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

Anthony Minessale anthony.minessale at gmail.com
Wed May 12 10:24:54 PDT 2010

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:

> 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 ...
> Version: GnuPG v1.4.7 (MingW32)
> iD8DBQFL6tu84tZeNddg3dwRAur3AJ4rOw5ocXm+aGG7spLYtA4yx23eHACfcUPF
> K+VHsbNiCR0XQeztzeI4iTY=
> =ihsg
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Anthony Minessale II

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