[Asterisk-Users] SpanDSP + Lexmark 6170 = Cut off faxes?

[Steve Underwood]

Hi Scott,

I have looked at many similar reports, and all but one turned out to be 
due to data slips. However, if you are sure this is only happening with 
one particular FAX machine your problem might be different. In t30.c 
uncomment the first line. Rebuild spandsp and try FAXing. You should get 
audio log files in /tmp. Send them to me, and I will investigate.

Steve

Scott Lykens wrote:

>Hello all.
>
>I'm running SpanDSP 0.0.2pre4 with Asterisk v1.0 (10/23 from CVS) and
>am having trouble with receiving cut off faxes from a Lexmark 6170 on
>the distant end. I'm running this on a Tyan S2420 board that is about
>four years old with a P3-800 and 256 MB on it.
>
>I have tested with a PRI connected to both my Nortel Opt 11C and
>directly to Verizon's (LEC) network. I have the same problem with
>either configuration, which I am hoping rules out timing at least in
>relation to the PRI and PSTN.
>
>I receive between 300 and 400 rows of pixels of each page and then it
>cuts off and goes to the next page. There are a few rows of identical
>data then an abrupt end of the page. Then the next page starts out
>looking great only to suffer the same fate. The proper number of pages
>appears to be received but only ~350 rows of pixels worth.
>
>This Lexmark 6170 is the only machine I have had trouble with so far.
>All others appear to be able to send to me properly and completely.
>
>For what it is worth I am including the tiffinfo on the received fax file.
>
>Any help or pointers would be appreciated.
>
>sl
>
>-- tiffinfo
>
>TIFF Directory at offset 0x153e
>  Image Width: 1728 Image Length: 403
>  Resolution: 77, 38.5 pixels/cm
>  Bits/Sample: 1
>  Compression Scheme: CCITT Group 3
>  Photometric Interpretation: min-is-white
>  FillOrder: lsb-to-msb
>  Date & Time: "2004/11/08 17:27:40"
>  Host Computer: "cs"
>  Image Description: "2125551212          "
>  Orientation: row 0 top, col 0 lhs
>  Samples/Pixel: 1
>  Rows/Strip: (infinite)
>  Planar Configuration: single image plane
>  Page Number: 0-3
>  Software: spandsp
>  Group 3 Options: 2-d encoding+EOL padding (5 = 0x5)
>  Fax Data: receiver regenerated (1 = 0x1)
>  Bad Fax Lines: 10
>  Consecutive Bad Fax Lines: 7
>  Fax Receive Time: 1115882420 secs
>TIFF Directory at offset 0x2b00
>  Image Width: 1728 Image Length: 335
>  Resolution: 77, 38.5 pixels/cm
>  Bits/Sample: 1
>  Compression Scheme: CCITT Group 3
>  Photometric Interpretation: min-is-white
>  FillOrder: lsb-to-msb
>  Date & Time: "2004/11/08 17:27:50"
>  Host Computer: "cs"
>  Image Description: "2125551212          "
>  Orientation: row 0 top, col 0 lhs
>  Samples/Pixel: 1
>  Rows/Strip: (infinite)
>  Planar Configuration: single image plane
>  Page Number: 1-3
>  Software: spandsp
>  Group 3 Options: 2-d encoding+EOL padding (5 = 0x5)
>  Fax Data: receiver regenerated (1 = 0x1)
>  Bad Fax Lines: 18
>  Consecutive Bad Fax Lines: 16
>  Fax Receive Time: 1115882388 secs
>TIFF Directory at offset 0x418c
>  Image Width: 1728 Image Length: 337
>  Resolution: 77, 38.5 pixels/cm
>  Bits/Sample: 1
>  Compression Scheme: CCITT Group 3
>  Photometric Interpretation: min-is-white
>  FillOrder: lsb-to-msb
>  Date & Time: "2004/11/08 17:28:08"
>  Host Computer: "cs"
>  Image Description: "2125551212          "
>  Orientation: row 0 top, col 0 lhs
>  Samples/Pixel: 1
>  Rows/Strip: (infinite)
>  Planar Configuration: single image plane
>  Page Number: 2-3
>  Software: spandsp
>  Group 3 Options: 2-d encoding+EOL padding (5 = 0x5)
>  Fax Data: receiver regenerated (1 = 0x1)
>  Bad Fax Lines: 18
>  Consecutive Bad Fax Lines: 9
>  Fax Receive Time: 1115882388 secs
>_______________________________________________
>Asterisk-Users mailing list
>Asterisk-Users at lists.digium.com
>http://lists.digium.com/mailman/listinfo/asterisk-users
>To UNSUBSCRIBE or update options visit:
>   http://lists.digium.com/mailman/listinfo/asterisk-users
>
>  
>