Vigitron Vi3010 Installation And Getting Started Manual page 34

Straight-Through
Wiring
Crossover Wiring
Pin MDI Signal Name
1 Transmit Data plus (TD+)
2 Transmit Data minus (TD-)
3 Receive Data plus (RD+)
6 Receive Data minus (RD-)
4, 5, 7, 8 Not used
Table 11: 10/100BASE-TX MDI and MDI-X Port Pin outs
If the twisted-pair cable is to join two ports and only one of the ports has an internal
crossover (MDI-X), the two pairs of wires must be straight-through (when auto-
negotiation is enabled for any RJ-45 port on this switch, you can use either straight-
through or crossover cable to connect to any device type).
You must connect all four wire pairs as shown in the following diagram to support
Gigabit Ethernet.
EIA/TIA 568B RJ-45 Wiring Standard
10/100BASE-TX Straight-through Cable
Figure 20: Straight-through Wiring
If the twisted-pair cable is to join two ports and either both ports are labeled with
an "X" (MDI-X) or neither port is labeled with an "X" (MDI), a crossover must be
implemented in the wiring (when auto-negotiation is enabled for any RJ-45 port on
this switch, you can use either straight-through or crossover cable to connect to any
device type).
You must connect all four wire pairs as shown in the following diagram to support
Gigabit Ethernet.
NOTE: The "+" and "-" signs represent the polarity of the
wires that make up each wire pair.
MDI-X Signal Name
Receive Data plus (RD+)
Receive Data minus (RD-)
Transmit Data plus (TD+)
Transmit Data minus (TD-)
Not used
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