Bellamy, John,  1941- <br/><br/>
Digital telephony 
John Bellamy 
 - New York  Wiley  c1982 
 - xviii, 526 p.  ill.  25 cm. 
<br/><br/> Includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Digital communications<br/>Digital modulation<br/>Telephone switching systems, Electronic
<br/><br/><label>Dewey Class. No.: </label>621.385