On Jan 20, 2011, at 8:53 PM, Steve Underwood > On 01/21/2011 06:46 AM, Bryant Zimmerman wrote: >> On 01/20/2011 11:47 AM, Steve Underwood >> On 01/20/2011 11:11 PM, Kevin P. Fleming wrote: >> > On 01/19/2011 02:30 PM, Bryant Zimmerman wrote: >> >> On 01/19/2011 02:05 PM, Bryant Zimmerman wrote: >> >>> I am working on some fax tools for some of my users. I am reading the >> >>> https://wiki.asterisk.org docs for faxing. >> >>> Is see Application_SendFax and Application_SendeFax has one been >> >> discondinued? >> >>> Any feed back on using the res_fax module would be apperciated. Any >> >> examples or >> >>> other. >> >> >> >> *From*: "Jason Parker" <jpar...@digium.com> >> >> *Sent*: Wednesday, January 19, 2011 3:19 PM >> >> There was a typo in the res_fax documentation. Application_SendeFax >> >> should be >> >> the correct documentation. I don't know where Application_SendFax is >> >> coming >> >> from - it's probably old. When the next import happens, >> >> Application_SendFax >> >> should be replaced by the correct version (then I'll try to remember to >> >> remove >> >> the bogus SendeFax copy). >> >> >> >> Jason thanks for the clarification on this. >> >> >> >> If I start my development with the res_fax_spandsp.so module. Should all >> >> of my code be compatible with the res_fax_digium.so module? I want to be >> >> able to get things running and tested and move to the digium supported >> >> option in the future. >> > >> > The choice of technology module is mostly irrelevant; that was the >> > whole point of splitting res_fax out from them. If you use the >> > applications and other features of res_fax, it won't matter which >> > underlying technology module is loaded. >> > >> Well, people do get problems with the Digum FAX software, which go away >> when they switch to spandsp. Its best to test with the code you intend >> to deploy. >> >> Steve >> >> Steve is there any real compelling reason to res_fax_digium.so over the >> res_fax_spandsp.so? >> I was thinking Digium module was likely to be better is this wrong based on >> what people are seeing? > Feature wise they are similar, using an Asterisk release. By adding patches > from the bug tracker, spandsp can work as a T.38 gateway, which the current > Digium code cannot. I assumed by now Digium would have launched a V.34 > version of their FAX module, which is something a free version can't do for a > few more years, but there seems no sign of that happening. People tell me > spandsp is more flexible in its TIFF file handling, but I've never found any > documentation on what the Digium file handling is supposed to be capable of. > Speed wise I have no comparisons. There are people running hundreds of > concurrent FAXes all day using spandsp on quad core servers with good disk > setups. I have no idea how fast the Digium software can be. > > Performance wise I've helped people get off the Digium FAX software, and > start using spandsp, to get around problems. A couple of people were > frequently finding only the first 1/4 or so of each page in the output file, > when the received T.38 stream was perfect (i.e. I could play a PCAP of the > session into spandsp, and get a perfect TIFF file). Those people complained > that the only support offered by Digium was an offer of a refund. I've help a > couple of people who regularly see weird T.38, which the Digium FAX was > handling in a very ungraceful way. Spandsp handled it badly too at that time, > but the latest spandsp snapshots do a good job. > > To be fair, I only get contacted when the Digium FAX software screws up, > Digium are no help, and the person is looking for a solution. I get little > visibility when spandsp might do something bad, and the Digium software does > a better job in the same situation. > > A comparison wouldn't be complete without mentioning Hylafax. Hylafax has a > great infrastructure - tools for integrating with Windows clients, and so on. > Neither spandsp or the Digium FAX code can match that for FAX termination. I > think its biggest drawback is you either use it with iaxmodem for audio > FAXing, or t38modem for T.38 FAXing. It can't smoothly integrate the two > right now. > > Steve
Steve thanks for your response. Do I need a copy of spandsp installed or is the res_fax_spandsp.so the complete package. If I need spandsp what version should I be using? The version I compiled and am using is now over a year old spandsp-0.0.5pre4. Where can I get the current stable version with a list of dependencies for compilation? Thanks Bryant -- _____________________________________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
