10BASE5


10BASE5

10BASE5 (also known as thicknet) is the original "full spec" variant of Ethernet cable, using special cable similar to RG-8/U coaxial cable. This is a stiff, convert|0.375|in|sing=on diameter cable with an impedance of 50 ohms (Ω), a solid center conductor, a foam insulating filler, a shielding braid, and an outer jacket. The outer sheath is often yellow-to-orange/brown foam fluorinated ethylene propylene (for fire resistance) so it often is called "yellow cable", "orange hose", or sometimes humorously "frozen yellow garden hose". ["All-in-One Network+ Certification Exam Guide", Mike Meyers, 3rd Ed., McGraw-Hill, 2004, p. 79.] 10BASE5 has been superseded by other cabling and wireless networking media, though due to its original widespread deployment may still be in use in some installations.

Name origination

The name "10BASE5" is derived from several characteristics of the physical medium. The "10" refers to its transmission speed of 10 Mbit/s. The "BASE" is short for baseband signalling as opposed to broadband, and the "5" stands for the maximum segment length of convert|500|m.

Network design

The maximum practical number of nodes that can be connected to a 10BASE5 segment is limited to 100 and transceivers may be installed only at precise 2.5-metre intervals. This distance was chosen to "not" correspond to the wavelength of the signal; this ensures that the reflections from multiple taps are not in phase. [citation | title = IEEE Standard 802.3-1985 | pages = 121 | isbn = 0-471-82749-5 | publisher = IEEE] These suitable points are marked on the cable with black bands. The cable must be one linear run; T-connections are not allowed. A 50-ohm resistive terminator is required at each end of the cable.

Transceivers can be connected to cable segments with N connectors, or via a "vampire tap", which allows new nodes to be added while existing connections are live. A vampire tap clamps onto the cable, forcing a spike to pierce through the outer shielding to contact the inner conductor while other spikes bite into the outer braided shield. Care must be taken to keep the outer shield from touching the spike; installation kits include a "coring tool" to drill through the outer layers and a "braid pick" to clear stray pieces of the outer shield.

The transceivers connect to nodes using a connector called an Attachment Unit Interface (AUI), a 15-pin, two-row D-style connector, but using a sliding clip instead of screws for cable restraint. A multi-wire cable carries the connection between the transceiver and the node.

ee also

* 10BASE2 (thinnet)
* 10BASE-T
* EAD-socket
* Computer network
* Local area network

References


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Look at other dictionaries:

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  • 10Base5 — Pile de protocoles 7 • Application 6 • Présentation 5 • Session 4 • Transport …   Wikipédia en Français

  • 10BASE5 — Transceiver 10BASE5, auch Thick Ethernet, Yellow Cable, Thicknet oder Thickwire genannt, ist eines der ersten Ethernet Netzwerke. Für 10BASE5 wird ein 10 mm dickes Koaxialkabel (RG 8) mit einem Wellenwiderstand von 50 Ohm verwendet. Zum… …   Deutsch Wikipedia

  • 10BASE5 — Приёмопередатчик 10BASE 5, «вампирчик» 10BASE 5 (также известен как толстый Ethernet) оригинальный (первый) «полный вариант» спецификации кабельной системы Ethernet, использовал специальный коаксиальный кабель типа RG 8X. Это жёсткий кабель,… …   Википедия

  • 10BASE5 — Pile de protocoles 7.  Application 6.  Présentation 5.  Session 4.  Tr …   Wikipédia en Français

  • 10Base5 — Un tranceptor para 10BASE5. También conocida como Thick Ethernet (Ethernet grueso), es la Ethernet original. Fue desarrollada originalmente a finales de los años 1970 pero no se estandarizó oficialmente hasta 1983. Utiliza una topología en bus,… …   Wikipedia Español

  • 10Base5 —    An implementation of the 802.3 Ethernet standard on thick Ethernet coaxial cable; sometimes called thicknet. The 10Base5 specification has a data transfer rate of 10Mbps and a maximum cablesegment length of 500 meters (1650 feet), over a bus… …   Dictionary of networking

  • 10Base5 — noun IEEE 802.3 Ethernet standard using a type of cable called Thick Ethernet or RG 8 which is thick and yellow and has markings at every 2.5 meters, which designation means the following: (1) the cable transmission speed is 10 Mbps, (2) the… …   Wiktionary

  • 10Base5 — En redes de computación identifica redes del tipo Bus, con tecnología Ethernet. También referenciado como thicknet, por el uso de cable coaxial del tipo RG 8. Soporta una velocidad de 10 Mbps, BASE es contracción de señalización en BandaBase. 5… …   Enciclopedia Universal

  • 10base5 — ● np. ►CABLE Voir 10base2 (ici, le câble, du coaxial épais, peut faire jusqu à 500 mètres de long). Débit: 10 Mbps …   Dictionnaire d'informatique francophone


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