Oki Microline Ml184T+ Handbook page 82

Selection
Print Mode
Circuit Test
Monitor Test
Switches 7, 8:
Selection
DTR Pin #20 (-v)
RTS Pin #4 (-v)
SSD Pin #11 (-v)
SSD Pin #11 (-v)
Switches 9 to 11: Select the transmission speed (baud rate) from the chart
Switch 12:
B -- 8 Appendix B: Interface Cable
Switch 4
ON/OFF
ON
OFF
If you selected printer Ready/ Busy protocol (Switch 4
is ON), you can choose the line on which the printer
sends a busy signal and the polarity of the signal (low
or high). Factory set for a low (-) on pin #11, SSD. You
can have the printer send a busy signal on the following
lines:
Switch 7
ON
ON
OFF
OFF
below. The switches are factory set to select 9600 baud.
If printer pin #6, DSR, is connected to the computer,
leave this switch in the factory ON setting. If the computer
does not use the DSR signal, set this switch to OFF to
prevent static transmission.
Switch 5
ON
OFF
OFF
Switch 8
ON
OFF
ON
OFF