Oki Pos 407II - Manual (Page 49)

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The following is the procedure for changing the settings on DIP switch No. .
. Turn off the printer and all components connected to it.
. Remove the  screws.
. Remove the serial interface board unit.
. Change the setting of the DIP switches.
. Replace the serial interface board unit.
Then secure it with the screws.
6. Turn on the printer and all components connected to it.
The factory settings of DIP switch are all on, except for switches  and .
DIP-SW 
Switch Function ON OFF
-
Baud Rate See table below
-
- Data Length  bits  bits
- Parity Check Disabled Enabled
- Parity Odd Even
-6 Handshake DTR/DSR XON/XOFF
- Should not be changed (Should be set to
off)
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-
Baud Rate Switch - Switch -
00BPS OFF ON
600BPS ON ON
00BPS ON OFF
00BPS OFF OFF
DIP switch 3
No. 1 2 3 4 5 6 7 8
ON
OFF
DIP-SW 3