My providers are mainly based in Spain so probably the names won't tell you anything. I usually have -almost- perfect T38 results against Cisco and Huawei hardware (provider gateway), and avoiding providers with SONUS, NEC and ex-NORTEL products (CS2K). The most important would probably have a quality Internet connection, if using lower speed ADSL you should probably not share the limited bandwidth/upload with other uses unless you know how to properly configure traffic shaping (we use linux routers + HFSC and it works very well!). Some people just use low-cost hosting such as OVH and online.net with very good results as well.

Regards,
--
François

On Fri, 2014-07-11 at 16:30 +0000, bruce@sqls.net wrote:
 
Thanks for the information.  Would you be willing to share more information? Like the SIP providers you're using, type of internet connection, hardware, etc?  I would understand if you can't share everything.  But seeing that you seem to be having excellent success I would be very interested to know your setup in more detail - might give me some ideas on things to implement or improve.
 
I do like the combo of FreeSWITCH/SpanDSP  + Scripts.  I've really liked the lua scripting integration that lets me add console commands and stats info right into the fs_cli tool.  So, very encouraging news.
 
 
 
------ Original Message ------
From: "François Delawarde" <fdelawarde@wirelessmundi.com>
To: freeswitch-users@lists.freeswitch.org
Sent: 7/11/2014 10:53:00 AM
Subject: Re: [Freeswitch-users] [OL]Re: best way to receive FAXs
 
After extensive testing using decent SIP providers (with or without T38), we have much better success with spandsp than hylafax. We even have a better success rate compared to most combinations of ATA + physical fax machine we tested!!

No tweaks needed, and using default values (use-ecm=true, disable-v17=false).

Feature-wise it's not really comparable to a Hylafax solution, but with a few scripts to manage queues and such, you can build a very nice solution able to handle a huge fax volume!

Regards,
--
François Delawarde <fdelawarde@wirelessmundi.com>
Wireless Mundi S.L.


On Fri, 2014-07-11 at 15:13 +0000, bruce@sqls.net wrote:
 
Great, thanks for the idea! I'll definitely give this a try as well.
 
Also, great looking project :) I'll take a look at it as well. I've been wanting to learn more about golang too. I've used Hylafax in the past but I haven't used it lately - I probably should take another look at that as well.
 
 
 
------ Original Message ------
From: "Markus Lindenberg" <markus.lindenberg@gmail.com>
To: "FreeSWITCH Users Help" <freeswitch-users@lists.freeswitch.org>
Sent: 7/11/2014 8:33:00 AM
Subject: Re: [Freeswitch-users] [OL]Re: best way to receive FAXs
 

On Fri, Jul 11, 2014 at 3:11 PM, <bruce@sqls.net> wrote:
For received faxes I get a lot more failures then I would like however, close to 15%

I had some success with disabling T.38 for received calls. If i see that negotiation failed multiple times or the fax aborts with errors during page transmission, I save the callerid and disable T.38 when the caller retries. Most cases that were not successful with T.38 worked fine with soft modem. See https://github.com/gonicus/gofaxip#fallback-from-t38-to-spandsp-softmodem for details. 


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