Steve Underwood wrote: > Hi Lee, > > Lee Howard wrote: >> Hi Steve, >> >> Steve Underwood wrote: >>> In chan_dahdi.c there is now code that extends the buffering inside >>> dadhi when a FAX is detected, and puts the buffering back to normal >>> at the end. This isn't really a cure - its more of a bandaid. >>> However, I expect it has the desired effect if they have put it into >>> the trunk code. >>> >>> You need to enable this feature in chan_dahdi.conf. >>> >> >>> Very interestingly, many people who have problems sending from >>> app_txfax or app_fax have no problem sending from iaxmodem + >>> HylaFAX. It seems Asterisk can feed a zaptel/dahdi channel much more >>> reliably when passing a signal through, than when generating on in >>> an app. >> >> So are the chan_dahdi.c developments mentioned of any practical value >> to iaxmodem users? > That's a good question, and I have no idea about the answer. Some > people who have had problems sending from app_txfax say iaxmodem + > HylaFAX works OK on the same machine. This seems strange, as you might > expect a problem in scheduling I/O would affect passthrough as well as > applications. What I don't know is whether they just have a lot less > trouble with iaxmodem, or they have no trouble at all. > > Do you get reports from people who say receive is stable, but transmit > is not?
There have been a few reports of that situation, but all of them that I recall had to do with people who were trying to use VoIP for fax (HylaFAX and iaxmodem tend to be much more tolerant of the audio cut-outs caused by jitter than are other receivers). Otherwise, no, I don't have any of those situations that I can point out. I suppose that I'd need to make some recordings to say for certain whether audio cut-outs were occurring. However, what would really be nice would be to see some comments come from whatever developer at Digium made those chan_dahdi.c modifications. Thanks, Lee. _______________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users