Acknowledgments | p. xi |
Preface | p. xiii |
Introduction | p. xvii |
Welcome to the Information Superhighway | p. 1 |
The Internet and the Web | p. 8 |
The Web Explodes | p. 15 |
The Rise of the Internet Service Providers | p. 17 |
Woe to the ISPs | p. 21 |
The Public Switched Telephone Network | p. 25 |
A Network Is a Network Is a | p. 26 |
The PSTN: The First Network for the People | p. 31 |
The End of the Bell System | p. 37 |
The Architecture of the PSTN | p. 40 |
The Pieces of the PSTN | p. 44 |
Loops and Trunks | p. 47 |
The Analog PSTN | p. 48 |
Digitizing the PSTN | p. 51 |
Multiplexing and Trunks | p. 53 |
T-carrier | p. 56 |
Integrated Services Digital Network (ISDN) | p. 57 |
Analog Local Loops | p. 59 |
Why Loading? | p. 59 |
Loading and Attenuation | p. 60 |
Other Analog Local Loop Features | p. 62 |
ISDN, Loops, and DAML | p. 64 |
Another Arrangement: CSA | p. 65 |
The Trouble with Analog Local Loops | p. 68 |
Real World Local Loops | p. 68 |
Trunk Groups and the Law of Large Numbers | p. 70 |
Increasing Loads and Trunks | p. 72 |
Packet Switching and Circuit Switching | p. 75 |
Circuit Use and Packet Use | p. 79 |
The Local Exchange Switch and the Internet Router | p. 81 |
Internet Service Providers (ISPs) | p. 86 |
The "Packets on Circuits" Load | p. 87 |
Flat Rate Service | p. 89 |
Typical Residential Network Usage | p. 89 |
Current ISP Traffic Woes | p. 90 |
Switch Blocking | p. 91 |
Is This the Network Needed Today? | p. 91 |
The Trouble with Loops Today | p. 92 |
Possible Solutions | p. 95 |
Overview of 56K Modems | p. 97 |
Overview of Cable Modems | p. 101 |
Pros and Cons of Cable Modems | p. 106 |
Multichannel, Multipoint Distribution System | p. 108 |
Pros and Cons of MMDS | p. 112 |
Local Multipoint Distribution Service (LMDS) | p. 113 |
Pros and Cons of LMDS | p. 117 |
Overview of Satellite Systems | p. 118 |
Pros and Cons of Satellite Systems | p. 119 |
Bluetooth | p. 120 |
Switch-Based Solutions | p. 121 |
ADSL and Other Technologies | p. 122 |
Introducing the DSL Family | p. 125 |
Cooper-Based Solutions | p. 126 |
The DSL Family in Detail | p. 129 |
Another View of the DSL Family | p. 132 |
HDSL and T1 | p. 135 |
HDSL as "Repeaterless T1/E1" | p. 136 |
2B1Q and ISDN | p. 139 |
SDSL | p. 141 |
Enter Asymmetric DSL (ADSL) | p. 143 |
Rate-Adaptive DSL (RADSL) | p. 145 |
G.lite: ADSL/RADSL Without the Splitter | p. 146 |
Very High Data Rate DSL: Newer and Better? | p. 148 |
IDSL and the Integrated Services Digital Network (ISDN) | p. 150 |
DSL Advantages | p. 151 |
Cost Comparison of Various Broadband and Other Technologies | p. 152 |
HDSL and HDSL2 | p. 155 |
The Trouble with T1/E1 | p. 156 |
HDSL Is Born | p. 157 |
HDSL for T1 | p. 157 |
HDSL for E1 | p. 159 |
The HDSL Frame for T1 | p. 160 |
The HDSL Frame for E1 | p. 162 |
Benefits of HDSL | p. 164 |
Uses of HDSL | p. 165 |
HDSL for ISDN | p. 167 |
The Downward Spiral | p. 168 |
HDSL Limitations | p. 169 |
Beyond HDSL: HDSL2 | p. 170 |
The HDSL2 in Detail | p. 171 |
Final Thoughts on HDSL2 | p. 173 |
HDSL2 Power Control | p. 174 |
The Asymmetric Digital Subscriber Line (ADSL) Architecture | p. 177 |
Current ADSL Architectures | p. 180 |
An ADSL Network | p. 183 |
ADSL and Line Code Standards | p. 186 |
Echo Cancellation and DSLs | p. 187 |
CAP and DMT | p. 188 |
How CAP Works | p. 189 |
CAP/QAM Operation | p. 189 |
Quadrature Amplitude Modulation (QAM) | p. 190 |
DMT for ADSL | p. 193 |
DMT Bins | p. 196 |
Discrete Multitone (DMT) Operation | p. 198 |
The ADSL Interface and System | p. 201 |
ADSL Unidirectional Downstream Transport | p. 202 |
ADSL Bidirectional (Duplex) Transport | p. 209 |
Combining the Options | p. 210 |
ADSL Overhead | p. 211 |
The ADSL Superframe | p. 213 |
The ADSL Frame Structure | p. 217 |
Inside the ADSL Frames | p. 221 |
ADSL Possibilities | p. 227 |
ATM End-to-End | p. 230 |
Ethernet to the DSLAM | p. 236 |
PPP With or Without VPNs | p. 239 |
Pure Routing | p. 241 |
The Real World | p. 242 |
ADSL in Action | p. 245 |
ADSL Target Service Speeds: Video | p. 246 |
ADSL Target Service Speeds: Miscellaneous | p. 249 |
ADSL Target Speeds and Distances | p. 250 |
ADSL in the House! | p. 251 |
Installing Full ADSL: Splitter at the Demarcation? | p. 252 |
Installing Full ADSL: Splitter in the PC Board? | p. 254 |
Installing Full ADSL: Low Pass/High Pass Filters? | p. 255 |
Installing Full ADSL: Low Pass Filters for all Phones? | p. 256 |
ADSL Premises Network Issues | p. 258 |
ADSL Premises Networks | p. 261 |
10Base-T Ethernet LAN | p. 261 |
Wireless (IEEE 802.11b) | p. 263 |
Bluetooth | p. 265 |
ADSL Security Issues | p. 266 |
Voice over DSL | p. 269 |
The Other Side of ADSL: The DSLAM | p. 275 |
DSLAM Conceptual Architecture | p. 276 |
The "Typical" DSLAM | p. 280 |
The Expanding Role of the DSLAM | p. 282 |
Do-It-Yourself ADSL | p. 287 |
DSLAMs and SONET/SDH Rings | p. 292 |
DSLAM Configuration Possibilities | p. 294 |
DLC and DSLAMs | p. 299 |
DSL Migration Scenarios | p. 307 |
DSL Migration Architecture | p. 309 |
Migration Urgencies and Priorities | p. 311 |
From Analog Modem to ADSL | p. 312 |
From DLC to ADSL | p. 314 |
From ISDN to ADSL | p. 315 |
Inside ADSL: Using IP for "Full Services" | p. 317 |
Use ATM for "Full Service" ADSL? | p. 318 |
From ADSL to NGDLC | p. 319 |
From ADSL to VDSL | p. 321 |
Very High Data Rate Digital Subscriber Line (VDSL) | p. 323 |
VDSL and ATM | p. 327 |
VDSL/ADSL Downstream Speeds and Distances | p. 329 |
VDSL in Detail | p. 330 |
Current Status of VDSL Specifications | p. 332 |
ANSI | p. 332 |
ETSI | p. 333 |
ITU-T | p. 333 |
VDSL Service Characteristics | p. 334 |
Migration to VDSL | p. 335 |
VDSL Services | p. 337 |
VDSL Deployment | p. 339 |
VDSL Issues | p. 341 |
A VDSL Service Sample | p. 343 |
Outstanding DSL Issues | p. 345 |
DSL Network Issues | p. 346 |
How Should Loop Impairments Such as Loading Coils and DLCs Be Addressed? | p. 347 |
What Will Be the Network of Choice on the Service Side of the DSL Access Multiplexer (DSLAM)? | p. 347 |
How Are DSL Links to Be Tested, Repaired, and Managed? | p. 348 |
What Should Be Done with Non-DSL Telephone Company Solutions? | p. 348 |
How Should Premises Issues About Splitters and Inside Wiring Be Addressed? | p. 349 |
How Should Varying DSL Bit Rates Be Billed Over Time and Among Customers? | p. 349 |
DSL Equipment Issues | p. 350 |
How Should Different DSL Line Coding Methods and Technologies Relate to Each Other? | p. 350 |
How Should DSL Premises Equipment Be Packaged to Ensure Customer Acceptance? | p. 351 |
What Types of Customer Equipment Interfaces Should DSL Devices Support? | p. 351 |
What Is the Best ATM or IP Interface for DSL Access Multiplexers (DSLAM)? | p. 352 |
Where Are the End-to-end, Turnkey DSL Systems? | p. 352 |
How Much Will All This Equipment Cost? | p. 352 |
What About Compatibility Issues? | p. 353 |
DSL Service Issues | p. 353 |
How Should DSL Services Be Priced to Maximize Use and Minimize Payback Periods? | p. 354 |
What Marketing Mechanisms Exist to Identify DSL Target Customers? | p. 355 |
Will DSL Services Simply Shift Bottlenecks Elsewhere in the Network? | p. 355 |
What Impact Will DSL Services Have on Other Provider Revenue Streams? | p. 355 |
Will Slow Deployments Mimic the Glacial ISDN Deployment Pace? | p. 356 |
Can I Change My Voice Provider and Keep My DSL Service Provider? | p. 356 |
Active and Passive NIDs | p. 356 |
Passive NID/Active CPE Issues | p. 358 |
Active NID/Passive CPE Issues | p. 359 |
International Issues and DSL | p. 361 |
Local Loops Outside the United States | p. 363 |
International Wire Gauges | p. 364 |
Kilofeet to Kilometers | p. 365 |
Some Sample Global Local Loops | p. 366 |
Global Local Loops in General | p. 367 |
Infrastructures Around the World | p. 368 |
DSL and International Conditions | p. 369 |
DSL in Europe | p. 370 |
DSL in Asia/Pacific | p. 371 |
Case Studies in DSL Installation | p. 373 |
Sources of Standards and Specification Information | p. 381 |
Index | p. 393 |
Table of Contents provided by Syndetics. All Rights Reserved. |