The document discusses various telecommunications topics including data transmission connectors, balanced and unbalanced transmission modes, canceling noise, modem standards, and modulation techniques. It includes figures and diagrams related to these topics without further description.

1. Figure 6-14 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 DB-37 and DB-9 Connectors

2. RS-423: Unbalanced Mode Figure 6-15 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998

3. RS-422: Balanced Mode Figure 6-16 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998

4. Canceling Noise Figure 6-17 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998

5. DB-15 Connector Figure 6-18 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998

6. Figure 6-19 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 Modem

7. Bandwidth for Telephone Line Figure 6-20 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998

8. Baud Rate for Half-Duplex ASK Figure 6-21 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998

9. Baud Rate for Full-Duplex ASK Figure 6-22 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998

10. Baud Rate for Half-Duplex FSK Figure 6-23 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998

11. Baud Rate for Full-Duplex FSK Figure 6-24 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998

12. Bell Modems Figure 6-25 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998

13. Bell Modems Figure 6-25-continued WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998

14. ITU Modems Figure 6-26 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998

15. ITU Modems Figure 6-26-continued WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998

16. V.22bis 16-QAM Constellation Figure 6-27 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998

17. V.32 Constellation Figure 6-28 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998

18. V.33 Constellation Figure 6-29 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998