<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div><div>Thanks for the valuable information.</div><div><br></div><div>G711 consumes about ~80 kbit/sec per channel / one way, you can easily measure this using vnstat -l.</div><div><br></div><div>So in your case of 200 channels, you need 80*2*200 = 32 Mbit/sec and if you have 100 Mbit network without other major applications, then network should not be a constraint.</div><div><br></div><div>But as was already mentioned many times, it depends of many factors, so difficult to say why the voice is garbled.</div><div><br></div><div>Maybe someone with more expertise could advise.</div><div><br></div><div>P.S. Just wondering if anybody on this list can tell the maximum number of channels which they managed to achieve on a single server, without compromising the quality?</div><div>And what was the server's configuration and codecs used.</div><div><br></div><div>Best luck.</div><div><br></div><div>Vitalie</div></div></div><div><br></div><div><br></div><div><br></div><div><br><div><div>On Dec 14, 2011, at 2:34 PM, Jeff Ullman wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">That's good questions Vitalie. I consider worst case scenario with G711 which really takes much more than advertised 64KB , in fact I feel goes beyond 100KB. I know it make no sense but sometime I don't' know if other (DB etc..) traffic is killer here. We might move to gig bandwidth environment soon so bandwidth shouldn't' be problem. <div>
<br></div><div>On my current server (Quad Core 2376 2.3GHz , 4GM RAM) , I start getting garbled voice ( all kind of delays ) on 200 channels usage and it's all pcmu. </div><div><br></div><div><br><br><div class="gmail_quote">
On Wed, Dec 14, 2011 at 10:50 AM, Vitali Colosov <span dir="ltr"><<a href="mailto:vetali100@gmail.com">vetali100@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Which codec is used?<br>
<br>
Did you get a chance to measure the total bandwidth consumed when all 1000 channels are active?<br>
<br>
Are there any minor or major voice quality problem?<br>
<br>
Thanks<br>
Vitalie<br>
<div><div></div><div class="h5"><br>
On Dec 14, 2011, at 9:51 AM, Craig N. Zimmerman wrote:<br>
<br>
> I currently have production box that I tested for 1000 conferencing channels.<br>
><br>
> Specs are:<br>
> CPU: AMD Phenom X6 Hexa Core Processor<br>
> Speed: 6 Processor Cores, 2.8 GHz (Turbo 3.3 GHz)<br>
> RAM: 8GB DDR3<br>
><br>
> Hope this gives you an idea big you need to go.<br>
><br>
> The More CPU & Bandwidth to the server the better!<br>
> Thanks<br>
> Craig Zimmerman<br>
><br>
><br>
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