5
2.3 Wiring Fast Ethernet Ports
JetNet 5008G-P includes 6 RJ45 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 RJ45 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)
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)
2.4 Wiring Combo Ports
JetNet 5008G-P includes 3 RJ45 Gigabit Ethernet ports. The speed of the gigabit
Ethernet port supports 10Base-T, 100Base-TX and 1000Base-TX. JetNet 5008G-P also
equips 2 gigabit SFP ports combo with gigabit Ethernet ports (port 7th and 8th). The
speed of the SFP port supports 100Base-FX and 1000Base-SX/LX. The SFP ports
accept standard MINI GBIC SFP transceiver. But, to ensure system reliability, Korenix
recommends using the Korenix certificated Gigabit SFP Transceiver. The certificated SFP
transceiver includes 100Base-FX single/multi mode, 1000Base-SX/LX single/multi mode
ranger from 550m to 80KM.