Meggelen, Jim Van. <br/><br/>
Asterisk :  the future of telephony / 
Jim Van Meggelen, Leif Madsen, and Jared Smith. 
 - 2nd  ed. 
 - Cambridge :  O'Reilly,  2007. 
 - xxv, 574  p. 
<br/><br/><label>ISBN: </label>0596510480 : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Asterisk (Computer file)<br/>Internet telephony.