Smith, Sydney F. <br/><br/>
Telephony and Telegraphy A:  An Introduction to Instruments and Exchanges 
Sydney F. Smith 
 - 2nd. Edition 
 - Bristol  BAS Printers  c1974 
 - xv,282p.;  ill.; 
<br/><br/> Table of contents<br/> <br/>preface<br/><br/>Chapters<br/><br/>1. Telephones and Teleprinters<br/><br/>2. Relays<br/><br/>3.Signalling<br/><br/>4. Switching Systems<br/><br/>5. Strowger System- Selector Mechanism<br/><br/>6.Strowger System- Selector Circuits<br/><br/>7.Traffic and Trunking<br/><br/>8. Distribution Frames<br/><br/>9. Exchange Power Plant 
<br/><br/><label>ISBN: </label>0198593465 
<br/><br/><label>Dewey Class. No.: </label>621.385  / SMI