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Chapter 15: Appendix
[2] 10BASE5 Specifications
10BASE5 is a connection method for creating an Ethernet network using a coaxial cable approximately
10 mm thick (The thick cable is also called the "yellow cable"). The "10" in "10BASE5" refers to a data
transfer speed of 10Mbps. The word "BASE" means that the data transfer system is a "base band
system." Finally, the "5" means that the data transfer distance of a trunk is limited to 500 m. In order to
connect devices such as a personal computer, a transceiver is connected by coaxial cable. The trans-
ceiver is connected to devices using a transceiver cable (AUI cable). Since the 10BASE5 cable is thick
and it is not very easy to lay the cables, this system is rarely used for office networks. However, since it
can transfer data over long distances, this system is well suited for trunk networks.
The figure below shows a configuration example of a 10BASE5 Ethernet system.
15
(maximum cable length: 500 m)
Single port transceiver
AUI cable
(maximum cable length: 50 m)
Configuration example of a 10BASE5 Ethernet system
Coaxial cable
Ground
terminal
- The maximum total cable
length of an AUI cable, from
the coaxial cable end to a
terminal device using a multi-
port transceiver, is 50 m.
- Multi-port transceivers can be
cascaded up to two layers
deep.
15-2
Termination
resistor
Multi-port transceiver
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