Douskalis, Bill <br/><br/>
IP Telephony: the integration of robust VOIP services 

 - Singapore  Addison Wesley  2000 
 - xxi, 331p.  
<br/><br/> CDBK866. Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>8178082853 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telephone networks<br/>Voice over IP services