HylaFAX The world's most advanced open source fax server
[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index] [Thread Index]

Re: [hylafax-users] Destination user reports receiving incomplete faxes

There are 4.4.4 packages available for most OSes these days, but there's nothing wrong with a sysadmin who fears change ;-)

To disable ECM, try adding '-E' to your sendfax commandline. Here's the relevant excerpt from the sendfax UNIX manual page:

       -E          Disable use of the Error Correction Mode (ECM) when  trans-
                   mitting page data. Setting ECM to false will limit the max-
                   imum speed to 14400 bps.  By default HylaFAX  will  attempt
                   to  use  ECM  when both the trasmitting modem and receiving
                   device support it.  Note that international calls are some-
                   times  faster  when ECM is disabled.  Beware also that some
                   modems and/or facsimile devices do not  properly  implement
                   ECM causing transmission failures.

-Darren


On Aug 12, 2008, at 2:19 PM, Stott Hare wrote:

Thanks Darren.  I’ll see if I can nudge the systems admin to upgrade our Hylafax server to 4.4.4.  I know last time I mentioned it he grumbled about having to do a special build or some such.
 
How would I configure Hylafax to disable Error Correction for a specific destination fax only?  This isn’t something I’m familiar with, and initial web searches didn’t reveal the answer.
 
Thanks again!
-Stott
 
From: Darren Nickerson [mailto:darren.nickerson@xxxxxxxx] 
Sent: Tuesday, August 12, 2008 1:38 PM
To: Stott Hare
Cc: HylaFAX Users Mailing List
Subject: Re: [hylafax-users] Destination user reports receiving incomplete faxes
 
Stott,
 
Your logs do indicate that  ECM is coming into play here to retransmit frame number 13, so you do have a little signal degradation going on, but this is not uncommon and should in itself be causing a problem. It's possible with such an old version of HylaFAX that you're hitting a bug that's fixed in the current 4.4.4 release, so I recommend upgrading if that's an option for you. If the problem persists in 4.4.4 there's a lot more elaborate test procedure you could do to help pin this down.
 
If the problem is on their side, you might be able to work around it by disabling ECM when sending to this destination.
 
-Darren
 
On Aug 12, 2008, at 1:29 PM, Stott Hare wrote:


Hello folks,
 
I’m hoping someone can point me in the right direction in my search for a solution.  I have a particular fax destination that indicates the faxes they are receiving (which were sent from our Hylafax server) are incomplete or cut off mid page.  I’m not receiving errors indicating there was a failure, but the logs indicate we’ve been getting partial page signals.  Is this indicative of a noisy line, a bad modem configuration or a problematic destination fax machine?  Any good methods for narrowing this down and resolving?
 
Thanks in advance!
-Stott
 
From xferfaxlog:
08/11/08 21:46       SEND   000025660     ttyS4  25995  ""     faxadmin@xxxxxxxxxxxx       "207784****"       "207784****"  2220072       1      0:41   0:25   ""     ""     ""     ""     "faxuser"     "00 44 1F 22"
 
From the specific jobs log file:
Aug 11 21:46:10.57: [ 8233]: SESSION BEGIN 000025660 1207207784****
Aug 11 21:46:10.57: [ 8233]: HylaFAX (tm) Version 4.2.5
Aug 11 21:46:10.57: [ 8233]: SEND FAX: JOB 25995 DEST 207784**** COMMID 000025660 DEVICE '/dev/ttyS4' FROM 'BlueTarp Financial, Inc. <faxadmin@xxxxxxxxxxxx>' USER faxuser
Aug 11 21:46:10.57: [ 8233]: <-- [12:AT+FCLASS=1\r]
Aug 11 21:46:10.60: [ 8233]: --> [2:OK]
Aug 11 21:46:10.60: [ 8233]: DIAL 207784****
Aug 11 21:46:10.60: [ 8233]: <-- [16:ATDT1207784****\r]
Aug 11 21:46:26.49: [ 8233]: --> [7:CONNECT]
Aug 11 21:46:27.95: [ 8233]: --> [2:OK]
Aug 11 21:46:27.95: [ 8233]: REMOTE NSF "00 00 56 55 55 00 8C 90 80 EF 00"
Aug 11 21:46:27.95: [ 8233]: NSF remote fax equipment: Brother MFC-3100C/MFC-8600
Aug 11 21:46:27.95: [ 8233]: <-- [9:AT+FRH=3\r]
Aug 11 21:46:27.98: [ 8233]: --> [7:CONNECT]
Aug 11 21:46:28.66: [ 8233]: --> [2:OK]
Aug 11 21:46:28.66: [ 8233]: REMOTE CSI "207784****"
Aug 11 21:46:28.66: [ 8233]: <-- [9:AT+FRH=3\r]
Aug 11 21:46:28.69: [ 8233]: --> [7:CONNECT]
Aug 11 21:46:28.98: [ 8233]: --> [2:OK]
Aug 11 21:46:28.98: [ 8233]: REMOTE best rate 14400 bit/s
Aug 11 21:46:28.98: [ 8233]: REMOTE max A4 page width (215 mm)
Aug 11 21:46:28.98: [ 8233]: REMOTE max unlimited page length
Aug 11 21:46:28.98: [ 8233]: REMOTE best vres 15.4 line/mm
Aug 11 21:46:28.98: [ 8233]: REMOTE format support: MH, MR, MMR
Aug 11 21:46:28.98: [ 8233]: REMOTE supports T.30 Annex A, 256-byte ECM
Aug 11 21:46:28.98: [ 8233]: REMOTE best 10 ms/scanline
Aug 11 21:46:28.98: [ 8233]: USE 14400 bit/s
Aug 11 21:46:28.98: [ 8233]: USE error correction mode
Aug 11 21:46:28.98: [ 8233]: SEND file "docq/doc34110.ps;f0"
Aug 11 21:46:28.98: [ 8233]: USE A4 page width (215 mm)
Aug 11 21:46:28.98: [ 8233]: USE unlimited page length
Aug 11 21:46:28.98: [ 8233]: USE 3.85 line/mm
Aug 11 21:46:28.98: [ 8233]: USE 2-D MMR
Aug 11 21:46:28.98: [ 8233]: USE 0 ms/scanline
Aug 11 21:46:28.98: [ 8233]: SEND training at v.17 14400 bit/s
Aug 11 21:46:28.98: [ 8233]: <-- [9:AT+FRS=7\r]
Aug 11 21:46:29.13: [ 8233]: --> [2:OK]
Aug 11 21:46:29.13: [ 8233]: <-- [9:AT+FTH=3\r]
Aug 11 21:46:30.01: [ 8233]: --> [7:CONNECT]
Aug 11 21:46:30.01: [ 8233]: <-- data [23]
Aug 11 21:46:30.01: [ 8233]: <-- data [2]
Aug 11 21:46:30.04: [ 8233]: --> [7:CONNECT]
Aug 11 21:46:30.04: [ 8233]: <-- data [7]
Aug 11 21:46:30.04: [ 8233]: <-- data [2]
Aug 11 21:46:31.17: [ 8233]: --> [2:OK]
Aug 11 21:46:31.17: [ 8233]: <-- [9:AT+FTS=7\r]
Aug 11 21:46:31.25: [ 8233]: --> [2:OK]
Aug 11 21:46:31.25: [ 8233]: <-- [11:AT+FTM=145\r]
Aug 11 21:46:31.28: [ 8233]: --> [7:CONNECT]
Aug 11 21:46:31.28: [ 8233]: DELAY 400 ms
Aug 11 21:46:31.68: [ 8233]: <-- data [1024]
Aug 11 21:46:31.68: [ 8233]: <-- data [1024]
Aug 11 21:46:31.68: [ 8233]: <-- data [652]
Aug 11 21:46:31.68: [ 8233]: <-- data [2]
Aug 11 21:46:34.41: [ 8233]: --> [2:OK]
Aug 11 21:46:34.41: [ 8233]: <-- [9:AT+FRH=3\r]
Aug 11 21:46:34.70: [ 8233]: --> [7:CONNECT]
Aug 11 21:46:35.87: [ 8233]: --> [2:OK]
Aug 11 21:46:35.87: [ 8233]: TRAINING succeeded
Aug 11 21:46:35.87: [ 8233]: SEND begin page
Aug 11 21:46:35.88: [ 8233]: SEND EOFB
Aug 11 21:46:35.88: [ 8233]: SEND send frame number 0
Aug 11 21:46:35.88: [ 8233]: SEND send frame number 1
Aug 11 21:46:35.88: [ 8233]: SEND send frame number 2
Aug 11 21:46:35.88: [ 8233]: SEND send frame number 3
Aug 11 21:46:35.88: [ 8233]: SEND send frame number 4
Aug 11 21:46:35.88: [ 8233]: SEND send frame number 5
Aug 11 21:46:35.88: [ 8233]: SEND send frame number 6
Aug 11 21:46:35.88: [ 8233]: SEND send frame number 7
Aug 11 21:46:35.88: [ 8233]: SEND send frame number 8
Aug 11 21:46:35.88: [ 8233]: SEND send frame number 9
Aug 11 21:46:35.88: [ 8233]: SEND send frame number 10
Aug 11 21:46:35.88: [ 8233]: SEND send frame number 11
Aug 11 21:46:35.88: [ 8233]: SEND send frame number 12
Aug 11 21:46:35.88: [ 8233]: SEND send frame number 13
Aug 11 21:46:35.88: [ 8233]: SEND send frame number 14
Aug 11 21:46:35.88: [ 8233]: SEND send frame number 15
Aug 11 21:46:35.88: [ 8233]: SEND send frame number 16
Aug 11 21:46:35.88: [ 8233]: SEND send frame number 17
Aug 11 21:46:35.88: [ 8233]: SEND send frame number 18
Aug 11 21:46:35.88: [ 8233]: SEND send frame number 19
Aug 11 21:46:35.88: [ 8233]: SEND send frame number 20
Aug 11 21:46:35.88: [ 8233]: SEND send frame number 21
Aug 11 21:46:35.88: [ 8233]: SEND send frame number 22
Aug 11 21:46:35.88: [ 8233]: SEND send frame number 23
Aug 11 21:46:35.88: [ 8233]: DELAY 200 ms
Aug 11 21:46:36.08: [ 8233]: <-- [11:AT+FTM=146\r]
Aug 11 21:46:36.11: [ 8233]: --> [7:CONNECT]
Aug 11 21:46:36.11: [ 8233]: DELAY 400 ms
Aug 11 21:46:36.51: [ 8233]: <-- data [1038]
Aug 11 21:46:36.51: [ 8233]: <-- data [1045]
Aug 11 21:46:36.51: [ 8233]: <-- data [1043]
Aug 11 21:46:36.51: [ 8233]: <-- data [1038]
Aug 11 21:46:38.51: [ 8233]: <-- data [1043]
Aug 11 21:46:38.51: [ 8233]: <-- data [1039]
Aug 11 21:46:38.51: [ 8233]: <-- data [667]
Aug 11 21:46:38.51: [ 8233]: <-- data [2]
Aug 11 21:46:40.34: [ 8233]: --> [2:OK]
Aug 11 21:46:40.34: [ 8233]: <-- [9:AT+FTS=9\r]
Aug 11 21:46:40.44: [ 8233]: --> [2:OK]
Aug 11 21:46:40.44: [ 8233]: <-- [9:AT+FTH=3\r]
Aug 11 21:46:41.32: [ 8233]: --> [7:CONNECT]
Aug 11 21:46:41.32: [ 8233]: <-- data [7]
Aug 11 21:46:41.32: [ 8233]: <-- data [2]
Aug 11 21:46:41.78: [ 8233]: --> [2:OK]
Aug 11 21:46:41.78: [ 8233]: SEND send PPS (partial page signal)
Aug 11 21:46:41.78: [ 8233]: SEND send EOP (no more pages or documents)
Aug 11 21:46:41.78: [ 8233]: <-- [9:AT+FRH=3\r]
Aug 11 21:46:41.94: [ 8233]: --> [7:CONNECT]
Aug 11 21:46:44.13: [ 8233]: --> [2:OK]
Aug 11 21:46:44.13: [ 8233]: SEND recv PPR (partial page request)
Aug 11 21:46:44.13: [ 8233]: <-- [9:AT+FRS=7\r]
Aug 11 21:46:44.26: [ 8233]: --> [2:OK]
Aug 11 21:46:44.26: [ 8233]: SEND send frame number 13
Aug 11 21:46:44.26: [ 8233]: SEND send frame number 13
Aug 11 21:46:44.26: [ 8233]: DELAY 200 ms
Aug 11 21:46:44.47: [ 8233]: <-- [11:AT+FTM=146\r]
Aug 11 21:46:44.50: [ 8233]: --> [7:CONNECT]
Aug 11 21:46:44.50: [ 8233]: DELAY 400 ms
Aug 11 21:46:44.90: [ 8233]: <-- data [921]
Aug 11 21:46:44.90: [ 8233]: <-- data [2]
Aug 11 21:46:45.45: [ 8233]: --> [2:OK]
Aug 11 21:46:45.45: [ 8233]: <-- [9:AT+FTS=9\r]
Aug 11 21:46:45.55: [ 8233]: --> [2:OK]
Aug 11 21:46:45.55: [ 8233]: <-- [9:AT+FTH=3\r]
Aug 11 21:46:46.42: [ 8233]: --> [7:CONNECT]
Aug 11 21:46:46.42: [ 8233]: <-- data [7]
Aug 11 21:46:46.42: [ 8233]: <-- data [2]
Aug 11 21:46:46.85: [ 8233]: --> [2:OK]
Aug 11 21:46:46.85: [ 8233]: SEND send PPS (partial page signal)
Aug 11 21:46:46.85: [ 8233]: SEND send EOP (no more pages or documents)
Aug 11 21:46:46.85: [ 8233]: <-- [9:AT+FRH=3\r]
Aug 11 21:46:47.03: [ 8233]: --> [7:CONNECT]
Aug 11 21:46:48.20: [ 8233]: --> [2:OK]
Aug 11 21:46:48.20: [ 8233]: SEND recv MCF (message confirmation)
Aug 11 21:46:48.20: [ 8233]: <-- [9:AT+FRS=7\r]
Aug 11 21:46:48.35: [ 8233]: --> [2:OK]
Aug 11 21:46:48.35: [ 8233]: SEND end page
Aug 11 21:46:48.35: [ 8233]: SEND FAX (000025660): FROM faxadmin@xxxxxxxxxxxx TO 207784**** (page 1 of 1 sent in 0:20)
Aug 11 21:46:48.36: [ 8233]: SEND FAX (000025660): FROM faxadmin@xxxxxxxxxxxx TO 207784**** (docq/doc34110.ps;f0 sent in 0:20)
Aug 11 21:46:49.37: [ 8233]: <-- [9:AT+FTH=3\r]
Aug 11 21:46:50.23: [ 8233]: --> [7:CONNECT]
Aug 11 21:46:50.23: [ 8233]: <-- data [3]
Aug 11 21:46:50.23: [ 8233]: <-- data [2]
Aug 11 21:46:50.55: [ 8233]: --> [2:OK]
Aug 11 21:46:50.55: [ 8233]: <-- [5:ATH0\r]
Aug 11 21:46:51.73: [ 8233]: --> [2:OK]
Aug 11 21:46:51.73: [ 8233]: SESSION END
 

Project hosted by iFAX Solutions