossary Comment on This Tutorial