Bellamy, John, C  <br/><br/>
Digital telephony  

 - 3rd  
 - John wiley & sons   New York   2008 
 -  369 
<br/><br/><label>ISBN: </label>81-265-0929-5  
<br/><br/><label>Subjects--Topical Terms: </label><br/>TELEPHONY 
<br/><br/><label>Dewey Class. No.: </label>621.385 7 BEL