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

 - 3rd  
 -  John wiley And sons   2011 
 - 643 
<br/><br/><label>ISBN: </label>0 
<br/><br/><label>Subjects--Topical Terms: </label><br/><br/>
<br/><br/><label>Dewey Class. No.: </label>621.385  / BEL