RJ-11 is the standard connector utilized on 2-pair (4-wire) telephone wiring. RJ stands for "Registered Jack"- a physical connector interface most often used for telephone wire terminals.
Though the RJ-11 connector has a total of 6 connector positions, typically either only 2 or 4 are actually utilized. RJ-11 connector wiring comes in two standard varieties- untwisted (flat-satin cable) and Unshielded Twisted Pair (UTP).
RJ11 is the most familiar of the registered...
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UTP stands for Unshielded Twisted Pair. It is a regular copper wire that joins many home and many business computers to the telephone company. UTP is the most common form of twisted pair wiring, because it is less expensive and easier to work with than STP (Shielded Twisted Pair). It is used in Ethernet 10Base-T and 100Base-T networks, as well as in home and office telephone wiring.
Two insulated copper wires are twisted around each other to decrease crosstalk or electromagnetic...
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Cat 6, short for Category 6, is a cable standard used mainly for Ethernet computer networking, security systems, and telephone services. Cat 6 cable is backward compatible with the Cat 5, Cat 5E, and Cat 3 cable standards. Category 6 cable is capable of transmitting voice and data up to 155 Mbps (mega bits per second), with a possible transmission frequencies up to 550 MHz.
Cat 6 is used to carry Ethernet 10Base-T, 100Base-TX, and 1000Base-T (Gigabit Ethernet) connections. Cat 6 cable...
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An Ethernet crossover cable can be used to directly connect two network devices through Ethernet. These can either be single computers, or they can be networks. Ethernet crossover cables are commonly used for temporarily networking two devices in the absence of a network router, switch or hub. The principle is the same, but the connection speeds and methods are different. The function of the crossover cable is to send and receive the data. Ethernet crossover cables enable complex data...
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A network card is an expansion card which installs into a computer and enables that computer to physically connect to a local area network.
The most common form of network card in current use is the Ethernet card. Other types of network cards include wireless network cards and Token Ring network cards.
Ethernet network cards most often use RJ-45 jacks. Wireless network cards usually have no external connections other than a possible antenna jack.
Other terms for network card include...
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The SC connector is a fiber optic connector with a push-pull latching mechanism which provides quick insertion and removal while also ensuring a positive connection. SC is an abbreviation for Subscriber Connector.
The SC connector is also available in a duplex configuration. SC connector has a benefit in keyed duplex capability to support send/receive channels. These connectors are commonly used for most modern network applications. The SC is a snap-in connector that is extensively used...
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The LC connector is a small form-factor fiber optic connector. The LC connector resembles a small SC connector. Lucent Technologies first developed the LC connector for use in TelCo environments; hence, LC stands for Lucent Connectors.
The LC connector has been standardized as FOCIS 10 (Fiber Optic Connector Intermateability Standards) in EIA/TIA-604-10. The LC connector makes use of a 1.25 mm ferrule, half the dimension of the ST ferrule, or else, it’s a regular ceramic ferrule...
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RG-58 is a coaxial cable that is used for wiring purposes. A coaxial cable, in general, consists of an inner conductor that is surrounded by a spacer. The coaxial cable is electrically charged and sometimes consists of different uninsulated conductors that remain entangled with one another. The insulating spacer of the cable is further surrounded by a sheath that is cylindrical in shape. The final circle is formed by an insulating jacket. The insulation surrounding the RG-58 cable carries a...
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The plenum is hidden space within a building which is used for HVAC (Heating, Ventilation, and Air Conditioning) and to run cables. Plenum space is normally above a suspended ceiling or under a raised floor. Buildings without plenum spaces will have cabling and HVAC ducts within plain view. The plenum space is normally used to accommodate the communication wires for the building's computer and telephone network. Recent studies have shown that wiring and cabling within the plenum space...
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The ST (Straight Tip) connector is a fiber optic connector which uses a plug and socket which is locked in place with a half-twist bayonet lock. The ST connector was the first defactor standard for fiber optic cabling. It was first developed by AT&T. ST connectors were leading connectors in the late 80s and early 90s.
They are amongst the most frequently used fiber optic connectors in networking applications. They are cylindrically shaped with twist lock coupling, 2.5mm keyed...
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