<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12pt">800 calls at 64kbps is 51Mbps. <br>Could there be a network issue, like a 100Mbps line between the endpoints?<br><br>How heavy is your CPU load? "htop" command would be helpful in this.<br><br><br><div><span><br></span></div><div><br></div> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12pt;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12pt;"> <div dir="ltr"> <hr size="1"> <font face="Arial" size="2"> <b><span style="font-weight:bold;">From:</span></b> Grant Bagdasarian <GB@cm.nl><br> <b><span style="font-weight: bold;">To:</span></b> "FreeSWITCH Users Help (freeswitch-users@lists.freeswitch.org)" <freeswitch-users@lists.freeswitch.org> <br>
<b><span style="font-weight: bold;">Sent:</span></b> Tuesday, October 22, 2013 10:14 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> [Freeswitch-users] Audio quality issues<br> </font> </div> <div class="y_msg_container"><br><div id="yiv6659450688"><style><!--
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--></style><div><div class="yiv6659450688WordSection1"><div class="yiv6659450688MsoNormal">Hello,</div><div class="yiv6659450688MsoNormal"> </div><div class="yiv6659450688MsoNormal">I was wondering what the maximum concurrent calls for FS before audio quality becomes an issue? I assume the specs of the machine would also affect this.</div><div class="yiv6659450688MsoNormal">We are currently running FS on a Six Core (12 Threads) Intel E5-2430 CPU and get about 800 concurrent calls at 10-20 CPS. The audio quality at these rates is still fair, but we do notice some quality issue’s. </div><div class="yiv6659450688MsoNormal">Going above these numbers screws up the audio quality: choppy sound, audio drops etc. We aren’t doing any heavy media processing, just simply playing a file (G711-Alaw) which lasts about 2 minutes during the load test.</div><div class="yiv6659450688MsoNormal">These numbers are for one way audio, where Sipp doesn’t echo the RTP
back. These numbers get lower once Sipp echo’s the RTP.</div><div class="yiv6659450688MsoNormal"> </div><div class="yiv6659450688MsoNormal">I’ve tried FS on a physical box and also on a virtual box (ESXi 5.1), but the performance gain on physical vs virtual isn’t that much. </div><div class="yiv6659450688MsoNormal"> </div><div class="yiv6659450688MsoNormal">I disabled all the modules we don’t need, like CDR’s, conferencing, etc.</div><div class="yiv6659450688MsoNormal"> </div><div class="yiv6659450688MsoNormal">Are there any parameters(config files)/modules that can affect the quality of the audio stream?</div><div class="yiv6659450688MsoNormal"> </div><div class="yiv6659450688MsoNormal">Regards,</div><div class="yiv6659450688MsoNormal"> </div><div class="yiv6659450688MsoNormal">Grant</div><div class="yiv6659450688MsoNormal"> </div><div class="yiv6659450688MsoNormal">
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