> broadband Voice wrote:
>>
>>
>> On 12/27/07, *broadband Voice* <broadbandvoice@gmail.com
>> <mailto:broadbandvoice@gmail.com>> wrote:
>>
>> I am using Asterisk and A2billing Calling Card Platform and after
>> the 6th call the quality starts to degrade. The way it set up is
>> the user calls into the system then dial out so I have 12 channels
>> being used up but 6 active calls. Here are my specs Asterisk
>> SVN-branch-1.4-r79142 on a i686 running Linux Fedora 6, Pentium 4
>> Hyper-Threading, 64 bit, 1GB of RAM, 80 GB Sata Drive, bandwidth 4
>> Mbps (1300GB/Throughput) burstable to 100Mbps.
>>
>> I am planning on upgrading to Intel Core 2 Duo with a clock speed
>> of 1.8GHZ and 2GB Ram. Does anyone have similar situation or
>> advice? Thanks.
>>
>>
>
> Your system should be able to handle that volume easily.
>
> What are you using for PSTN connectivity?
>
> I have heard of people having issues with Hyperthreading. That could be
> a problem, although I have never had any issues myself.
>
> What does top look like?
>
> When I had a similar issue (voice quality while running monitor on over
> seventy calls) I found a small Linux CLI app, I cannot remember the name
> of it but it would give IO stats (I think it may be named IOStat or
> something similar) and I could see right where the bottleneck was
> (obviously disc IO but I was able to see exactly where the breaking
> point was). That may help identify something.
Try:
vmstat 1
IIRC, iostat is a *BSD type utility, but it's been many years since I
touched BSD!
It is possible to graph disk IO as well as network packet IO if required
using (eg) MRTG.
Gordon
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