Collins, Daniel <br/><br/>
Carrier grade voice over IP / 
Daniel Collins 
 - 2nd ed. 
 - India  Tata McGraw-Hill  2003 
 - 522 p. 
<br/><br/> McGraw-Hill networking professional 
<br/><br/><label>ISBN: </label>9780070603233 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Internet telephony
<br/><br/><label>Dewey Class. No.: </label>004.69 COL-D