1. Chapter 20 SONET/SDH

2. Figure 20-1 A SONET System

3. Figure 20-2 An Example of a SONET Network

4. Figure 20-3 SONET Layers

5. Figure 20-4 Device-Layer Relationship in SONET

6. Figure 20-5 Data Encapsulation in SONET

7. Figure 20-6 STS-1 Frame

8. Figure 20-7 STS-1 Frame Overhead

9. Figure 20-8 STS-1 Frame Section Overhead

10. Figure 20-9 STS-1 Frame Line Overhead

11. Figure 20-10 Payload Pointers

12. Figure 20-11 STS-1 Frame Path Overhead

13. Figure 20-12 Virtual Tributaries

14. Figure 20-13 VT Types

15. Figure 20-14 STS-n

16. Figure 20-15 STS Multiplexing

17. Figure 20-16 ATM in an STS-3 Envelope