Hersent, Olivier. <br/><br/>
IP Telephony :  Packet-based multimedia communications systems / 
Olivier Hersent : David Gurle & Jean-Pirrre Petit. 
 - Delhi :  Pearson,   2003. 
 - xiii, 456p. ;  ill. : 
<br/><br/> Including Index. 
<br/><br/><label>ISBN: </label>9788178082585 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>IP Telephony
<br/><br/><label>Dewey Class. No.: </label>004.6  / HER