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<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">Hi,</p>
<p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; "> </p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" text-decoration: underline;">Today's Asterisk+DAHDI state:</span></p>
<ul style="margin-top: 0px; margin-bottom: 0px; margin-right: 0px; -qt-list-indent: 1;"><li style=" margin-top:12px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">If a single channel/span breaks...</li>
<li style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">On the next asterisk restart -- no DAHDI channels at all!</li>
<li style=" margin-top:0px; margin-bottom:12px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">Is it acceptable in 2013?</li></ul>
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<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">This could have been fixed for years.</p>
<p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; "> </p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" text-decoration: underline;">What happened on the DAHDI side?</span></p>
<ul style="margin-top: 0px; margin-bottom: 0px; margin-right: 0px; -qt-list-indent: 1;"><li style=" margin-top:12px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">In <a href="http://lists.digium.com/pipermail/asterisk-dev/2008-July/033805.html"><span style=" text-decoration: underline; color:#0057ae;">2008</span></a> this problem was presented, with proposed solution.</li>
<li style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">Few months later we had a <a href="http://svnview.digium.com/svn/dahdi?view=revision&revision=5443"><span style=" text-decoration: underline; color:#0057ae;">prototype</span></a> of the DAHDI side.</li>
<li style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">Tried to revive interest in <a href="https://gitorious.org/asterisk-tools/dahdi-linux/commit/6e5f2bb05fd309bacab570c80e6304b487d9c19b"><span style=" text-decoration: underline; color:#0057ae;">2010</span></a>.</li>
<li style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">In 2011 Shaun Raffle started a big revamp of DAHDI in different direction. This resulted in the <a href="http://lists.digium.com/pipermail/asterisk-dev/2011-October/051954.html"><span style=" text-decoration: underline; color:#0057ae;">pinned-spans</span></a> scheme which was part of DAHDI-<span style=" font-weight:600;">2.6.0</span>.</li>
<li style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">Since Nov-2011, it also included the required fixes for DAHDI-tools (see the dahdi_cfg '-S<span>' and '-C<chan_list>' options).</li>
<li style=" margin-top:0px; margin-bottom:12px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">Which means DAHDI is "ready" -- each channel/span may be handled independently of the others.</li></ul>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" text-decoration: underline;">What happened in Asterisk?</span></p>
<ul style="margin-top: 0px; margin-bottom: 0px; margin-right: 0px; -qt-list-indent: 1;"><li style=" margin-top:12px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">Dynamic channel removal (DAHDI_EVENT_REMOVED)was added some eons ago (in the Zaptel days).</li>
<li style=" margin-top:12px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">It had a bug with D-Channels. Tzafrir uploaded a fix to <a href="https://reviewboard.asterisk.org/r/726/"><span style=" text-decoration: underline; color:#0057ae;">review-board (726)</span></a> some 3 years ago -- it still lingers there instead of being applied to all supported asterisk versions.</li>
<li style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">Dynamic channel addition code was uploaded to <a href="https://reviewboard.asterisk.org/r/1598/"><span style=" text-decoration: underline; color:#0057ae;">review-board (1598)</span></a> in Nov-2011 and keeps waiting there...</li>
<li style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">With these patches, Asterisk+DAHDI is fully dynamic, where we can add/remove channels and spans at run-time without affecting the PBX.</li>
<li style=" margin-top:0px; margin-bottom:12px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">But non of this is committed to trunk :-(</li></ul>
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<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">So with all the multi-year effort to solve this problem, we are still in square-one.</p>
<p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; "> </p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">Releasing Asterisk 12 in this state is a major failure in my book.</p>
<p style=" margin-top:12px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">Are your customers happy when a single channel failure make the whole PBX drop dead? If not, why don't you review those patches?</p>
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<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">Sorry for the not-so-happy tone, but...</p>
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<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">-- </p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">Oron Peled Voice: +972-4-8228492</p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">oron@actcom.co.il http://users.actcom.co.il/~oron</p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"> "A standard for copy protection is as premature</p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"> as a standard for teleportation."</p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"> --- Noted computer security expert and</p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"> Princeton University Professor</p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"> Edward Felten.</p>
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