flexfax: Getting Transmit Phase B error on 1 number out of 200

["Carl Patten" <cpatte@trimodalinc.com>]

My HylaFAX system is successfully sending 200 faxes a day, but one
destination always fails with the dreaded "Unspecified Transmit Phase B
error".  Going through the archives, it was said that when one encounters
such an error, one should post the error log here for others to see.  So
that's what I'm doing.  Can anyone give me a clue as to what's failing and
how I can fix it?

The fax server is running on SCO Unix OpenServer 5.0.4, HylaFAX v4.0pl2
binary.
Modems are MultiTech MT2834BR (rack-mount) recently upgraded to the latest
firmware revision.  I'm running them Class2, rtscts with the mt-1432 config
script, and using faxgetty.

Thanks!

- Carl Patten
cpatte@trimodalinc.com

Log follows:

Your facsimile job to 1-317-337-0443 failed because:
    Unspecified Transmit Phase B error; too many attempts to send

    ---- Transcript of session follows ----

Nov 01 20:36:37.39: [ 9121]: SESSION BEGIN 00019563 13173370443
Nov 01 20:36:37.40: [ 9121]: SEND FAX: JOB 13127 DEST 1-317-337-0443 COMMID
00019563
Nov 01 20:36:37.40: [ 9121]: DELAY 2600 ms
Nov 01 20:36:40.03: [ 9121]: <-- [15:ATE0V1Q0S0=0H0\r]
Nov 01 20:36:40.26: [ 9121]: --> [14:ATE0V1Q0S0=0H0]
Nov 01 20:36:40.26: [ 9121]: --> [2:OK]
Nov 01 20:36:40.26: [ 9121]: <-- [21:ATS8=2S7=60&E4&D3&C1\r]
Nov 01 20:36:40.44: [ 9121]: --> [2:OK]
Nov 01 20:36:40.44: [ 9121]: <-- [12:AT+FCLASS=2\r]
Nov 01 20:36:40.62: [ 9121]: --> [2:OK]
Nov 01 20:36:40.62: [ 9121]: <-- [10:AT+FTBC=0\r]
Nov 01 20:36:40.80: [ 9121]: --> [2:OK]
Nov 01 20:36:40.80: [ 9121]: <-- [10:AT+FBOR=0\r]
Nov 01 20:36:40.98: [ 9121]: --> [2:OK]
Nov 01 20:36:40.98: [ 9121]: <-- [13:AT+FPHCTO=30\r]
Nov 01 20:36:41.16: [ 9121]: --> [2:OK]
Nov 01 20:36:41.16: [ 9121]: <-- [24:AT+FDCC=1,5,2,2,2,0,0,0\r]
Nov 01 20:36:41.34: [ 9121]: --> [2:OK]
Nov 01 20:36:41.34: [ 9121]: <-- [5:ATM0\r]
Nov 01 20:36:41.52: [ 9121]: --> [2:OK]
Nov 01 20:36:41.52: [ 9121]: <-- [12:AT+FCLASS=2\r]
Nov 01 20:36:41.80: [ 9121]: --> [2:OK]
Nov 01 20:36:41.80: [ 9121]: <-- [10:AT+FTBC=0\r]
Nov 01 20:36:42.08: [ 9121]: --> [2:OK]
Nov 01 20:36:42.08: [ 9121]: <-- [10:AT+FBOR=0\r]
Nov 01 20:36:42.36: [ 9121]: --> [2:OK]
Nov 01 20:36:42.36: [ 9121]: <-- [13:AT+FPHCTO=30\r]
Nov 01 20:36:42.64: [ 9121]: --> [2:OK]
Nov 01 20:36:42.64: [ 9121]: <-- [24:AT+FDCC=1,5,2,2,2,0,0,0\r]
Nov 01 20:36:42.92: [ 9121]: --> [2:OK]
Nov 01 20:36:42.92: [ 9121]: <-- [23:AT+FLID="612 782 9002"\r]
Nov 01 20:36:43.20: [ 9121]: --> [2:OK]
Nov 01 20:36:43.20: [ 9121]: DIAL 13173370443
Nov 01 20:36:43.20: [ 9121]: <-- [17:ATDT13173370443@\r]
Nov 01 20:37:09.06: [ 9121]: --> [5:+FCON]
Nov 01 20:37:49.07: [ 9121]: REMOTE HANGUP: Unspecified Transmit Phase B
error (code 20)
Nov 01 20:37:49.07: [ 9121]: SEND FAILED: Unspecified Transmit Phase B error
Nov 01 20:37:49.07: [ 9121]: SEND FAILED: Unspecified Transmit Phase B
error; too many attempts to send
Nov 01 20:37:49.07: [ 9121]: <-- [5:ATH0\r]
Nov 01 20:37:50.92: [ 9121]: --> [7:+FHNG:2]
Nov 01 20:37:50.92: [ 9121]: REMOTE HANGUP: Call aborted,  from +FK or <CAN>
(code 2)
Nov 01 20:37:52.14: [ 9121]: --> [2:OK]
Nov 01 20:37:52.16: [ 9121]: SESSION END

    ---- Unsent job status ----

   Destination: 1-317-337-0443
         JobID: 13127
       GroupID: 13127
        Sender: faxmi
      Mailaddr: faxmi@trimodalinc.com
        CommID: 00019563
Submitted From: localhost
    Page Width: 215 (mm)
   Page Length: 279 (mm)
    Resolution: 196 (lpi)
        Status: Unspecified Transmit Phase B error; too many attempts to
send
       Dialogs: 3 (exchanges with remote device)
         Dials: 0 (consecutive failed calls to destination)
         Calls: 7 (total phone calls placed)
         Pages: 0 (pages transmitted)
      TotPages: 2 (total pages to transmit)
      Attempts: 0 (attempts to send current page)
        Dirnum: 0 (directory of next page to send)

    ---- Documents submitted for transmission ----

The following documents were submitted for transmission and are
available on the server for reuse until they are automatically
purged when this job is removed.  Documents may also be manually
removed using the faxrm command; consult faxrm(1) for information.

Filename                 Size Type
docq/doc1236.ps         27301 PostScript