Wallace, Kevin <br/><br/>
Implementing Cisco unified communications voice over IP and QoS (Cvoice) foundation learning guide 
Kevin Wallace 
 - USA  Cisco Press  2011 
 - 696 p. 
<br/><br/><label>ISBN: </label>9781587204197 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronic data processing personnel--Certification
<br/><br/><label>Dewey Class. No.: </label>004.695