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4.3 Wiring Fast Ethernet Ports
JetNet 5428G includes 24 RJ-45 Fast Ethernet ports. The fast Ethernet ports support
10Base-T and 100Base-TX, full or half duplex modes. All the fast Ethernet ports will auto-
detect the signal from connected devices to negotiate the link speed and duplex mode.
Auto MDI/MDIX allows users to connect another switch, hub or workstation without
changing straight through or crossover cables.
Note that crossover cables simply cross-connect the transmit lines at each end to the
received lines at the opposite end.
Straight-through Cabling Schematic
Note that Ethernet cables use pins 1, 2,
3, and 6 of an 8-pin RJ-45 connector. The
signals of these pins are converted by the
automatic MDI-X function, as shown in the
table below:
Connect one side of an Ethernet cable into any switch port and connect the other side to
your attached device. The LNK LED will light up when the cable is correctly connected.
Refer to the LED Indicators section for descriptions of each LED indicator. Always make
sure that the cables between the switches and attached devices (e.g. switch, hub, or
workstation) are less than 100 meters (328 feet).
The wiring cable types are as below.
10Base-T: 2-pair UTP/STP Cat. 3, 4, 5 cable, EIA/TIA-568 100-ohm (100m)
100 Base-TX: 2-pair UTP/STP Cat. 5 cable, EIA/TIA-568 100-ohm (100m)
1000 Base-TX: 4-pair UTP/STP Cat. 5 cable, EIA/TIA-568 100-ohm (100m)
Cross-over Cabling Schematic
Pin MDI-X
Signals
MDI Signals
1
RD+
TD+
2
RD-
TD-
3
TD+
RD+
6
TD-
RD-
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