Page 9 - Optical Switching And Networking Handbook

01_200023_FM/Bates 1/17/01 10:10 AM Page viii

viii Contents

Chapter 8 High-Speed Applications 185
Add-Drop Multiplexing: A SONET/SDH Application 188
SONET/SDH Topologies 190
Point-to-Point 190
Point-to-Multipoint 193
Hub-and-Spoke 193
Ring 194
Access Methods 195
Alternative Approaches to Multiple Services Delivery 198
What about the Metropolitan-Area Networks? 202
Applications for DWDM 205
Building Block of the Optical Network 206
The Wide-Area Network 211

Chapter 9 Cost Implications and Financial Trending 215

Sometimes It Is the Fiber 217
It Is in the Glass 219
Transparent Optical Networks 222
Opaque Optical Networks 222
DWDM Capabilities 224
Handling the Bandwidth Crunch 226
Optical Cross-Connects 227
Implementing DWDM 229
Costs for the Metropolitan Networks 231
DWDM Application Drivers 232
Future Upgrades 232
Opportunity Costs 233
Faster, Better, Cheaper 234

Chapter 10 The Future of Optical Networking
(Where Is It All Heading?) 237
Changes in Infrastructure 239
Enter the Packet-Switching World 242
Legacy Systems 245
Migration Is the Solution 246
DWDM Created the Sizzle 247
So What About Now? 249
QoS a Reality! 253