Epson Expression 1680 Reference Manual page 112

Note:
If you use IP addresses from these ranges, you will not be able to
connect this LAN to the Internet in the future, otherwise there will
be IP address conflicts.
10.0.0.0 - 10.255.255.255
172.16.0.0 - 172.31.255.255
192.168.0.0 - 192.168.255.255
If you plan to use a scanner server PC in a network connected
to the Internet, you should acquire a formal IP address for the
scanner server PC from the Internet organization of your
country.
Make sure one of the naming services such as DNS, WINS, or
LMHOSTS is used in your network. Otherwise use an IP
address to specify the EPSON TWAIN Pro setup dialog box.
The Auto Document Feeder or Transparency Unit cannot be
selected.
Make sure the optional equipment is installed correctly. For
installation instructions, see "Using the Automatic Document
Feeder" on page 4-18 or "Using the Transparency Unit" on page
4-1.
You cannot scan from the Automatic Document Feeder.
Make sure Auto Document Feeder is selected as the
Document Source in EPSON TWAIN Pro.
If the Automatic Document Feeder is open, close it and try
again. If the Automatic Document Feeder is opened while
scanning, remove any jammed paper, and reload any
document which has not yet been scanned, then restart
EPSON TWAIN Pro.
Take the jammed paper out and reload the document, then
restart EPSON TWAIN Pro.
Maintenance and Troubleshooting
5-11