Korenix JetNet 4000, Руководство пользователя

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Hardware Installation
Korenix JetNet Series Industrial Web-Managed Ethernet Rail Switch User’s Manual 2-5
1. Insert the alarm device’s negative wire into assigned position of the terminal block connector.
2. Tighten the wire-clamp screws to prevent the wires from being loosened.
Wiring the Ethernet Ports
RJ-45 ports with auto MDI-MDI-X function: JetNet 4008 has eight 10/100 Mbps auto-sensing
ports for 10Base-T or 100Base-TX device connection. The UTP ports will auto-detect 10Base-T
and 100Base-TX connections. Auto MDI/MDI-X function allows users to connect another switch
or workstation without changing straight-through or cross-over cabling. See the figures below for
the schematic diagram of straight-through and cross-over cabling.
Straight-through Cabling Schematic Cross-over Cabling Schematic
Use four twisted-pair Category 5 cables for RJ-45 port connection. Connect one side of an
Ethernet cable into the JetNet’s TX port, while the other side is connected to the attached device.
The LED will light up when the cable is correctly connected. Refer to the
LED Indicators section
for descriptions of the function of each LED indicators. The cables between the JetNet and the
attached device (e.g. switch, hub, or workstation) must be less than 100 meters (328 ft.).
All ports of JetNet 4000 support auto-MDI/MDI-X function. When you use an Ethernet cable to
connect other devices, such as computers, switches or hubs, pin 1, 2, 3, and 6 of the 8-pin RJ45
connector are used to communicate with the connected devices. Pin1, 2, 3, and 6’s signals are
converted by the 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-
Two switches are now up-linked together. If we change the up-link port manually at this time,
MAC address table will change as well. After MAC address table makes the changes, and then
the data can be transmitted between these two switches. This period of time is called MAC
address table aging time. Korenix JetNet 4000’s default aging time is 5 minutes, which means
that if you manually change the up-link port, you will need to wait for 5 minutes before the data