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Table of Contents:

Definition and Overview

1. Introduction

2. ISDN

3. HDSL

4. SDSL

5. CAP RADSL

6. DMT ADSL

7. Spectral Compatibility of CAP RADSL with DMT ADSL

8. T1 AMI

9. Summary

10. Appendix

11. References

Self-Test

Glossary

PDF of this tutorial

Definition
The spectral compatibility of two digital subscriber line (DSL) systems is defined by the effect of crosstalk that one DSL system has on another in cable.

Overview
This tutorial presents an overview of the spectral compatibility of the various DSL systems deployed in the network, which include integrated services digital network (ISDN), high-rate DSL (HDSL), symmetric DSL (SDSL), discrete multitone (DMT) asymmetric DSL (ADSL), carrierless amplitude and phase modulation (CAP) rate adaptive DSL (RADSL), and T1 alternate mark inversion (AMI). The tutorial also includes an overview of the spectral compatibility of the different DSL services deployed in the loop plant. Included are discussions on the loop-plant environment, cable models, crosstalk models, descriptions of the various DSL spectra, and the compatibility of the various spectra with the DSL services in the cable. Although DSL systems have been designed for the North American, European, and international markets, the focus of discussion in this tutorial is primarily on the spectral compatibility of DSL in the North American network. The concepts in this tutorial are applicable to the European and other international networks.