On 05/02/2014 10:32 AM, bruce@sqls.net wrote:
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. 85% success rate on the first try is appalling. You should be getting well below 1% failures on any half decent setup.
Regards, Steve