[Freeswitch-users] mod_openzap, sangoma, FAX and HW-HEC

[Steve Underwood]

Hi Moises,

Do you know exactly what the noise reduction does? In an echo canceller 
context I can see a couple of possibilities. I think all of them are 
pretty horrible for what they might do to modem signals. Maybe this has 
something to do with why so many people have problems with both Sangoma 
and Digium boards that use the Octasic echo cancellers.

Steve


On 05/13/2010 03:47 AM, Moises Silva wrote:
> Sorry, the setting should be under [wanpipex] in wanpipex.conf file 
> and NOT in the [wxgx] section.
>
> Moises Silva
> Senior Software Engineer
> Sangoma Technologies Inc. | 50 McIntosh Drive, Suite 120, Markham ON 
> L3R 9T3 Canada
> t. 1 905 474 1990 x 128 | e. moy at sangoma.com <mailto:moy at sangoma.com>
>
>
> On Wed, May 12, 2010 at 3:40 PM, Moises Silva <moises.silva at gmail.com 
> <mailto:moises.silva at gmail.com>> wrote:
>
>     It is implemented and should work as a work-around.
>
>     Having said that, I suggest you to contact Sangoma support
>     (techdesk at sangoma.com <mailto:techdesk at sangoma.com>), the ec chip
>     should detect fax tone and disable its echo-canceling functions.
>     However, some old versions of the driver have a noise-reduction
>     feature enabled by default which also happen to disrupt faxes.
>
>     Try adding this just below TDMV_HWEC=YES option:
>
>     HWEC_NOISE_REDUCTION_DISABLE=YES
>
>     Or upgrade to the latest driver which does this automatically.
>