Epson 802.11g Reference Manual page 190

High-Speed printing:
Select the High-Speed Printing (RAW) radio button. The
Epson high-speed printing port sends a print job to the target
network printer without spooling all of the print data.
High-Speed printing is faster than the other two printing
methods.
5. Click OK.
If you select the High-Speed Printing (RAW) radio button
and if the printer does not support High-Speed printing, an
error message appears. Follow the message to remedy the
problem.
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