Kaza, Ramesh <br/><br/>
Cisco IP telephony:  Planning, design, implementation, operation, and optimization 

 - Indianapolis:   Cisco press,   2005. 
 - xxiii, 648 p. :  graf.;  
<br/><br/><label>ISBN: </label>1587051575 9781587051579 
<br/><br/><label>Subjects--Topical Terms: </label><br/>TELEFONIA POR INTERNET<br/>COMUNICACIONES