Johnston, Alan B. <br/><br/>
SIP :  understanding the Session Initiation Protocol / 
Alan B. Johnston. 
 - 2nd ed. 
 - Boston :  Artech House,  c2004. 
 - xxiii, 283 p. :  ill. ;  24 cm. 
 - Artech House telecommunications library .
<br/><br/>Includes references ; appendixes ; index & bibliography. 
<br/><br/><label>ISBN: </label>9781580536554 (hbk.) 
<br/><br/><label>LCCN: </label>2003062956 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer network protocols.<br/>Instant messaging--Computer programs.<br/>Internet telephony--Computer programs.<br/>Multimedia systems--Computer programs.
<br/><br/><label>LC Class. No.: </label>TK5105.55  / .J64 2004 
<br/><br/><label>Dewey Class. No.: </label>004.62  / JOH