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 transceiver 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.

Coaxial cable (maximum cable length: 500 m)

Single port transceiver

AUI cable

Termination

Groundresistor terminal

(maximum cable length: 50 m)

Multi-port transceiver

- 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.

Configuration example of a 10BASE5 Ethernet system

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