Ahson, Syed A. <br/><br/>
VoIP Handbook: applications, technologies, reliability, and security 
Syed A Ahson 
 - New York  CRC Press  2009 
 - xv, 454p. 
<br/><br/><label>ISBN: </label>1420070207 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Network Security
<br/><br/><label>Dewey Class. No.: </label>005.8 AHS