<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div><span><br></span></div><div>When i worked in an internet provider with asterisk telephony solution - we used Aqua (http://www.sevana.fi) to measure voice quality. several nettops were spread across our network. The nettop called to our asterisk, the asterisk saved this voice file to the disk, then this file was sent to a server with Aqua software which compared this file to its original. then the quality (measured in percents) were sent to Zabbix monitoring. actually this data was used for analisys and it compares two files (not realtime). </div><div><br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: 'times new roman', 'new york', times, serif; background-color: transparent; font-style: normal;">BR,</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: 'times new roman', 'new york',
times, serif; background-color: transparent; font-style: normal;">Dmitry Pavlenko</div><div><br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: 'times new roman', 'new york', times, serif; background-color: transparent; font-style: normal;"><br></div> <div style="font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;"> <div style="font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;"> <div dir="ltr"> <font size="2" face="Arial"> <hr size="1"> <b><span style="font-weight:bold;">From:</span></b> Lenz Emilitri <lenz.loway@gmail.com><br> <b><span style="font-weight: bold;">To:</span></b> Asterisk Users Mailing List - Non-Commercial Discussion <asterisk-users@lists.digium.com> <br> <b><span style="font-weight: bold;">Sent:</span></b> Tuesday, January 8, 2013 2:25 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [asterisk-users] Detect Low Quality Calls -
Realtime<br> </font> </div> <br>
<div id="yiv424693874"><div><br></div><div class="yiv424693874gmail_quote">2013/1/5 joachim <span dir="ltr"><<a rel="nofollow" ymailto="mailto:zoachien@securax.org" target="_blank" href="mailto:zoachien@securax.org">zoachien@securax.org</a>></span><br><blockquote class="yiv424693874gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div class="yiv424693874im"> </div>
You are pretty much limited to measuring the delay and the jitter.<br>
The delay you can somewhat estimate prior to the call (with qualify for example).<br>
The jitter / packetloss you can only figure out when the call is already up for a while. (e.g. you might have no issues the first minute, but maybe packet loss will come in bursts after a minute).<div class="yiv424693874HOEnZb"><div class="yiv424693874h5">
</div></div></blockquote><div><br></div><div>
<div>A few years ago I spoke to a Finnish company that had a commercial solution for automated MOS estimation. So something exists though I have not tested it first-hand.<br></div><div>l.</div><div><br></div></div><div>-- <br>
</div></div><div>Loway - home of QueueMetrics - http://queuemetrics.com<br></div><div>Test-drive WombatDialer beta @ http://wombatdialer.com
</div>
</div><br>--<br>_____________________________________________________________________<br>-- Bandwidth and Colocation Provided by <a href="http://www.api-digital.com/" target="_blank">http://www.api-digital.com</a> --<br>New to Asterisk? Join us for a live introductory webinar every Thurs:<br> <a href="http://www.asterisk.org/hello" target="_blank">http://www.asterisk.org/hello</a><br><br>asterisk-users mailing list<br>To UNSUBSCRIBE or update options visit:<br> <a href="http://lists.digium.com/mailman/listinfo/asterisk-users" target="_blank">http://lists.digium.com/mailman/listinfo/asterisk-users</a><br><br> </div> </div> </div></body></html>