Douskalis, Bill  <br/><br/>
IP Telephony  

 - Pearson education   Delhi   2002 
 -  350 
<br/><br/><label>ISBN: </label>81-7808-285-3  
<br/><br/><label>Subjects--Topical Terms: </label><br/>TELEPHONY 
<br/><br/><label>Dewey Class. No.: </label>621.385 7 DOU