Option B - Rts; Option C - Xon/Xoff - QMS SmartWriter 80+ User Manual

P.7 Option B - RTS
This Option tells the printer whether or no to use RTS
(Request to Send) data flow control. Set this Options
according to the same setting on your computer.
Do Not Use RTSt Use RTS
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P.S Option C - XONIXOFF
This Option tells the printer whether or not to use XON/XOFF
data flow control. Set this Option according to the same
setting on your computer.
Do Not Use XONIXOFF Use
XON/XOFFt
3-58 Printer Setup