ADSL

With its promise of high speed Internet access, Asymmetric Digital Subscriber Line (ADSL) techniques are now making their way out of the laboratory and into the general consumer market. This creates the need for telecommunications professionals to have not just an awareness of the technology, but an in-depth understanding of its workings, its potential, and its applications.
ADSL: Standards, Implementation, and Architecture provides this knowledge with a detailed treatment of current ADSL standards along with overviews of the implementation, marketing, and architectural issues involved in the rollout of ADSL technology. Beginning with an overview of analog and digital communication-including the difficulties of using existing lines for new services-the author discusses the various types of xDSL transmission methods, the specific transmission, equipment, and hardware requirements of ADSL, and devotes considerable attention to the protocols-ATM, Ethernet, and TCP/IP-used in conjunction with ADSL. The final chapter pulls together all of the aspects of ADSL to address software architecture issues, such as nesting protocols, coordinating signaling control with data processes, special real-time issues, and strategies for the migration to ADSL and beyond.
As a collection of topics, ADSL: Standards, Implementation, and Architecture explains why and how ADSL will take its place within the family of data transmission protocols used around the world. It serves as a primary resource for telecommunications professionals who need to know more about ADSL and how they can use it. It also provides technical managers and manufacturers with the ideal reference for an overview of the technology and how it might be applicable to their needs.

Features

• Provides a succinct, realistic evaluation of ADSL with reasoned insights into its most likely applications
  
• Highlights the implementation, marketing, and architectural issues associated with ADSL use and rollout
  
• Includes details of the protocols most likely to be used in conjunction with ADSL - ATM, Ethernet, and TCP/IP
  
• Offers the knowledge and experience of a seasoned implementor, specialist in data communications source code, and respected author

Table of contents

Analog and Digital Communication
Communication Forms
Transmission Media
Switching and Routing
Multiplexing
Infrastructure Limits
Bottlenecks
The xDSL Family of Protocols
From Digital to Analog
Digital Modems
The ITU-T, ADSL, and ISDN
ADSL Standardization
The xDSL Family of Protocols
Summary of the xDSL Family
The ADSL Physical Layer Protocol
CAP/QAM
Discrete Multitone
ANSI T1.413
ADSL 8Litee
ATU-R Versus ATU-C
DSLAM Components
Architectural Components for Implementation
Open Systems Interconnection Model (OSI)
Hardware Components and Interactions
Protocol Stack Considerations
Application Access
Hardware Access and Interactions
Semiconductor Access
Low-Level Drivers
State Machines
ADSL Chipset Interface Example
Signaling, Routing, and Connectivity
Signaling Methods
Routing Methods
Signaling within the DSLAM
ATM over ADSL
B-ISDN (ATM) History, Specifications, and Bearer Services
B-ISDN OSI Layers
ATM Physical Layer
ATM Layer
ATM Adaptation Layer
ATM Signaling
Summary of ATM Signaling
System Network Architecture Group (SNAG)
Frame Relay, TCP/IP, and Proprietary Protocols
Frame Relay
Internet Protocol
Transmission Control Protocol
Proprietary Protocol Requirements
Host Access
Ethernet
Universal Serial Bus
Motherboard Support
Architectural Issues and other Concerns
Multi-Protocol Stacks
Signaling
Standardization
Real-Time Issues
Migration Needs and Strategies
Summary of Issues and Options
References and Selected Bibliography
Index