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Appendix A. Pinouts
The modem port pin assignments apply to units equipped with an inter-
nal modem (4200290L1, L2, L3, and L4).
A-2
Pin
Name
1
TD+
The positive signal for the TD differential pair.
This signal contains the serial output data
stream transmitted onto the network.
2
TD-
The negative signal for the TD differential pair
(pins 1 and 2).
3
RD+
The positive signal for the RD differential pair.
This signal contains the serial input data
stream received from the network.
4, 5
N/A
Not used.
6
RD-
The negative signal for the RD differential pair
(pins 3 and 6).
7, 8
N/A
Not used.
MX2800 User Manual
Table A-2. LAN Port Pin Assignments
Description
Table A-3. Modem Port Pin Assignments
Pin
1, 2, 3
6, 7, 8
Description
not used
4
Tip
5
Ring
not used
61200290L1-1
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