Hitachi FL.NET, User Manual

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8 APPENDIXES
8-5
8.1.4 Other Ethernet specifications
(1) 10BASE2
10BASE2 is an Ethernet connection method that uses a coaxial cable about 5 mm in thickness
(also referred to as a thin cable). The number “10” of the designation “10BASE-2” represents
a transmission speed of 10 Mbps. The “BASE” portion indicates the use of a baseband
transmission system. The suffix “2” indicates that the trunk transmission distance is 185 m
(
≒
200 m). For the connection to a personal computer or like device, a T-shaped branch
connector is attached to the BNC connector on a device, and coaxial cables are connected to
both ends of the branch connector. Figure 8-4 shows a typical 10BASE2 Ethernet
configuration.
Figure 8-4 10BASE2 Ethernet Configuration Example
(2) Optical Ethernet
Optical Ethernet uses a fiber-optic cable as the transmission medium. It is used in systems
where 500 m or longer distance transmission and increased noise immunity are called for.
Optical Ethernet connection methods defined by the IEEE 802.3 standard are 10BASE-FP,
10BASE-FB, 10BASE-FL, 100BASE-FX, 1000BASE-LX, and 1000BASE-SX. Figure 8-5
shows a typical optical Ethernet configuration.
Fiber-optic cable
(maximum cable length: 2 km)
Optical repeater
Optical transceiver
10BASE5 system
Figure 8-5 Optical Ethernet Configuration Example
Branch connector
Coaxial cable [RG58A/U]
(maximum cable length: 185 m)
Terminating
resistor