10BASE5

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"Vampire" with transceiver 10BASE5 (also known as Thicknet or thick coax) - one of the 1980 standard Ethernet cables using a thick (9.5 mm) coaxial cable with a 50 ohm impedance. It allowed the construction of segments up to 500 m in length. It worked at a speed of 10 Mbps. A "vampire" with a transceiver (vampire tap) was plugged into the bus cable.

10BASE5 technology is important because it was the first medium used by Ethernet. This technology was part of the original IEEE 802.3 standard. The main advantage of the 10BASE5 technology was its reach. It is no longer used, but sometimes it is possible to find still working installations. Today, it is very difficult to find basic components on the market such as network cards.

Systems built with 10BASE5 technology are inexpensive and do not require configuration, but the technology itself is not immune to the signal reflections in the cable. These systems use Manchester coding. The cable has a uniform central guide. Each of up to five coaxial coaxial segments can be up to 500 meters in length. The wiring is large, heavy, with a relatively large bending radius, difficult to install. However, the relatively large segment length allowed an advantage, which prolonged the use of this technology in certain applications.

Since the medium is a single coaxial cable, only one station can transmit packets at a time, otherwise there will be a collision. For this reason, 10BASE5 networks only work in half-duplex mode, resulting in a maximum data transfer rate of 10 Mbps.

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