Telephone Network: Wcb/mcgraw-hill The Mcgraw-hill Companies, Inc., 1998

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Figure 8-17

WCB/McGraw-Hill

Telephone Network

 The McGraw-Hill Companies, Inc., 1998

Figure 8-18

WCB/McGraw-Hill

 The McGraw-Hill Companies, Inc., 1998

Figure 8-19

WCB/McGraw-Hill

 The McGraw-Hill Companies, Inc., 1998

Figure 8-20

Analog Switched Service

WCB/McGraw-Hill

 The McGraw-Hill Companies, Inc., 1998

Figure 8-21

Analog Leased Service

WCB/McGraw-Hill

 The McGraw-Hill Companies, Inc., 1998

Figure 8-22

WCB/McGraw-Hill

Analog Hierarchy

 The McGraw-Hill Companies, Inc., 1998

Figure 8-23

WCB/McGraw-Hill

 The McGraw-Hill Companies, Inc., 1998

Figure 8-24

WCB/McGraw-Hill

Switched/56 Service

 The McGraw-Hill Companies, Inc., 1998

Figure 8-25

WCB/McGraw-Hill

DDS

 The McGraw-Hill Companies, Inc., 1998

Figure 8-26

DS Hierarchy

WCB/McGraw-Hill

 The McGraw-Hill Companies, Inc., 1998

Figure 8-27

T-1 Line

WCB/McGraw-Hill

 The McGraw-Hill Companies, Inc., 1998

Figure 8-28

WCB/McGraw-Hill

T-1 Frame

 The McGraw-Hill Companies, Inc., 1998

Figure 8-29

Fractional T-1 Line

WCB/McGraw-Hill

 The McGraw-Hill Companies, Inc., 1998

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