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

 - 3rd 
 - New Delhi  Willey  2000 
 - xxv, 643p 
<br/><br/> 643 
<br/><br/><label>ISBN: </label>9788126509294 
<br/><br/><label>Subjects--Topical Terms: </label>
<br/><br/><label>Dewey Class. No.: </label>621.385  / BED