[asterisk-biz] Asterisk Performance Results

[Jim Dalton]

> > We recently performed an indepth performance test on 
> Asterisk V1.4.11 
> > configured as a SIP B2BUA.
> > 
> > Asterisk was running on a server with two Xeon 5140, dual 
> core, 2.33 
> > GHz CPUs and 4 GB of RAM.
> > 
> > We found that an Asterisk B2BUA on this hardware can manage 1500 
> > simultaneous calls with no transcoding and 400 simultaneous 
> calls with 
> > G.711 to G.729 transcoding.
> > 
> > A summary of the test is available at
> > 
> http://www.transnexus.com/White%20Papers/asterisk_V1-4-11_performance.
> > htm
> > The test details are available at
> > 
> http://www.transnexus.com/White%20Papers/Asterisk_Performance_as_a_SIP
> > _B2BUA
> > .pdf
> > 
> > Jim Dalton
> > www.transnexus.com
> 
>
> Alistair Cunningham wrote:
>
> Jim,
> 
> Thank you for publishing this; it's most useful to the 
> Asterisk community. Did you make any measurements of voice 
> quality (jitter, packet loss, subjective listening tests by a 
> human) at high loads? From a brief read at your PDF document, 
> I didn't see anything on this - my apologies if I've missed it.
> 

Very good question and quick reading!  This issue is not addressed in the
test plan.  

To check for voice quality we performed subjective listening test at high
loads and the quality was good.  

We spent some time trying to think of a simple way to quantitatively measure
voice quality during the test, but could not come up with a practical
solution that was easy and affordable.  We would appreciate any input on
easy ways to collect voice quality data.