<div dir="ltr"><div class="gmail_default" style="color:#660000">If you were running on Asterisk 1.4, a Zaptel or Dahdi timing source (including the Sangoma USB device) was necessary to avoid sometimes unreliable timing from the "dummy" interface.</div>
<div class="gmail_default" style="color:#660000"><br></div><div class="gmail_default" style="color:#660000">For modern releases (1.6, 1.8, 11, 12, etc) this isn't necessary for most systems. However, you may have better results with such a large number of calls by using a hardware timing source. The difference will vary between different systems and loads -- I recommend testing it on your own platform. Note that changing to a different model with a different motherboard or even just a different chipset can result in a difference in timing accuracy.</div>
<div class="gmail_default" style="color:#660000"><br></div><div class="gmail_default" style="color:#660000"> -- so your best option is to try it both ways under load to see if you see a benefit, and re-test should you change the platform, such as using a different motherboard.</div>
<div class="gmail_default" style="color:#660000"><br></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Wed, Jul 30, 2014 at 4:08 AM, babak <span dir="ltr"><<a href="mailto:bk1379@yahoo.com" target="_blank">bk1379@yahoo.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div style="color:#000;background-color:#fff;font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:12pt">
<div>Hi<br>I am evaluating some voice broadcasting solutions based on Asterisks for more than 1000 simultaneous calls.<br>Connection to Asterisk all are based on SIP and SIP Trunks so no DAHDI hardware is required.<br>According to some recommendations like <a href="http://osdial.org/howto/" target="_blank">http://osdial.org/howto/</a> "Internal timing is very critical with Asterisk when it is under load"<br>
and we must use DAHDI hardware or "USB Voice Synch Tool" <a href="http://www.sangoma.com/accessories/specialty-tools/" target="_blank">http://www.sangoma.com/accessories/specialty-tools/</a><br>But according to my understanding of wiki <a href="https://wiki.asterisk.org/wiki/display/AST/Timing+Interfaces" target="_blank">https://wiki.asterisk.org/wiki/display/AST/Timing+Interfaces</a><br>
It seems it is not necessary now.<br>Please tell me your opinions.<br><br>Regards<br><br></div><div><br></div></div></div><br>--<br>
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