https://8bd9e53a.aww-3cz.pages.dev/tags/dial/ Recent content in Dial on Aaron's Worthless Words Hugo en Wed, 19 Jan 2011 00:00:00 +0000 https://8bd9e53a.aww-3cz.pages.dev/posts/2011/01/iiuc-notes-inbound-dial-peer-matching/ Wed, 19 Jan 2011 00:00:00 +0000 https://8bd9e53a.aww-3cz.pages.dev/posts/2011/01/iiuc-notes-inbound-dial-peer-matching/ <p>More IIUC notes.  As always, feel free to correct as needed.</p> <p>To match inbound calls to a dial peer, CME (and CUCM?) uses the following steps.</p> <ol> <li>Match DNIS (the dialed number) with the <em>incoming called-address</em> config in the dial peer</li> <li>Match the ANI (the calling number or caller ID) with the <em>answer-address</em> config in the dial peer</li> <li>Match the ANI with the <em>destination-pattern</em> config in the dial peer</li> <li>Match an incoming POTS call to the <em>port</em> config in the dial peer</li> <li>Match dial peer 0</li> </ol> <p>Matching dial peer 0 is bad, and it took me an inquiry on Twitter and a buddy to realize why.  Here are a few highlights as to why.  I believe the full scope of the badness of dial peer 0 is really beyond the IIUC exam.</p>