VC-400RT
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Managed VDSL2 CPE Router MANUAL Ver. A5
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Appendix A: Cable Requirements
A.1 Ethernet Cable
A CAT 3~7 UTP (unshielded twisted pair) cable is typically used to connect the Ethernet
device to the router. 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.
Figure A-2 Pin Assignments and Wiring for an RJ-45 Straight-Through Cable
Figure A-3 Pin Assignments and Wiring for an RJ-45 Crossover Cable