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Appendix
Twisted Pair Cable and Port Specifications
A two-pair twisted pair cable is required for 1000BASE-T, 100BASE-TX and 10BASE-T connections.
Each wire pair is identified by two colors. For example, one may be red and the other red with a
white stripe. In addition, RJ-45 connectors are required at each end of the cable.
Note: A 4-pair 8-wire straight cable is required to use PoE power supply.
It is necessary to connect wire pairs to the RJ-45 connectors in a certain direction.
100BASE-TX / 10BASE-T Port Specifications
In the cables used in 100BASE-TX / 10BASE-T, pins 1 and 2 are used for sending data, and pins 3 and
6 are used for receiving data.
The switch supports AUTO-MDIX on all ports. You can use straight cables in all network connections
with computers, servers, other switches and hubs.
The pin assignments for 100BASE-TX / 10BASE-T MDI ports and MDI-X ports are shown in the
following table.
Pin number
MDIX / MDI signal
Signal function
1
RD+ / TD+
Receive data (+) / Send data (+)
2
RD- / TD-
Receive data (-) / Send data (-)
3
TD+ / RD+
Send data (+) / Receive data (+)
4
Not Used
Not Used
5
Not Used
Not Used
6
TD- / RD-
Send data (-) / Receive data (-)
7
Not Used
Not Used
8
Not Used
Not Used
+ and - refer to the polarity of the wires making up each wire pair.
