flexfax: HylaFAX last page problem: REMOTE HANGUP: Invalid response to MPS (code 53)

["Hans Feringa (HFX)" <hfx@shelob.demon.nl>]

HylaFAX (tm) Version 4.0pl2
OS: SuSe 5.2

My configuration of HylaFAX does not seem to ACK the last page of a fax
message. The last page has already been sent, so no more pages are to
be expected. (the resulting .tif file does not seem to be received
correctly either, at least when I try to tiff2ps the file, or fax2ps
I get errors, which I will concentrate on next after solving this 
problem)

I tried to find some details of the facsimile protocol, to try and
understand the log files better, but the references I found have
removed the information since (like www.grayfax.com), or I can 
not find them.

So I have actually 2 questions:
1) Where can I find some details about the facsimile protocol
   (just enough to 'decode' the log files.)
2) How can I solve this problem.


Below is the part from the log file with the error message.


May 30 11:02:28.79: [ 2649]: --> [21:+FDCS:1,3,0,2,1,0,0,1]
May 30 11:02:28.79: [ 2649]: REMOTE wants 9600 bit/s
May 30 11:02:28.80: [ 2649]: REMOTE wants page width 1728 pixels in 215 mm
May 30 11:02:28.80: [ 2649]: REMOTE wants unlimited page length 
May 30 11:02:28.80: [ 2649]: REMOTE wants 7.7 line/mm
May 30 11:02:28.80: [ 2649]: REMOTE wants 2-D MR
May 30 11:02:44.02: [ 2649]: --> [8:+FHNG:53]
May 30 11:02:44.02: [ 2649]: REMOTE HANGUP: Invalid response to MPS (code 53)
May 30 11:02:44.03: [ 2649]: RECV FAX (00000012): recvq/fax00012.tif from
+31 75 6709788, route to <unspecified>, 2 pages in 2:54
May 30 11:02:44.19: [ 2649]: RECV FAX: Invalid response to MPS
May 30 11:02:44.25: [ 2649]: RECV FAX (00000012): session with +31 75
6709788 terminated abnormally: Invalid response to MPS
May 30 11:02:44.25: [ 2649]: RECV FAX: bin/faxrcvd "recvq/fax00012.tif"
"modem" "00000012" "Invalid response to MPS"

Any help or directions will be greatly appreciated.

Thx,


Hans Feringa