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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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<td class="notification-comment-pattern-container mobile-resize-text" style="padding: 0px; border-collapse: collapse; padding: 0px"><strong>Change comment:</strong> requirements and assumptions</td> 
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<td class="content-excerpt-pattern-container mobile-resize-text " style="padding: 0px; border-collapse: collapse; padding: 0 0 0 24px"> <h1 id="TheMostBasicPBX-RequirementsandAssumptions" class="diff-block-target" style="margin: 10px 0 0 0; margin-top: 0; font-size: 24px; font-weight: normal; line-height: 30px; margin: 40px 0 0 0; margin-top: 0"> <span class="diff-html-added" id="added-diff-0" style="font-size: 100%; background-color: #ddfade;">Requirements and Assumptions</span> </h1> <p class="diff-block-target diff-block-context" style="margin: 10px 0 0 0">While it won't be anything to brag about, this basic PBX that you will build from Asterisk will help you learn the fundamentals of configuring Asterisk.</p> <p class="diff-block-target diff-block-context" style="margin: 10px 0 0 0">For this exercise, we're going to assume that you have <span class="diff-html-removed" id="removed-diff-0" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">access to two </span><span class="diff-html-added" id="added-diff-2" style="font-size: 100%; background-color: #ddfade;">the following:</span> </p> <p class="diff-block-target diff-block-context" style="margin: 10px 0 0 0"> <strong><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">A machine, virtual or real, with Asterisk already installed.</span></strong> </p> <p class="diff-block-target diff-block-context" style="margin: 10px 0 0 0"> <span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">Got here without installing Asterisk? Head back to the </span><a class="confluence-link unresolved" href="#" style="color: #3b73af; text-decoration: none"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">Installation Asterisk section</span></a><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">.</span> </p> <p class="diff-block-target diff-block-context" style="margin: 10px 0 0 0"> <strong><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">Two or more </span><span class="diff-html-changed" id="changed-diff-0" style="background-color: #d6f0ff;">phones which speak the SIP voice-over-IP protocol.</span></strong> </p> <p class="diff-block-target diff-block-context" style="margin: 10px 0 0 0"> <span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;"> </span> </p> <p class="diff-block-target diff-block-context" style="margin: 10px 0 0 0">There are a wide variety of SIP phones available in many different shapes and sizes, and if your budget doesn't allow for you to buy phones, feel free to use a free soft phone. <span class="diff-html-removed" id="removed-diff-1" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">Soft phones </span><a href="http://en.wikipedia.org/wiki/Softphone" class="external-link" rel="nofollow" style="color: #3b73af; text-decoration: none"><span class="diff-html-added" id="added-diff-4" style="font-size: 100%; background-color: #ddfade;">Softphones</span></a><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;"> </span>are simply computer programs which run on your computer and emulate a real phone, and communicate with other devices across your network, just like a real voice-over-IP phone would. <span class="diff-html-added" id="added-diff-5" style="font-size: 100%; background-color: #ddfade;">If you do use a soft phone, remember to watch out for software firewalls blocking traffic from or to the system hosting the softphone.</span> </p> </td> 
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<td class="footer-pattern-links mobile-resize-text" style="padding: 0px; border-collapse: collapse"><a href="https://wiki.asterisk.org/wiki/users/removespacenotification.action?spaceKey=AST&src=email" title="" style="color: #3b73af; text-decoration: none">Stop watching space</a></td>
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