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<td id="header-avatar-image-container" valign="top" style="padding: 0px; border-collapse: collapse; vertical-align: top; width: 32px; padding-right: 9px"><a href="https://wiki.asterisk.org/wiki/display/~rnewton?src=email" style="color: #3b73af; text-decoration: none"><img id="header-avatar-image" class="image_fix" src="cid:avatar_925838d3d8b1f71935f30b314c925d64" height="32" width="32" border="0" style="border-radius: 3px; vertical-align: top" /></a></td>
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<p style="margin: 10px 0 0 0; margin-top: 0">Under Construction</p>
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</div> <h1 id="ConfiguringSubscriptionswithchan_sip-Overview" style="margin: 10px 0 0 0; font-size: 24px; font-weight: normal; line-height: 30px; margin: 40px 0 0 0">Overview</h1> <p style="margin: 10px 0 0 0">This page is intended to be a brief guide on configuring chan_sip and Asterisk to accept subscriptions for presence (in this case, Extension State) and notify the subscribers of state changes.</p> <h1 id="ConfiguringSubscriptionswithchan_sip-Requirements" style="margin: 10px 0 0 0; font-size: 24px; font-weight: normal; line-height: 30px; margin: 40px 0 0 0">Requirements</h1>
<ul style="margin: 10px 0 0 0">
<li>Assumes you understand the basics of Device State and Extension State</li>
<li>You have already configured SIP peers, and/or Presence State identifiers.</li>
</ul> <h1 id="ConfiguringSubscriptionswithchan_sip-Process" style="margin: 10px 0 0 0; font-size: 24px; font-weight: normal; line-height: 30px; margin: 40px 0 0 0">Process</h1> <h2 id="ConfiguringSubscriptionswithchan_sip-Overview.1" style="margin: 10px 0 0 0; font-size: 20px; font-weight: normal; line-height: 30px; margin: 40px 0 0 0; margin-top: 10px">Overview</h2>
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<p style="margin: 10px 0 0 0; margin-top: 0">It is best to consider this configuration in the context of a very simplified use case. It should illustrate the overall concept, as well as the ability for Extension State to aggregate Device States.</p>
<p style="margin: 10px 0 0 0">The case is that our administrator wants the user device of SIP/Alice to display the presence of Bob. Bob has two devices, SIP/Bob-mobile and SIP/Bob-desk. He could be on either device at any one time, so we want to map them both to the same Hint. That way, when Alice subscribes to the Hint, she'll get the aggregated Extension State of Bob's devices. That means if either of Bobs phones are busy, then the extension state will be busy. Then Alice knows that Bob is busy without having to have a separate light for each of Bob's phones.</p>
<p style="margin: 10px 0 0 0">Figure 1 should illustrate the overall relationships of the different elements involved.</p>
<h2 id="ConfiguringSubscriptionswithchan_sip-ConfigureSIPoptions" style="margin: 10px 0 0 0; font-size: 20px; font-weight: normal; line-height: 30px; margin: 40px 0 0 0">Configure SIP options</h2>
<p style="margin: 10px 0 0 0">Since this is not a guide on configuring SIP peers, we'll show a very simple <strong>sip.conf</strong> with only enough configuration to point out where you might set specific <a href="https://wiki.asterisk.org/wiki/display/AST/chan_sip+State+and+Presence+Options" style="color: #3b73af; text-decoration: none">chan_sip State and Presence Options</a> .</p>
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<pre style="margin: 10px 0 0 0; margin-top: 0">[general]
callcounter=yes
[Alice]
type=friend
subscribecontext=default
allowsubscribe=yes
[Bob-mobile]
type=friend
busylevel=1
[Bob-desk]
type=friend
busylevel=1</pre>
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<h2 id="ConfiguringSubscriptionswithchan_sip-ConfigureHints" style="margin: 10px 0 0 0; font-size: 20px; font-weight: normal; line-height: 30px; margin: 40px 0 0 0">Configure Hints</h2>
<p style="margin: 10px 0 0 0">As shown in the <a href="https://wiki.asterisk.org/wiki/display/AST/Extension+State+and+Hints" style="color: #3b73af; text-decoration: none">Extension State and Hints</a> section, hints are configured in Asterisk dialplan (extensions.conf). We need to define a hint mapping 6001 to Bob's devices.</p>
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<pre style="margin: 10px 0 0 0; margin-top: 0">[default]
exten = 6001,hint,SIP/Bob-mobile&SIP/Bob-desk</pre>
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<b>Figure 1</b>
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<p style="margin: 10px 0 0 0; margin-top: 0"> <span id="gliffy-container-29687809-4177" class="gliffy-container " data-fullwidth="531" data-ceoid="29392926" data-filename="ExtensionAndDeviceState"> <span class="gliffy-chrome-container"> <span class="gliffy-chrome "> <span class="gliffy-item gliffy-first"> <img class="gliffy-logo" src="/wiki/download/resources/com.gliffy.integration.confluence/icons/logo_16x16.png" title="Gliffy" alt="Gliffy" /> Gliffy </span> </span> </span> <map id="gliffy-map-29687809-4402" name="gliffy-map-29687809-4402"></map> <img id="gliffy-image-29687809-4177" class="gliffy-image " width="531" height="545" data-full-width="531" data-full-height="545" src="/wiki/download/attachments/29392926/ExtensionAndDeviceState.png?version=3&modificationDate=1401915487666&api=v2" alt="ExtensionAndDeviceState" usemap="#gliffy-map-29687809-4402" /> <map id="gliffy-dynamic-map-29687809-4177" class="gliffy-dynamic" name="gliffy-dynamic-map-29687809-4177"></map> </span> </p>
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</div> <p style="margin: 10px 0 0 0"> <br /> <br /> </p> <h2 id="ConfiguringSubscriptionswithchan_sip-ConfigureSubscriber" style="margin: 10px 0 0 0; font-size: 20px; font-weight: normal; line-height: 30px; margin: 40px 0 0 0">Configure Subscriber</h2> <p style="margin: 10px 0 0 0">todo: a SIP user agent (soft-phone, hard-phone, another phone application like Asterisk) to subscribe to the SIP peer</p> <h2 id="ConfiguringSubscriptionswithchan_sip-Operation" style="margin: 10px 0 0 0; font-size: 20px; font-weight: normal; line-height: 30px; margin: 40px 0 0 0">Operation</h2> <p style="margin: 10px 0 0 0">todo: show, subscription process, NOTIFYs for change of state</p> <p style="margin: 10px 0 0 0"> </p> </td>
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</body>
</html>