Hello, I had received a lot of unreadable pages with rxfax. I've been doing some search on net and found this: http://threebit.net/mail-archive/asterisk-users/msg15708.html It looks like rxfax/spandsp doesn't support ecm error correction. Bad news for me. Is it still the case? app_rxfax.c dated as 8th of february so I think the answer is yes but I am still hoping a little no or might someone have a patch for enabling/implementing ecm. bye, Zsolt
Artifex Maximus wrote:> Hello, > > I had received a lot of unreadable pages with rxfax. I've been doing > some search on net and found this: > http://threebit.net/mail-archive/asterisk-users/msg15708.html > > It looks like rxfax/spandsp doesn't support ecm error correction. BadThis is correct. You'll also note in that message that you'll want to install iaxmode/HylaFAX. Very low impact on the server and works wonders. Doug -- Ben Franklin quote: "Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety."
spandsp supports 9600 rx and does not support ecm. If you want ecm, use iaxmodem with hylafax - http://iaxmodem.sourceforge.net , currently hylafax in conjunction with iaxmodem seems to be more reliable than rxfax and spandsp by themselves. Craig ----- Original Message ----- From: "Artifex Maximus" <artifexor@gmail.com> To: <asterisk-users@lists.digium.com> Sent: Wednesday, September 13, 2006 6:31 PM Subject: [asterisk-users] rxfax, spandsp and lack of ecm> Hello, > > I had received a lot of unreadable pages with rxfax. I've been doing > some search on net and found this: > http://threebit.net/mail-archive/asterisk-users/msg15708.html > > It looks like rxfax/spandsp doesn't support ecm error correction. Bad > news for me. Is it still the case? app_rxfax.c dated as 8th of > february so I think the answer is yes but I am still hoping a little > no or might someone have a patch for enabling/implementing ecm. > > bye, > Zsolt > _______________________________________________ > --Bandwidth and Colocation provided by Easynews.com -- > > asterisk-users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users >
Artifex Maximus wrote:> Hello, > > I had received a lot of unreadable pages with rxfax. I've been doing > some search on net and found this: > http://threebit.net/mail-archive/asterisk-users/msg15708.html > > It looks like rxfax/spandsp doesn't support ecm error correction. Bad > news for me. Is it still the case? app_rxfax.c dated as 8th of > february so I think the answer is yes but I am still hoping a little > no or might someone have a patch for enabling/implementing ecm.If you look in http://www.soft-switch.org/download/snapshots/snapdsp, the latest snapshot of spandsp and the app_rxfax and app_txfax applications there provide ECM. It is less well tested than the spandsp-0.0.2 code, but seems to be working pretty well now. Steve
On 9/13/06, Steve Underwood <steveu@coppice.org> wrote:> Artifex Maximus wrote: > > If you look in http://www.soft-switch.org/download/snapshots/snapdsp, > the latest snapshot of spandsp and the app_rxfax and app_txfax > applications there provide ECM. It is less well tested than the > spandsp-0.0.2 code, but seems to be working pretty well now. >Fantastic. This looks pretty good I have to say - The ECM seems as if it may be a little intolerant... On a fax machine where I got 100% success in the past with 0.0.2, I am now getting "result (60) Disconnected after permitted retries." on about every 4th page. Is the ECM tolerance level tuneable in spandsp, or is this hard-defined in the standard? Is it just a matter of changing: #define MAX_MESSAGE_TRIES 3 I also noticed that the page title in the TIFF does not appear to be set for the last page received any more (I have not looked into this at-all though, so it may be my environment). Thanks again. Steve