9
2.5 Wiring Earth Ground
To ensure the system will not be damaged by noise or any electrical shock, we suggest
you to make exact connection with JetNet 5728G with Earth Ground.
On the back panel of JetNet 5728G, there is one earth ground screw. Loosen the earth
ground screw by screw drive; then tighten the screw after earth ground wire is connected.
2.6 Wiring Fast Ethernet Ports
JetNet 5728G includes up to 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
Cross-over 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:
Pin MDI-X
Signals
MDI Signals
1
RD+
TD+
2
RD-
TD-
3
TD+
RD+
6
TD-
RD-
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)
100Base-TX: 2-pair UTP/STP Cat. 5 cable, EIA/TIA-568 100-ohm (100m)
1000Base-TX: 4-pair UTP/STP Cat. 5 cable, EIA/TIA-568 100-ohm (100m)
IEEE 802.3af : 4-pair UTP/STP Cat. 5 cable, EIA/TIA-568 100-ohm (100m)
IEEE 802.3at : 4-pair UTP/STP Cat. 5e / 6 cable, EIA/TIA-568 100-ohm (100m)
