Bryant, Russell <br/><br/>
Asterisk : the definitive guide 

 - 4 
 - New Delhi  Shroff Publishers  2013 
 - xii, 160p.  
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>9789351101567 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ACD Queues<br/>Aserisk architecture<br/>Asterisk -- Open source telephony platform(Linux)<br/>Asterisk and VoIP<br/>Integrated telecommunication applications<br/>IVR Design