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2This package implements the main protocol abstractions that are defined by the SIP RFC 3261.
3These include the following main ones:
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5<li>SIPServerTransaction -- an implementation of the Server Transaction State Machine (Chapter 17 of RFC 3261).
6<li>SIPClientTransaction -- an implementation of the Client Transction State Machine (Chapter 17 of RFC 3261).
7<li>SIPDialog -- an implementation of the SIP Dialog ( Chapter 11 of RFC 3261 ).
8</ul>
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10SIPTransactionStack is the container that holds references to these protocol objects.
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