Oki Pos 441 - Manual (Page 44)

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10-1. RS-232C Interface Model
The RS-C interface model is equipped with DIP switches on the serial interface board unit
to change the communication settings. Change the settings for DIP switch No.  according to
the following procedures.
. Turn off the printer and all components connected to it.
. Remove the  screws.
. Remove the serial interface board unit.
4. Change the setting of the DIP switches.
5. 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
-4 Parity Check Disabled Enabled
-5 Parity Odd Even
-6 Handshake DTR/DSR XON/XOFF
- Pin #6 (DSR) reset signal Valid Invalid
- Pin #5 (INIT) reset signal Valid Invalid
Baud Rate Settings Table
Baud Rate Switch 2-1 Switch 2-2
400BPS OFF ON
600BPS ON ON
00BPS ON OFF
400BPS OFF OFF
No. 1
DIP-SW2
2 3 4 5 6 7 8
ON
OFF
DIP switch 2