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