[asterisk-users] G729: TC400B vs Software Encoder

[Jim Boykin]

We run asterisk on c2d 2.66GHz so looks like we should be fine with
software encoder. Just to give you more details, below is the relevant
row from the translation table (using digium g.729 software encoder).
Any estimate on how many simultaneous calls we should be able to make
using g.729 and ilbc code without taxing quality.

> core show translation
Translation times between formats (in microseconds) for one second of data
          Source Format (Rows) Destination Format (Columns)

            g.729       iLBC
slin     - 2999     -  7999


Thanks
Jim


On Sat, Dec 5, 2009 at 8:59 PM, Tilghman Lesher <tlesher at digium.com> wrote:
> On Saturday 05 December 2009 08:25:53 Jim Boykin wrote:
>> Thanks. What do you suggest for system with 15 max simultaneous calls?
>
> As long as your machine is at least a single CPU, 2GHz or better, you should
> be fine with the software encoder.  The TC400 is really only necessary on
> systems where the transcoding load alone would overtax the CPU.  It's really
> difficult to estimate a good number of where you should start considering the
> TC400, because there are so many other tasks where the CPU may be required
> and would affect the overall result, but the number is probably somewhere
> north of 40 simultaneous calls.
>
> I'm sure somebody will chime in and say they're using 100 simultaneous calls
> on the software encoder alone.  As I said, the number is extremely fungible,
> based upon what else the CPU is doing.
>
> --
> Tilghman Lesher
> Digium, Inc. | Senior Software Developer
> twitter: Corydon76 | IRC: Corydon76-dig (Freenode)
> Check us out at: www.digium.com & www.asterisk.org
>
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