twisted pair

(redirected from Ethernet cables)

twisted pair

[′twis·təd ′per]
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

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.

   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 ?
This conundrum is also applicable to Ethernet cables and connectors, although tests have shown the commercial variety can meet an untimely end.
GORE[R] Ethernet cables are engineered for the increasing data demands of modern airborne digital networks.
Faster data on the familiar blue Ethernet cables may be on the cards after the formation of a new study group at the IEEE backed by experts from most of the major industry players including Broadcom, Cisco, Intel, Marvel, and HP Networking.
These 600 V TC 1277 rated Cat 5e cord sets, with RJ45 connectors, are the first to address a long-standing challenge-the ability to easily route industrial Ethernet cables in the most demanding heavy-industry environments using existing 600 V cable trays.
Optimized for LAN testing efficiency, the IENet PRO empowers network professionals to instantly verify the integrity of two-pair and four-pair Industrial Ethernet cables, and to assure proper terminations by detecting opens, shorts, miswires, reversals and split pairs in fractions of a second.
Offering double the bandwidth of standard GigE cameras, the Dual GigE's simple interface features two Ethernet cables that improve security and ensure that data is maintained even if one Ethernet cable is disconnected.
To coincide with the initiative, ShowMeCables has discounted a swath of Ethernet cables and other related products, including varying lengths of shielded and unshielded Cat5e/Cat6 patch cables; Cat6 Keystone jacks; bulk boxes of PVC Cat6 cabling; and Ethernet cable splicing tools.
The ethernet cables transmit the computer information that's so vital for accurate firing by the MLRS and HIMARS.
For our example, we will use equipment designed for the "g" standard, a Linksys Wireless Access Point Router, which costs about $70, and two Ethernet cables, costing about $5 each.
The NEMAHub meets NEMA 4X standards for water tightness, with properly installed Cat 5 Ethernet cables, the manufacturer reports.
Among wireless Ethernet's attractions are that it is less expensive to install a few wireless access points than to install Category 5 Ethernet cables or fiber; it accesses areas of the factory floor that were heretofore inaccessible; and it helps mobile users stay connected to the plant network.