<div style>Hola Asterisk Gurus,</div><div style><br></div><div style>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.</div>
<div style><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px"><br></div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px">$ dahdi_hardware </div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px">
pci:0000:07:08.0 wct4xxp+ d161:1420 Wildcard TE420 (5th Gen)</div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px"><br></div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px">
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.</div>
<div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px"><br></div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px">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. </div>
<div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px"><br></div><div><font class="Apple-style-span" color="#222222" face="arial, sans-serif">$ cat /proc/interrupts; sleep 10; cat /proc/interrupts</font></div>
<div><font class="Apple-style-span" color="#222222" face="arial, sans-serif">reports that there are 10k interrupts generated over a period of 10s. So, I guess the issue is probably not with the resources. </font><span class="Apple-style-span" style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px">I might also be looking at all the wrong parameters, being an asterisk/telephony n00b.</span></div>
<div><font class="Apple-style-span" color="#222222" face="arial, sans-serif"><br></font></div><div><font class="Apple-style-span" color="#222222" face="arial, sans-serif">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.</font></div>
<div><font class="Apple-style-span" color="#222222" face="arial, sans-serif"><br></font></div><div><font class="Apple-style-span" color="#222222" face="arial, sans-serif">--</font></div><div><font class="Apple-style-span" color="#222222" face="arial, sans-serif">Thanks,</font></div>
<div><font class="Apple-style-span" color="#222222" face="arial, sans-serif">Ishwar.</font></div></div>