<div dir="ltr">Hello Binni,<div>It is hard to say anything without more information.</div><div>You need to understand what happens in those dropped calls.</div><div><br></div><div>Logs would help. Traces might help also. Try mirror the traffic to another server and capture it using tcpdump, or even run tcpdump on the server itself.</div><div><br></div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Dec 16, 2014 at 3:05 PM, Brynjólfur Þorvarðsson <span dir="ltr"><<a href="mailto:binni@binni.eu" target="_blank">binni@binni.eu</a>></span> wrote:<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang="EN-GB" link="#0563C1" vlink="#954F72"><div><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><span lang="IS">Hello all<u></u><u></u></span></p><p class="MsoNormal"><span lang="IS"><u></u> <u></u></span></p><p class="MsoNormal">Over the last couple of months we’ve been experiencing a strange problem, which I’ve been unable to solve.<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">We have an Asterisk 1.4.19 that’s been running happily for the last several years. All calls go through an AGI server from dialplan.<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">On average we have appr. 3000 incoming calls/day. All calls go in via the AGI server, various sound files and menus are played, and every single call ends up in a queue.<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Every now and then, when one of our SIP customer answers a call from his/her queue, the call is connected but hangs up in 6 seconds (seems surprisingly constant). Both ends of the call can hear each other for a second or two (not as many as 6 seconds) before the call hangs up.<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">The frequency of this happening is difficult establish precisely, we have some 40 customers, and they don’t always tell me when this happens. The worst I have heard of is this morning, where one of our customers experienced 1 in 4 calls having this problem. Last week the frequency for this customer was more in the region of 1 in 50.<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">In all cases the second attempt seems to succeed, i.e. the originating caller tries again and gets through “properly” the second time.<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">I have not been able to find anything in the log files for Asterisk or the AGI server. I’ve not run a SIP trace, as this would be a major undertaking with our traffic and the sporadic nature of the problem – but if all else fails, I’ll try that!<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">At one point I thought it might be a problem with RTP channels and tried setting them to default values, but that has not had any effect. The sound goes through fine in both directions, but only for a couple of seconds.<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">I hope someone here will be able to help me!<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Thanks in advance.<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Binni<u></u><u></u></p></div></div><br>--<br>
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