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

[Moises Silva]

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


On Wed, May 12, 2010 at 3:40 PM, Moises Silva <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), 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.
>
> 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
>
>
>
> On Wed, May 12, 2010 at 1:24 PM, Anthony Minessale <
> anthony.minessale at gmail.com> wrote:
>
>> openzap has an app you can run to disable EC but i don't know if it's
>> implemented into the sangoma plugin but its not hard to fix if it's not.
>>
>>
>> On Wed, May 12, 2010 at 11:47 AM, Helmut Kuper <helmut.kuper at ewetel.de>wrote:
>>
>>> -----BEGIN PGP SIGNED MESSAGE-----
>>> Hash: SHA1
>>>
>>> Hello,
>>>
>>>
>>> I'm not sure whether I'm right here or not. But maybe someone has faced
>>> same problem:
>>>
>>>
>>> Scenario A:
>>> I'm using Sangoma A104d and FreeSWITCH Version 1.0.head (17097:17188M).
>>> I enabled hardware based detection of fax and dtmf. Further hardware
>>> based HEC is enabled
>>>
>>> I'm not able to reveive a FAX (analog) via PSTN, while sending works and
>>> internal (SIP) works as well. So there is no problem with the ATAs I use
>>> nor with the network (which routes the RTP along 80 kilometers one way).
>>>
>>> Scenario B:
>>> I'm able to receive FAX from pstn with same setup, but have hardware
>>> based HEC disabled. So in this case everything works fine.
>>>
>>>
>>> I thought sangoma's hardware based Fax detection feature should have
>>> disabled HEC when a Fax is detected, but it doesn't seems so. So my
>>> current thoughts are about the question whether FS is able to disable
>>> hardware HEC via mod_openzap and wanpipe driver for the corresponding
>>> A104d channel, when FS knows that the target is a FAX device ...
>>>
>>>
>>> -----BEGIN PGP SIGNATURE-----
>>> Version: GnuPG v1.4.7 (MingW32)
>>>
>>> iD8DBQFL6tu84tZeNddg3dwRAur3AJ4rOw5ocXm+aGG7spLYtA4yx23eHACfcUPF
>>> K+VHsbNiCR0XQeztzeI4iTY=
>>> =ihsg
>>> -----END PGP SIGNATURE-----
>>>
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>>
>>
>>
>> --
>> Anthony Minessale II
>>
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>>
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>>
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>
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