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<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
<!ENTITY % BOOK_ENTITIES SYSTEM "JAIN_SLEE_Example_User_Guide.ent">
%BOOK_ENTITIES;
]>

<chapter id="introduction">

	<title>Introduction
		to &THIS.PLATFORM;
		JAIN SLEE &THIS.EXAMPLE;
		Example
	</title>
	<para>This example is a JAIN SLEE application which processes SIP
		Messages from SIP UAs to act as a simple proxy and registrar.</para>
	<para>
		Example implements proxy routines defined in
		<ulink url="http://tools.ietf.org/html/rfc3261#section-16">section 16</ulink>
		and registrar routines defined in
		<ulink url="http://tools.ietf.org/html/rfc3261#section-10">section 10</ulink>
		of RFC3261.
	</para>
	<para>It is not a trivial example as it  provides usage of 
	</para>
	<itemizedlist>
		<listitem>
			<para> child relations</para>
		</listitem>
		<listitem>
			<para> timers</para>
		</listitem>
		<listitem>
			<para> null activities</para>
		</listitem>
		<listitem>
			<para>
				<acronym>SBB</acronym>
				activity context interfaces
			</para>
		</listitem>
		<listitem>
			<para>activity context interfaces variables</para>
		</listitem>
		<listitem>
			<para>
				<acronym>SBB</acronym>
				environment entries
			</para>
		</listitem>
		<listitem>
			<para>
				<acronym>SBB</acronym>
				local interfaces
			</para>
		</listitem>
		<listitem>
			<para>
				<acronym>SBB</acronym>
				local interfaces
			</para>
		</listitem>
		<listitem>
			<para>JAIN SIP RA code</para>
		</listitem>
	</itemizedlist>
	<para>Thus it should be considered as target for more advanced users.</para>
	
	<para>Example service is capable of routing <acronym>SIP</acronym> messages based on
		registrar entries or target domain. Registrar entries are based on
		received <acronym>SIP</acronym> REGISTER request for example local domains.</para>
</chapter>
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