PoE SERIES NP-100SE+/PD USER’S MANUAL Ver. A6
13
Appendix A:
Cable Requirements
A CAT 3, 4 or 5 UTP (unshielded twisted pair) cable is typically used to connect the Ethernet device to the modem. A
10Base-T cable often consists of four pairs of wires, two of which are used for transmission. The connector at the end of the
10Base-T cable is referred to as an RJ-45 connector and it consists of eight pins. The Ethernet standard uses pins 1, 2, 3
and 6 for data transmission purposes. (
Table A-1
)
Table A-1
RJ-45 Ethernet Connector Pin Assignments
MDI
MDI-X
PIN #
Signal
Media Dependant
interface
Signal
Media Dependant
interface-cross
1
TX+
Transmit Data +
RX+
Receive Data +
2
TX-
Transmit Data -
RX-
Receive Data -
3
RX+
Receive Data +
TX+
Transmit Data +
4
--
Unused
--
Unused
5
--
Unused
--
Unused
6
RX-
Receive Data -
TX-
Transmit Data -
7
--
Unused
--
Unused
8
--
Unused
--
Unused
Figure A-1 Standard RJ-45 repectacle/connector
Note:
Please make sure your connected cables are with same pin assignment as above table before deploying the cables into your
network.
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