1st Edition
Implementation and Applications of DSL Technology
The digital subscriber line (DSL) industry is expanding rapidly and a technology once thought to be only transitional will soon clear $100 billion in total annual service revenue. From the world’s leading DSL experts, Implementation and Application of DSL Technologies builds upon the theory presented in Fundamentals of DSL Technologies to address issues fundamental to the success of DSL technology, including those that sustain DSL development, constraints, and challenges. This highly practical text peers into the blossoming sub-industries, all born of the DSL.
The editors lead with a discussion on splitter circuits and micro-filters and continue by addressing digital chipsets and the capabilities required to mix and match them with various other components. Since testing has become an industry in its own, several chapters describe the various types of testing necessary for service qualification, the evolution of testing and provisioning of services from plain old telephone service, loop qualification, and regulator’s decree of spectrum management. The book gives adequate coverage of DSM technology and describes networks for multiple applications in video, telephony, and Internet data areas and the associated network architectures. In addition, a section on security discusses packet transfer mechanism and voice-over DSL.
Offering a vast array of information not currently in the public domain, Implementation and Application of DSL Technologies provides a rigorous survey of DSL applications that illustrates the profound effect this technology is having on the communications industry. When combined with Fundamentals of DSL Technology, this is the most comprehensive and authoritative source of information on DSL.
xDSL SPLITTERS
Introduction to the Splitter Function
Physical Location of the Splitter Function
Low Pass Filter for POTS—Steady-State Behavior
Low Pass Filter for POTS—Transient Behavior
Low Pass Filter for ISDN
Low Pass Combi-Filter for POTS and ISDN
High Pass Filter
Passive Design Techniques
Active Design
Conclusion
DSL SPECIFIC INTEGRATED CIRCUITS: A SILICON PERSPECTIVE
Fifteen Bumpy Years of DSL IC Developments
A Preliminary Chipset Complexity Assessment from System
Specifications
Chipset Implementations
CO and CPE Products
Conclusions
Acknowledgments
ANALOG FRONT-END
Implementation
DSL System Parameters That Drive
Analog Design
Transmitter Noise Budget
Receiver Noise Budget
Digital-to-Analog Converter
Filtering
Line-Coupling Transformer
Line Driver
Hybrid
Echo Cancellation
Receive Amplifier—Programmable Gain
Amplifier (PGA)
Analog-to-Digital Converter
LOCAL LOOP SIMULATION AND SIMULATORS
History and Background of Loop Simulators
Applications of Wideband Loop Simulators
Simulator Characteristics
Derivation of Equations
Different Types of Loop Simulators
Nonelectrical Characteristics of the Simulator
Recent Advances in Loop Simulator Design
and Specifications
EVOLVING TEST AND PROVISIONING FROM POTS TO xDSL SERVICES
Line Test for POTS
Use of POTS Testing for DSL Services
Access Issues for DSL Testing
Testing the Next Generation Network
Introduction to Reflectometry Measurement
DSL-Specific Line Test
Summary
DSL PLANNING RULES,
LINE QUALIFICATION,
AND DEPLOYMENT ISSUES
Line Qualification for DSL Services
Factors Affecting the Successful
Deployment of DSL Systems
Conclusion
SPECTRUM MANAGEMENT
Common Features
American Spectrum Management
Spectrum Management in Europe
Summary
Appendix on Spectral Compatibility
Calculation
DYNAMIC SPECTRUM MANAGEMENT
History of DSM
Level of Coordination in DSM
Information Necessary for DSM
Application of DSM to Other Systems
DSL ARCHITECTURE: OPPORTUNITIES FOR DIFFERENTIATION AND EVOLUTION
Early DSL Access Architectures
Evolution of the Architecture and DSL
Delivered Services
Concluding Comments
DSLAM ARCHITECTURE AND FUNCTIONALITY
Genesis of the DSLAM
DSLAM Functionality
DSLAM Architecture Considerations
ATM DSLAMs
IP DSLAMs
DSLAM—Continuous Evolution
OPERATIONS, ADMINISTRATION,
AND MAINTENANCE
OAM Concepts
General System Architecture
Layer Model
Controlling and Reporting OAM
SECURITY
Scope
What Are We Worried About?
The “Always-On” versus “Dial-Up”
Network Connection
High-Level Security Requirements
Currently Deployed Security Solutions
Coming Attractions
Sample Next-Generation DSL Security
Framework
DATA PACKETS TRANSPORT OVER DSL
Overview
Key Requirements for Transport of Data Packets
Functional Model of Packet Transport
VOICE OVER DSL: CVODSL,
VoATM, AND VoIP
VoDSL Reference Architecture
General Requirements for VoDSL
Lifeline Service
Channelized Voice over DSL
VoATM over DSL
VoIP over DSL
BONDED DSL
ATM-Based Bonding
Ethernet-Based Bonding
MULTI-LINE MIMO DSL SYSTEM ARCHITECTURES
The Challenges of Crosstalk for Single-Line
and Multiline Systems
FEXT Mitigation Architectures
Point-to-Multipoint Architectures
Performance
Conclusions
DSL STANDARDIZATION
The DSL Standards Organizations
Symmetric DSL
ADSL
VDSL
Handshake
Annex: History of Standardization
Acronyms
Biography
Philip Golden, Herve Dedieu, Krista S. Jacobsen