http://sales.thesipschool.com/sip/rss http://sales.thesipschool.com/sip/show/2#post2 <p>The Session Inititation Protocol is a signaling protocol that has become the standard for all IP telephony devices.</p><br><br>Posted to: What is SIP? <a href="http://sales.thesipschool.com/sip/show/2#post2">Show Thread</a> | <a href="http://sales.thesipschool.com/sip/show/2#post2">Post Reply</a> Wed, 28 Oct 2009 06:41:33 +0000 http://sales.thesipschool.com/sip/show/2#post2