Kaza, Ramesh. <br/><br/>
Cisco IP telephony :  planning, design, implementation, operation and optimization / 
by Ramesh Kaza & Salman Asadullah. 
 - xxiii, 648 p.;  ill. :  24 cm. 
<br/><br/><label>ISBN: </label>9781587142833 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronic data processing--Management.<br/>Internet telephony.