so, I performed the tests myself:
http://txlab.wordpress.com/2013/10/12/freeswitch-performance-on-intel-atom-cpu/
I would say, for a small office PBX the Atom performance is satisfactory.



From: Stanislav Sinyagin <ssinyagin@yahoo.com>
To: FreeSWITCH Users Help <freeswitch-users@lists.freeswitch.org>
Sent: Saturday, October 12, 2013 5:30 AM
Subject: Re: [Freeswitch-users] Intel Atom performance

the ones I've got for testing are about 3 years old. 20 concurrent calls with G722/PCMA transcoding run quite OK.
I will write a detailed test report within the weekend.





From: Guillermo Ruiz Camauer <grcamauer@gmail.com>
To: FreeSWITCH Users Help <freeswitch-users@lists.freeswitch.org>
Sent: Saturday, October 12, 2013 1:15 AM
Subject: Re: [Freeswitch-users] Intel Atom performance

The newest ATOMs have out-of-order execution, and even come in 4 and 8 core versions.  Different amounts of cache also.  Wildly varying TDPs also, from 4W to 20W,


On Fri, Oct 11, 2013 at 7:22 PM, I put the Who? in Mishehu <mishehu@freeswitch.org> wrote:
Also note that at least up until one generation ago on Atom - and possibly still true for the current generation - the processors are all in-order processing.  Something like a Via Nano X2/X4 is going to be out-of-order processing, which *might* give you more bang for your buck.  I have a Via Nano X2 here but all I've done with it so far was some testing of OpenSIPS on it, not Freeswitch yet.

In general knowing the specs necessary for a given build-out depends highly on your usage scenario.  There's no simple equation to plug in.

-Yossi


On 10/10/2013 04:12 PM, Guillermo Ruiz Camauer wrote:
You might want to specify the codecs for transcoding since they are not all the same and also the ATOM processor type, as there are many generations now.

Guillermo


On Thu, Oct 10, 2013 at 5:50 PM, Stanislav Sinyagin <ssinyagin@yahoo.com> wrote:
hi,

can anyone share some useful experience with Intel Atom CPU? If used with FreeSWITCH,

-- what's the maximum number of concurrent transcoding calls without service degradation?
-- maximum CPS without service degradation?
-- maximum size of a conference call (with or without transcoding)

There's a choice of fanless appliances with 1.6 GHz Atom processors, and I wonder how well they can perform as PBX.

thanks





_________________________________________________________________________
Professional FreeSWITCH Consulting Services:
consulting@freeswitch.org
http://www.freeswitchsolutions.com

FreeSWITCH-powered IP PBX: The CudaTel Communication Server
http://www.cudatel.com

Official FreeSWITCH Sites
http://www.freeswitch.org
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--
Guillermo Ruiz Camauer


_________________________________________________________________________
Professional FreeSWITCH Consulting Services:
consulting@freeswitch.org
http://www.freeswitchsolutions.com

FreeSWITCH-powered IP PBX: The CudaTel Communication Server
http://www.cudatel.com

Official FreeSWITCH Sites
http://www.freeswitch.org
http://wiki.freeswitch.org
http://www.cluecon.com

FreeSWITCH-users mailing list
FreeSWITCH-users@lists.freeswitch.org
http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
http://www.freeswitch.org


_________________________________________________________________________
Professional FreeSWITCH Consulting Services:
consulting@freeswitch.org
http://www.freeswitchsolutions.com

FreeSWITCH-powered IP PBX: The CudaTel Communication Server
http://www.cudatel.com

Official FreeSWITCH Sites
http://www.freeswitch.org
http://wiki.freeswitch.org
http://www.cluecon.com

FreeSWITCH-users mailing list
FreeSWITCH-users@lists.freeswitch.org
http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
http://www.freeswitch.org




--
Guillermo Ruiz Camauer

_________________________________________________________________________
Professional FreeSWITCH Consulting Services:
consulting@freeswitch.org
http://www.freeswitchsolutions.com

FreeSWITCH-powered IP PBX: The CudaTel Communication Server
http://www.cudatel.com

Official FreeSWITCH Sites
http://www.freeswitch.org
http://wiki.freeswitch.org
http://www.cluecon.com

FreeSWITCH-users mailing list
FreeSWITCH-users@lists.freeswitch.org
http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
http://www.freeswitch.org



_________________________________________________________________________
Professional FreeSWITCH Consulting Services:
consulting@freeswitch.org
http://www.freeswitchsolutions.com

FreeSWITCH-powered IP PBX: The CudaTel Communication Server
http://www.cudatel.com

Official FreeSWITCH Sites
http://www.freeswitch.org
http://wiki.freeswitch.org
http://www.cluecon.com

FreeSWITCH-users mailing list
FreeSWITCH-users@lists.freeswitch.org
http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
http://www.freeswitch.org