Hersent, O <br/><br/>
Ip telephony packet-based multimedia communication systems 

 - New York  :  Addison Wesley,  2000. 
 - xviii,456 
<br/><br/><label>ISBN: </label>81-7808-258-6 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer EngineeringInformation Technology
<br/><br/><label>Dewey Class. No.: </label>006.7  / HER