[Freeswitch-users] Fwd: Major deployment of outbound FAX on latest version of Freeswitch question
Juan Antonio Ibañez Santorum
juanito1982 at gmail.com
Mon Jun 6 11:01:04 MSD 2011
Having FS plus a Sangoma Card with echo cancel, is necessary to disable echo
cancel in order to sending/receiving faxes? How can it be done?
2011/5/12 Steve Underwood <steveu at coppice.org>
> On 05/12/2011 05:21 PM, Juan Antonio Ibañez Santorum wrote:
> > Hello Steve!
> > I would like to ask you one question about fax system. You told
> > that using FS+mod_spandsp could be gotten successful faxing rates over
> > 99%. Looking at your experience, is 99% nearer to 100% or to 99%?
> > Which errors do you find usually on that 1%?
> You can run tests all day in a lab without failure. The real test is how
> well things work against a wide diversity of machines in the real world.
> This http://www.soft-switch.org/spandsp-soft-fax-performance.html says
> something about our testing, and what is achievable. Its quite a lot of
> work to get real reliability numbers. You get a lot of call failures on
> a typical public FAX server due to things like wrong numbers, voice
> calls into a FAX port, people purposefully dropping half completed FAX
> calls, and buggy FAX machines doing weird things. Don't ignore the last
> one. There are famous make machines with serious bugs. You need to
> manually check the failed calls one by one to get real reliability
> figures. In the end there are always a few calls where you are never
> sure who's fault the failure is. All I can say with hand on heart is the
> number of unexplainable failures is well below 1%
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> FreeSWITCH-users at lists.freeswitch.org
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