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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Hmm.. I would be very interested to see how introducing NAT into
the picture and having Asterisk do the actual NAT fixups for the media stream
would impact this (if at all). <o:p></o:p></span></p>
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color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
asterisk-dev-bounces@lists.digium.com [mailto:asterisk-dev-bounces@lists.digium.com]
<b>On Behalf Of </b>Di-Shi Sun<br>
<b>Sent:</b> Wednesday, October 22, 2008 7:36 PM<br>
<b>To:</b> asterisk-dev@lists.digium.com<br>
<b>Subject:</b> [asterisk-dev] asterisk with osp performance test results<o:p></o:p></span></p>
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<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>All,<o:p></o:p></span></p>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>In 2007 we
published the results of a performance test of Asterisk as a Back to Back User
Agent (B2BUA). Based on the helpful feedback from the mailing list we improved
our test procedures and re-ran a new performance test case of Asterisk
configured as a B2BUA.<o:p></o:p></span></p>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Our test
platform hosting Asterisk was a $1000 Dell PowerEdge 840 with a Quad Core Xeon
X3220, 2x4M cache, 2.40 GHz, 1066 MHz FSB and 4 GB RAM. Redhat V5 was the
operating system. The test was configured to simulate a wholesale VoIP
operation with three minute call durations and an average of two call retries
for every completed call. This was an "out of the box" Asterisk
configuration with default settings and no optimizations. <o:p></o:p></span></p>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>We found
that Asterisk on the test server could handle approximately 1000 simultaneous
calls with no codec transalation. This works out to be about a $1 per port
investment for a B2BUA platform.<o:p></o:p></span></p>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>When calls
were transcoded from G.711 to G.729, the call capacity fell to 320 simultaneous
calls. With the added cost of of the G.729 codec royalty and the lower call
capacity, the cost increases to approximately $13.50 per port<o:p></o:p></span></p>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>You can
download the test results and all the test plan details from:<o:p></o:p></span></p>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><a
href="http://www.transnexus.com/White%20Papers/Performance_Test_of_Asterisk_v1-4.htm">http://www.transnexus.com/White%20Papers/Performance_Test_of_Asterisk_v1-4.htm</a><u><span
style='color:blue'><o:p></o:p></span></u></span></p>
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<p class=MsoNormal><u><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Di-Shi
Sun<br>
VoIP Routing, Accounting, Security<br>
<a href="http://www.TransNexus.com">www.TransNexus.com</a></span></u><u><o:p></o:p></u></p>
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