Bellamy, John C. <br/><br/>
Digital telephony / 
John C. Bellamy 
 - 3rd ed. 
 - New York ;  Chichester :  Wiley,  c2003. 
 - xxv, 643 p. :  ill. ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>9814126357 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Digital telephone systems.
<br/><br/><label>Dewey Class. No.: </label>621.385  / BED 2003