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</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=IS>Hello all<o:p></o:p></span></p><p class=MsoNormal><span lang=IS><o:p> </o:p></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.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></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.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></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.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></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.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></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.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></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.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></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!<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></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.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I hope someone here will be able to help me!<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks in advance.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Binni<o:p></o:p></p></div></body></html>