Porter, Thomas. <br/><br/>
Practical VoIP Security  [electronic resource] / 
Thomas Porter, et al. 
 - Rockland, MA :  Syngress Publishing,  c2006. 
 - xxviii, 563 p. :  ill. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>9780080489551 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Internet telephony--Security measures.<br/>Telecommunication.
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Electronic books.
<br/><br/><label>LC Class. No.: </label>TK5105.8865  / .P67 2006