I've tried for a pretty long time to get faxing to work over SIP and I haven't had the best success either. But.. The Commtrex SmartATA seems to work better then most other ATAs I've used. Also, the Audiocodes HTTPS fax works well but your tied to a vender that can support them like faxsipit, faxback, etc. I also have a FS server running a couple of LUA/Sqlite scripts as a fax 2 email system and an Asterisk system with a a php web form for users to use when sending faxes (I'm going to convert that over to FS when I get more time to work on my LUA script). With the server I get about 80-85% success rate but that includes occasional voice callers as well and it's a bit (in a way) inaccurate because often a fax caller will try 2-3 times if there's a failure. Sometimes a 2nd attempt works and other times it's just 2-3 failures. Anyhow, 85% isn't that great but it's not horrible, I guess.. Also, I'm using flowroute which by the way has outstanding support and they've helped me out A LOT with fax issues. I really want to find some ways to tweak or whatever the system to get in the 90-95% range. I wish I knew enough to debug the various spandsp errors to know if there's something on my side I can change or adjust to improve the success rates. ------ Original Message ------ From: "Sean Devoy" <sdevoy@bizfocused.com> To: "FreeSWITCH Users Help" <freeswitch-users@lists.freeswitch.org> Sent: 5/1/2014 7:51:59 PM Subject: Re: [Freeswitch-users] Is FAXing reliable on FreeSwitch w/ T.38
Thank you Steve. That is exactly how I feel. Unfortunately some financial and legal requirements will allow faxes, but not scanned & emailed documents. At least that is what my client claims.
My planned solution is to take their scans in on FS using T.38 on a SPA2012, run application="rxfax" to a tiff. Then use an "email-to-fax" service to send it. THEY could do "email-to-fax", but that is beyond the capabilities of this "assistant."
-----Original Message----- From: freeswitch-users-bounces@lists.freeswitch.org [mailto:freeswitch-users-bounces@lists.freeswitch.org] On Behalf Of Steven Schoch Sent: Thursday, May 01, 2014 4:35 PM To: FreeSWITCH Users Help Subject: Re: [Freeswitch-users] Is FAXing reliable on FreeSwitch w/ T.38
I'm using a Grandstream HT502, connected via our LAN to FreeSWITCH, and then out via Flowroute. It works sometimes. I'm not that concerned, because the high failure rate helps convince my users to use a more modern solution, like the nice Dell MFP that can scan to PDF.
You would think that someone would make a VoIP FAX machine that plugs directly into a LAN, but I haven't seen anything I'd be willing to buy.
Short summary: Even with a T.38 gateway, VoIP FAX is marginal.
-- Steve
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