Epson 802.11g Reference Manual page 189

4. Make the appropriate settings for the desired port.
LPR enhanced printing:
Select the LPR Printing radio button, and specify the queue
name (up to 32 characters). LPR enhanced printing sends a
print job to the target network printer without spooling all of
the print data. LPR enhanced printing is faster than LPR
standard printing.
LPR standard printing:
Select the Confirm file size check box, and specify the queue
name (up to 32 characters). Print data is spooled by the
computer before being sent to the target network printer.
Note:
When the print data size exceeds 20 MB, we recommend that you
use LPR enhanced printing
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