Epson C82305 Series User Manual page 15

Table 7. Flag polarity selection
Jumper
JNOR
J5
JREV
Note
Either the JNOR or JREV jumper must be connected.
Function
ON: MARK (do not accept data) =
Current ON
ON: MARK (do not accept data)=
Negative EIA level
MARK (do not accept data) =
ON:
Current OFF
MARK (do not accept data)=
ON:
Positive EIA level
12
Factory
setting
O N
O F F