Ishwar Sridharan
2011-Dec-26 16:27 UTC
[asterisk-users] Debugging call quality issues in Asterisk
Hola Asterisk Gurus, We have a telephony server in India which runs CentOS release 5.7 (Final) version with four-span Digium Card, one of which has two E1 PRI line terminating on the server. $ dahdi_hardware pci:0000:07:08.0 wct4xxp+ d161:1420 Wildcard TE420 (5th Gen) For the last couple of weeks on some calls, we've been experiencing call quality issues, specifically on outbound calls. We haven't had any complaints on inbound call quality, and I'm forced to conclude that the issue exists only for outbound calls. We haven't seen a pattern on call quality drops, except that it happens during daytime, when the call volumes are good. A quick look at the system stats(sar) do not report an increase in system activity coinciding with the bad quality calls. $ cat /proc/interrupts; sleep 10; cat /proc/interrupts reports that there are 10k interrupts generated over a period of 10s. So, I guess the issue is probably not with the resources. I might also be looking at all the wrong parameters, being an asterisk/telephony n00b. Would you folks give me pointers on the best way to figure out if the issue is with the PRI line or with the server. Also, why does it happen specifically for outbound calls? Greatly appreciate the help. -- Thanks, Ishwar. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.digium.com/pipermail/asterisk-users/attachments/20111226/c86ecc86/attachment.htm>