12
Table 7. Flag polarity selection
Note
Either the JNOR or JREV jumper must be connected.
Jumper
Function
J2
JNOR
ON
MARK (do not
accept data) =
Current ON
MARK (do not
accept data) =
Negative EIA level
OFF
MARK (do not
accept data) =
Current OFF
MARK (do not
accept data) =
Positive EIA level
JREV
OFF
ON