Olivier Hersent <br/><br/>
IP telephony   packet-based multimedia communications systems 

 - 1st 
 - New Delhi<br/>  Addison Wesley  2001 
 - 456p. 
<br/><br/><label>ISBN: </label>8178082586 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Engineering and aflied sciences
<br/><br/><label>Dewey Class. No.: </label>621.3981  / HER