twisted pair


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Related to twisted pair: Shielded twisted pair

twisted pair

[′twis·təd ′per]
(electricity)
A cable composed of two small insulated conductors twisted together without a common covering. Also known as copper pair.

twisted pair

twisted pair
Two insulated electrical conductors, twisted together without a common covering.

twisted pair

(hardware)
A type of cable in which pairs of conductors are twisted together to randomise possible cross-talk from nearby wiring. Inadequate twisting is detectable using modern cable testing instruments.

twisted pair

A thin-diameter wire (22 to 26 gauge) commonly used for telephone and network cabling. The wires are twisted around each other to minimize interference from other twisted pairs in the cable. Alexander Graham Bell invented this and was awarded a patent in 1881. Twisted pairs support less bandwidth than coaxial cable or optical fiber.

Unshielded (UTP) and Shielded (STP)
Twisted pair cables are available unshielded (UTP) or shielded (STP), with UTP being the most common. Shielded twisted pair (STP) is used in noisy environments and protects against electromagnetic interference.

Stranded and Solid
Both UTP and STP come in stranded and solid wire varieties. Stranded is the most common and also very flexible for bending around corners. Solid wire has less attenuation and spans longer distances but is less flexible.


Shielded and Unshielded Twisted Pairs
ScTP (screened twisted pair), also called "foil twisted pair" (FTP), uses one overall shield for more protection than UTP but not as much as STP, which has shields around each wire pair. For an actual example of STP vs. UTP, see cable categories.




   Cable      Band-      Data#  Type       Width      Rate

 1  UTP       Analog voice
 2  UTP                 1 Mbps

 3  UTP/STP   16 MHz,   4 Mbps
 4  UTP/STP   20 MHz,  16 Mbps
 5  UTP/STP  100 MHz, 100 Mbps
 5e UTP/STP  100 MHz,   1 Gbps
 6  UTP/STP  200 MHz,  10 Gbps (<10 m)
 6a UTP/STP  500 MHz,  10 Gbps (>10 m)

 7  STP      600 MHz   10 Gbps
 7a STP     1000 MHz   40 Gbps (<15 m)



The Real Twisted Pair
References in periodicals archive ?
The BCM54880 includes eight SGMII serial media access controller interfaces and eight copper ports, whereby each copper port supports one, two or four twisted pair line connections.
These shielded twisted pair (STP) cable assemblies are manufactured to meet or exceed requirements of TIA/EIA 568-A-4 and product tested to 350 MHz to guarantee enhanced ACR, NEXT, and PS-NEXT performance.
The twisted pair - both serving seven years - are regularly seen sharing quiet chats in Belmarsh Prison, South London.
He explains and defines business, stock market, and technology terms from disintermediation and triple witching to twisted pair and horizontal portal.
The Broadwire 240 ADSL Splitter from ADC Telecommunications is a high-density splitter platform that splits voice and data frequency bands so users can receive voice and high-speed data services simultaneously over a twisted pair of copper wires.
Next Level Communications (NLC), a company which offers an integrated voice, data and video solution via twisted pair to the home, has unveiled two new DMT G.lite standards-compatible and full-rate ADSL modems.
and thin coaxial has a maximum reach of 607 ft.); twisted pair, which resembles telephone wire and is reliable up to 328 ft.; and fiber optic, which has a limitation of 1.2 miles.
For Una-Dyn, that lone cable is a simple 24-v twisted pair, which carries both the power and communication signals between devices.
Products used for this purpose include unshielded twisted pair, shielded twisted pair, foiled twisted pair, coaxial and fiber optic cables, as well as IDC and patch panel cross connects, and voice and data outlets.
Associations that use minicomputers are likely employing either coaxial cabling (television-type cable) or a "twisted pair" telephone-wire type of cabling.
Christopher Mekus, principal with Mekus*Johnson, explains that this system allows each of Morton International's offices or workstations to be connected, via twisted pair wiring, to the nearest closet, from which appropriate transmissions can be affected.
When one enters the network world, it is easy to get caught in the "jargon jungle." Fiber (single-mode and multimode), Ethernet, UHF, cheapernet, sneakernet, twisted pair (shielded and unshielded), coaxial, wireless, and thin ethernet are just some of the terms likely to be heard.