Symbol LS 2104 Product Reference Manual page 88

LS 2104 Product Reference Guide
When Option 2 is selected, RTS is always high or low (user-programmed logic level).
However, the scanner waits for CTS to be asserted before transmitting data. If CTS is not
asserted within 2 seconds (default), the scanner issues an error indication and discards the
data.
When Option 3 is selected, the scanner asserts RTS prior to any data
transmission, regardless of the state of CTS. The scanner waits up to 2 seconds
(default) for CTS to be asserted. If CTS is not asserted during this time, the
scanner issues an error indication and discards the data. The scanner deasserts
RTS when transmission is complete.
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RTS/CTS OPTION 2
RTS/CTS OPTION 3