Korenix JetNet 3705, User Manual

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Korenix JetNet 3705 Series Industrial PoE Switch User’s Manual 2-6
Wiring the Ethernet Ports
JetNet 3705 and JetNet3705f Series Industrial PoE Switch support 4 RJ-45 ports (JetNet 3705)
with automatic MDI/MDI-X crossover, PoE Injector, and automatic 10/100Mbps data rate sensing
for 10Base-T or 100Base-TX connections. Automatic MDI/MDI-X crossover allows you to
connect to other switches, hubs, or workstations, without regard to using straight-through or
crossover cabling.
The switch also provides one RJ-45 uplink (JetNet3705_ or 100Mbps Fiber uplink port (JetNet
3705f)
Port 1 to port 4 also provides Power over Ethernet function that delivers DC 48V power through
the spare pairs to power the PD.
The DC +48V is delivered through the RJ-45 pin 4 and 5, DC-48V through the RJ-45 pin 7 and 8.
The following figures depict the schematic diagram of straight-through and crossover cabling.
Note that crossover cables simply cross-connect the transmit lines at each end to the receive
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 green 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).