Bates, Regis J. <br/><br/>
Principles of Voice & Data Communications / 
Regis J. Bates, Marcus Bates. 
 - Boston :  McGraw-Hill Irwin,  c2007. 
 - xxviii, 782 p. :  ill. ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0072257326 (alk. paper) 9780072257328 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication.
<br/><br/><label>Dewey Class. No.: </label>621.382  / BAT