Information about 10base5
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10BASE5 vampire tap Medium Attachment Unit (Transceiver)
10BASE5 cable is designed to allow transceivers to be added while existing connections are live. This is achieved using a vampire tap - a device which (with sufficient practice) 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 conductor. This is often built into the transceiver and a more flexible multi-wire cable carries the connection between the transceiver and the node. Transceivers can also be connected by using N connectors at the end of a cable segment.
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 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[2]. 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.
The tranceivers connect to nodes using an interface called Attachment Unit Interface (AUI). This interface uses a 15 pin, two row D-style connector but with clips instead of the more normal screws for cable restraint.
10BASE5 is largely obsolete, though due to its widespread deployment in the early days, some systems may still be in use.
See also
- 10BASE2 (thinnet)
- 10BASE-T
- EAD-socket
- Computer network
References
1. ^ All-in-One Network+ Certification Exam Guide, Mike Meyers, 3rd Ed., McGraw-Hill, 2004, p. 79.
2. ^ IEEE Standard 802.3-1985, IEEE, pp. 121, ISBN 0-471-82749-5
2. ^ IEEE Standard 802.3-1985, IEEE, pp. 121, ISBN 0-471-82749-5
This article was originally based on material from the Free On-line Dictionary of Computing, which is licensed under the GFDL.
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ohm (symbol: Ω) is the SI unit of electrical impedance or, in the direct current case, electrical resistance, named after Georg Ohm.
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Definition
An ohm is the electrical resistance offered by a current-carrying element that produces a voltage drop of one volt when a..... Click the link for more information.
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1 metre =
SI units
1000 mm 0 cm
US customary / Imperial units
0 ft 0 in
The metre or meter[1](symbol: m) is the fundamental unit of length in the International System of Units (SI).SI units
1000 mm 0 cm
US customary / Imperial units
0 ft 0 in
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A transceiver is a device that has both a transmitter and a receiver which are combined and share common circuitry or a single housing. If no circuitry is common between transmit and receive functions, the device is a transmitter-receiver. The term originated in the early 1920s.
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vampire tap (also called a piercing tap) is a device for physically connecting a station (i.e. a PC, a printer, or another device) to a network that uses 10BASE5 cabling. This device clamps onto the cable, forcing a spike through a hole drilled through the outer shielding to
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1 metre =
SI units
1000 mm 0 cm
US customary / Imperial units
0 ft 0 in
The metre or meter[1](symbol: m) is the fundamental unit of length in the International System of Units (SI).SI units
1000 mm 0 cm
US customary / Imperial units
0 ft 0 in
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Institute of Electrical and Electronics Engineers
Type Professional Organization
Founded January 1, 1963
Origins Merger of the American Institute of Electrical Engineers and the Institute of Radio Engineers
Key people Leah H.
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Type Professional Organization
Founded January 1, 1963
Origins Merger of the American Institute of Electrical Engineers and the Institute of Radio Engineers
Key people Leah H.
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GNU Free Documentation License (GNU FDL or simply GFDL) is a copyleft license for free documentation, designed by the Free Software Foundation (FSF) for the GNU project.
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