[Freeswitch-users] mod_g729

David Knell dave at 3c.co.uk
Thu Jan 22 21:09:32 PST 2009

Steve Underwood wrote:
> Depends what you are after. Speex offers the quality of G.729 at around 
> the same processing load. However, nobody seems to want to pay for the 
> processing load of G.729. Almost everything uses G.729A. Half the 
> processing load, but significantly poorer quality.
> VoIP is mostly a race to the bottom, and people wonder why it makes no 
> money for provides. :-\
And, at the wholesale level, it makes no sense whatsoever to compress calls
any more: bandwidth is so cheap (and has been for a while) that the loss in
call quality - especially from tandem compressions - and the increased
processing requirements and other bits of expense do not stack up.  Case in
point: we moved a route from G.711 to G.729, and saw the ACD drop from
over 10 to under 7 minutes.  It was a route to mobiles, so the audio was 
recompressed with the GSM codec on its way to the handsets.  Economically,
had we carried on using G.729, we'd have lost about 30% of our margin on
that route.


David Knell, Director, 3C Limited
T: 020 8114 5002  F: 020 3002 7257  M: 07773 800623

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.freeswitch.org/pipermail/freeswitch-users/attachments/20090123/a2af423c/attachment-0002.html 

More information about the FreeSWITCH-users mailing list