[sane-devel] Is support for cat5 interfaces of Brother products possible?

Gene Heskett gheskett at shentel.net
Sun May 22 19:07:00 UTC 2016

Greetings all;

This scanner in an MFC-9620DW works well with the brother drivers if one 
is not in a hurry.

I investigated the delays and found the networking portion of the Brother 
Drivers are sending the first 6 packets, at 1 second intervals,  with 
bad TCP checksum according to tcpdump.  The scanner of course rightfully 
ignores them. Then their driver seems to get it all in the same sock for 
the rest of the scan.  I have not traced a multisheet scan as yet, but 
this 7 seconds delay is present regardless of whether the sheet is on 
the glass, or in the in hopper of the ASF.

This has been reported to Brother twice now, but no one has responded 
with a fix.

I would assume this doesn't occur with the usb interface, but to use it, 
I'd need a usb cable about 3 meters long as that socket is also at the 
end of a long molded in ditch in the housing accessable by lifting the 
whole scanner on hinges, but the ditch is a  good 30" of cable to 
negotiate, so its only possible if I add yet another hub, locating it 
close enough, or find an un-hubbed usb cable long enough to reach.

Is this driver possibly a WIP?

Cheers, Gene Heskett
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>

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