QMS Scanner - Manual (Page 46)

7-4
Question: Why some parallel port devices and software’s
keypro do not work with the QMS SC-100?
Answer: The QMS SC-100 do pass-through printing all
right , but the pass-through printing may not
work if you connect the parallel port with
devices other than printer. Therefore, if you
would like to connect some parallel port devices
other than printer, please do not connect them to
the same parallel port that the QMS SC-100
currently uses. It is suggested to use other
parallel ports to connect these devices or
keypro. For instance, you can connect the
QMS SC-100 to LPT1, and connect other
parallel port devices to LPT2. Or you can add a
data switch to avoid the problem.