Principles of voice & data communications 
Bates, Regis J. 
 -  McGraw-Hill Irwin,  2007 
 - xxviii, 782 p. 
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<br/><br/><label>ISBN: </label>0-07-225732-6 (alk. paper) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication.
<br/><br/><label>Dewey Class. No.: </label>621.382 B31p 2007