Bates (Bud), Regis J..  <br/><br/>
Voice and Data Communications Handbook /  
Bates (Bud) Regis J., Gregory Donald W.. 
 - 3 edition. 
 - New York :   McGraw-Hill,   2000. 
 - XXIV, 998 s.:   il.;   24 cm. 
<br/><br/><label>ISBN: </label>0072122765