x ◾ Contents
10.2.2.2 First-Generation Optical Networks ............................................327
10.2.2.3 Second-Generation Optical Networks ....................................... 328
10.2.2.4 ird-Generation Optical Networks ......................................... 328
10.2.2.5 Expanding the Infrastructure to Support Higher Capacity ........329
10.2.2.6 SONET Technology ................................................................. 330
10.2.2.7 Next-Generation SONET and Related Optical Architectures ....332
10.2.2.8 DWDM Systems ........................................................................338
10.2.2.9 DWDM Opportunities and Application Scope ......................... 340
10.2.2.10 DWDM Technological Advances .............................................. ...