Collins, Daniel <br/><br/>
Carrier grade voice over IP 

 - 2nd ed 
 - New Delhi  Tata McGraw-Hill  2005 
 - xviii, 522p. 
<br/><br/> (McGraw-Hill Networking and communications 
<br/><br/><label>ISBN: </label>0-07-060323-5 
<br/><br/><label>Subjects--Index Terms: </label>Computer science  Internet telephony  VO IP  Voice over IP 
<br/><br/><label>Universal Decimal Class. No.: </label>004.738.5.057.4  / COL