Davidson, Jonathan. <br/><br/>
Voice over IP fundamentals  
Jonathan Davidson, James Peters, with contributions by Brian Gracely. 
 - New Delhi :  Techmedia,  c2001. 
 - xx, 373 p. :  ill. ;  24 cm. 
 - Cisco Press fundamentals series .
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>1578701686 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Internet telephony.
<br/><br/><label>Dewey Class. No.: </label>004.6