Table of Contents:

Definition and Overview

1. A Short History of Analog Modems

2. The Analog Modem Market

3. Digital Subscriber Line (DSL)

4. xDSL

5. The Modem Market

6. ATM versus IP to the Desktop

7. CAP versus DMT

8. The Future

Self-Test

Glossary

PDF of this tutorial

ADSL
asymmetric digital subscriber line

AMI
alternate mark inversion

ATM
asynchronous transfer mode

CAP
cellular array processor

DAA
data access arrangement

DMT
discrete multitone

DSL
digital subscriber line

FCC
Federal Communications Commission

HDSL
high data rate subscriber line

IP
Internet protocol

LAN
local area network

modem
modulation/demodulation

MPEG
Moving Pictures Experts Group

QoS
quality of service

SDSL
single line subscriber line

SONET
synchronous optical network