Hersent, Olivier. Petit, Jean, Pierre. Gurle, David. <br/><br/>
IP Telephony: Deploying Voice-over-IP Protocols 

 - Chichester  Wiley  2005 
 - xxxiii+382p.,25x17Cm 
<br/><br/><label>ISBN: </label>0470023597 
<br/><br/><label>Dewey Class. No.: </label>621.385 H572