Bellamy, John, C. <br/><br/>
Digital Telephony 

 - 3 
 - NEW YORK  Wiley  2000 
 - xxv+643P.,24X17cms., 
<br/><br/><label>ISBN: </label>9814126357 
<br/><br/><label>Dewey Class. No.: </label>621.385 B4355