Collins, Daniel <br/><br/>
Carrier grade voice over IP / 
by Daniel Collins 
 - Boston :  McGraw-Hill,  2001. 
<br/><br/><label>ISBN: </label>0071189696   
<br/><br/><label>Subjects--Index Terms: </label>Carrier Grade Electrionics Internet Standards 
<br/><br/><label>Dewey Class. No.: </label>621.38782