Bellamy, John, <br/><br/>
Digital telephony / 
John Bellamy 
 - 3rd edition 
 - 643 pages :  24 cm. 
 - Wiley series in telecommunications and signal processing .
 - Wiley series in telecommunications and signal processing .
<br/><br/><label>ISBN: </label>0471345717  9780471345718 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Digital telephone systems