Flanagan, William A. <br/><br/>
VoIP and unified communications :  internet telephony and the future voice network / 
William A. Flanagan 
 - Hoboken, N. J. :  Wiley,  c2012 
 - xv, 298 p. :  ill. ;  24 cm. 
<br/><br/>Includes index 
<br/><br/><label>ISBN: </label>9781118019214 
<br/><br/><label>Subjects--Topical Terms: </label><br/>nternet telephony