Wittenberg, Nicholas <br/><br/>
Understanding voice over IP technology 
Nick Wittenberg 
 - Australia  Delmar Cengage Learning  c2009 
 - vii, 387 p. : ill., map ; 24 cm. : + 1 CD-ROM 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>9781435427273 
<br/><br/><label>ISSN: </label>2008938851 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Internet telephony
<br/><br/><label>Dewey Class. No.: </label>004.695 WIT