I am trying since a looot of time to send faxes from asterisk, but I have a lot of problems, actually ONE problem, i cannot find the correct compression of the tiff file
i always receive wrong formatted fax, can you tell me how you solved the problem?
NOT email to fax… but from a file… i need to do that from FILE not from EMAIL.
The faxing is very specific on what tiff format it will accept. I had to convert many tiff files till I got the right one. My idea would be to have an incoming fax and then send it out. See if that works. If it does you know the exact tiff format that you need.
fax*CLI> core show version
Asterisk 1.4.20.1 built by root @ fax.xxx.eu on a i386 running FreeBSD on 2008-07-31 23:02:36 UTC
i updated with pain my asterisk on the operative machine… and…
[root@fax 18:01:33 /usr/local/etc/rc.d]# pkg_info
asterisk-1.4.20.1_1 An Open Source PBX and telephony toolkit
asterisk-addons-1.4.6_2 GPL modules for the Asterisk Open Source PBX
asterisk-agx-1.4.2 AGX Extra Addons for Asterisk
spandsp-devel-0.0.4.p15 A DSP library and software FAX machine
libpri-1.4.1 A C implementation of the Primary Rate ISDN specification
libpri-bristuff-1.2.3 A C implementation of the Primary Rate ISDN specification
tiff-3.8.1 Tools and library routines for working with TIFF images
I sent my first fax that actually worked… and then i tried again and again… and it worked! with 2 3 4 and more pages… no more messed up
the only problem is when i sent a fax to a friend of mine from asterisk to some other service fax to mail… he got a trunkated fax… and the same fax (same tif origin) once 1,5 pages (instead of 4) and second time 2,5 pages… mmmm very strange
actually there is still a problem with the TxFax
[Aug 1 01:38:42] WARNING[74902]: /usr/ports/net/asterisk-agx/work/agx-ast-addons/app_txfax.c:438 txfax_exec: Transmission loop error
just that it closes the connection (at the end of sending) and it hangs more seconds because it starts a loop… I maybe need to recompile the package and check the source… but this doesnt seem to affect the real process!!
I can send faxes fine from received TIFF files, but can’t make generated tiff files that will send - this is the tiffinfo from the rxfax that will send
tiffinfo fax1.tif
TIFF Directory at offset 0xb2ae (45742)
Image Width: 1728 Image Length: 1075
Resolution: 204, 98 pixels/inch
Bits/Sample: 1
Compression Scheme: CCITT Group 3
Photometric Interpretation: min-is-white
FillOrder: lsb-to-msb
Orientation: row 0 top, col 0 lhs
Samples/Pixel: 1
Rows/Strip: (infinite)
Planar Configuration: single image plane
Page Number: 0-1
ImageDescription: 2143242455
Software: spandsp
DateTime: 2008/11/05 15:08:55
HostComputer: debsastpbx
Group 3 Options: 2-d encoding+EOL padding (5 = 0x5)
Fax Data: receiver regenerated (1 = 0x1)
Bad Fax Lines: 1
Consecutive Bad Fax Lines: 1
Fax Receive Time: 28 secs
Fax DCS: 00 45 1E
This is the tiffinfo from the one that wont - generated with command
convert -compress fax -monochrome -units pixelsperinch -resample 204x98 filea.pdf filea4.tif
. Time for some one else to grow them 
with 2 3 4 and more pages… no more messed up