1. Chapter 14 Switching Circuit Switching Packet Switching Message Switching WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998

2. Figure 14-1 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 Switched Network

3. Figure 14-2 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998

4. Figure 14-3 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 Circuit-Switched Network

5. Figure 14-4 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 Switch

6. Figure 14-5 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 Folded Switch

7. Figure 14-6 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998

8. Figure 14-7 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 Crossbar Switch

9. How many crosspoints are needed in a single-stage switch with 40 inputs and 50 outputs? a.40 b.50 c.90 d.2000

10. Figure 14-8 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 Multistage Switch

11. Figure 14-9 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 Switching Path

12. Figure 14-9-continued WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 Switching Path

13. Comparison 15-by-15 single stage crossbar –Needs ? crosspoints 15-by-15 multistage crossbar –Needs ? crosspoints

14. Comparison 15-by-15 single stage crossbar –Needs 225 crosspoints 15-by-15 multistage crossbar –Needs 78 crosspoints (30+18+30). Three first stage switches, each with 10 crosspoints(5*2), for a total of 30 crosspoints. Two second stage switches, each with 9 crosspoints(3*3), for a total of 18 crosspoints. Three third stage switches, each with 10 crosspoints(5*2), for a total of 30 crosspoints.

15. Figure 14-10 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 TDM without TSI (Time slot Interchange

16. Figure 14-10-continued WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 TDM with TSI

17. Figure 14-11 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 Time-Slot Interchange

18. SPACE-AND TIME-DIVISION SWITCHING COMBINATIONS

19. Figure 14-12 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 TST Switch

20. Figure 14-13 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998

21. Figure 14-14 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 Datagram Approach

22. Figure 14-15 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 Datagram Approach, Multiple Channels

23. VIRTUAL CIRCUIT APPROACH

24. 1.SWITCHED VIRTUAL CIRCUIT 2.PERMANENT VIRTUAL CIRCUIT

25. Figure 14-16 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 Switched Virtual Circuit

26. Figure 14-16-continued WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 Switched Virtual Circuit

27. Figure 14-16-continued WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 Switched Virtual Circuit

28. Permanent virtual circuits Permanent connection for the duration of the lease

29. Figure 14-17 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 Message Switching