# tried to get Brother ADS2700W working in Debian 10 Buster.

# could not find the instructions, so after much frustration, wrote down what worked:

# Using brscan4 resulted in lots of errors.  You have to use brscan5

# inability to scan a full page above 100 resolution

# changing mode resulted in this error:
# "scanimage: sane read: Error during device I/O"
# and paper would "jam"

# install sane
apt-get install sane sane-utils xsane

# obtain brscan5 rpm (brscan5-1.2.3-0.x86_64.rpm)
# https://download.brother.com/welcome/dlf105159/brscan5-1.2.3-0.i386.rpm

# use alien to convert to .deb
sudo apt-get install alien
sudo alien brscan5-1.2.3-0.x86_64.rpm

# install.deb
sudo dpkg -i brscan5-1.2.3-1.x86_64.deb

# download the brscanads2200ads2700w-0.1.15-1.i686.deb deb package and install
sudo dpkg -i brscanads2200ads2700w-0.1.15-1.i686.deb

# install brscan-key
sudo dpkg -i brscan-skey-0.3.1-1.amd64.deb

# configure brsaneconfig5 properly

# CONFIGURE YOUR ADS-2700W TO HAVE A NETWORK ADDRESS (here it's 10.0.0.12):

# then run this command
sudo /opt/brother/scanner/brscan5/brsaneconfig5 -a name=ADS2700W model=ADS2700W ip=10.0.0.12

# then run conf_ip
sudo conf_ip 10.0.0.12

# verify scanner is there with:
scanimage -L

# to scan
scanimage -d 'BrotherADS2700:net10.0.0.12' --source 'Automatic Document Feeder(left aligned,Duplex)' --batch="%d.pnm" --res=600 --mode 'Gray' -x 215 -y 297 -vvv