Hi all,<br><br>We are running Asterisk <a href="http://1.2.7.1">1.2.7.1</a> on our Dell Poweredge 2850 and are having massive sound quality issues.<br><br><span class="postbody">We are experiencing call quality issues for our
remote location, namely calls cutting out and breaking up for our
agents. The two main issues seem to be 'popping' and 'dropping' - popping would be pops and crackles on the line, where dropping would be complete audio dropouts. Most of the time, these issues are occuring on ONE end of the audio stream.
<br><br>The building houses about 60 users, 30 or so of which are on
calls at any one time. The location is connected to our main office via
a 10Mbit low-latency fiber trunk, and gigabit switches on either side
of the fiber endpoints. The floor at the remote location is all
100Mbit. Each user is running a Dell Optiplex 170L, 2.8GHz or greater,
XP SP2, 256MB RAM, and Eyebeam 1.10n for their softphone, with ulaw as
the codec. We have several managers that use Polycom IP501's, and they also are experiencing the issues.<br>
<br>Server is a Dell Poweredge 2850, 2 x 2.8GHz Zeons, 4GB RAM, 73GB x 2 u320 hard drives in RAID-1, with a hotspare. Running a stock Fedora Core 4 install, with only mysql and apache running. Disabled ACPI and framebuffer, and have the Sangoma card interrrupting on CPU0 only, all other devices interrupting on CPU1. Using onboard gig-E NIC with current drivers.
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We are connected to the PSTN through a Sangoma A104D (current firmware), using E&M Wink signalling. Sangoma drivers are the current 2.3.4-beta drivers recommended by Sangoma.<br>
<br>I have spent the past three days working on this issue, and have
opened the issue with Sangoma and Counterpath - neither has been very helpful. I have been monitoring
our bandwidth closely - we're averaging around 3.5Mbit, so we should
have plenty available. Sangoma statistics aren't showing anything out of the ordinary - the system is performing as it should. <br>
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We have two other servers that are identical in configuration that
serve the main office, and they have no sound quality issues whatsover
- the only difference between the server having the issues and the ones
that aren't is the connection to the users - one is a local LAN
connection, the other is the WAN.
<br><br>I have set up an extension that calls the milliwatt app, and records the call to a file. I can call in from either a Zap or SIP channel and have sound quality issues, so the network is probably not causing the issue - a purely Zap channel still experiences pops and drops. Same with a purely SIP channel. The recorded call doesn't seem to reflect the audio issues - in other words, pops on the phone are not necessarily recorded into the file.
<br><br>We also have every call being recorded via the Monitor app - that was disabled early this morning to see if some of the issues with Monitor were causing problems - that made no difference either.<br><br>We just upgraded from
1.2.4 to <a href="http://1.2.7.1">1.2.7.1</a> about a half hour ago - so far, no difference.<br><br>If I cannot come up with something by close of business today, I will completely rebuild the server from scratch, something I am not excited about doing.
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Otherwise, if anyone has any suggestions, questions, comments, or encouragement, I am in dire need of any/all.<br><br>wes<br>whaut at fc500 dot com<br></span>