Johnston, Alan B. <br/><br/>
SIP :  understanding the Session Initiation Protocol / 
Alan B. Johnston. 
 - 3rd ed. 
 - Boston :  Artech House,  c2009. 
 - xxix, 395 p. :  ill. ;  24 cm. 
 - Artech House telecommunications library .
<br/><br/>Includes references and index. 
<br/><br/><label>ISBN: </label>9781607839958 (hbk.) 
<br/><br/><label>LCCN: </label>2010286955 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer network protocols.<br/>Instant messaging--Computer programs.<br/>Internet telephony--Computer programs.
<br/><br/><label>LC Class. No.: </label>TK5105.55  / .J64 2009 
<br/><br/><label>Dewey Class. No.: </label>620.50289  / JOH