[Freeswitch-users] Fax to an extension of B leg

Brian West brian at freeswitch.com
Fri Feb 26 19:38:37 UTC 2021

Review this, it may give you a road map

The key here is ignore_early_media=true, you don't want to be in the txfax
app until the remote answers, because you are in a chicken egg scenario
where the fax will fail or t.38 will fail as it will attempt to do so
before the other party answers.


On Fri, Feb 26, 2021 at 12:52 PM Grzegorz Orzeł <grzegorz at orzel.io> wrote:

> Hi folks,
> I have a FreeSwitch serving multiple services. One of them is
> fax2mail/mail2fax. Logic is implemented as a set of lua scripts and it
> works fine. I’d like extend mail2fax direction. Currently it (lua script)
> picks number B, tiff file and sends it directly to B using command
> originate as follows:
> originate {<_bunch_of_headers_>} sofia/service/+4812345678 at some.domain;user=phone
> &txfax(<_tiff_file_path_>) XML <_some_profile_>
> What I’d like to do is to add possibility to dial some other extension
> number. Lest’s say fax is available on +4812345678 but when the call is
> aswered there needs to be dialed number 123.
> I’ve already reviewed all FreeSwitch books on safaribooks,  googled but I
> haven't found any example… :-/
> Maybe it is enough to simply add it to the call url - I mean something
> like:
> originate {<_bunch_of_headers_>} sofia/service/+4812345678,,
> 123 at some.domain;user=phone &txfax(<_tiff_file_path_>) XML <_some_profile_>
> Can you give me some hint how to do that?
> Thanks in advance,
> Grzegorz
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