Bellamy, John C. <br/><br/>
Digital Telephony   
by John C Bellamy 
 - 3rd ed 
 - New York  John Wiley and Sons  2000 
 - xxv, 643p 
 - Wiley series in telecommunications and signal processing .
<br/><br/><label>ISBN: </label>9780471345718 
<br/><br/><label>Dewey Class. No.: </label>621.385  / P