UTP cable

The chart below shows the cost for different categories of UTP cabling. If Athena s office needs to buy 100 feet of UTP cable that can send data at a speed of 75 megabytes per second, about how much will she spend ... 

B. Category 3 UTP cable contains four twisted pairs of wires and has three twists per foot. It is only capable of transmitting data at 10Mbps. See Chapter 8 for more information. 

Unshielded twisted pair (UTP) cable offers many advantages over the thick-wire and thin coax media. Because thickwire and thin coax are coaxial cables, they are relatively expensive and require some care during installation. UTP is similar to, if not the same as, the telephone cable that may already be installed and available for network use in a building. 

Just as it is immune to EMI from outside sources, fiber produces no electronic emissions and, therefore, is not a concern of the Federal Communications Commission (FCC) or European emissions regulations. Crosstalk does not occur in fiber systems, and there are no shared sheath issues as with multipair UTP cables. Because all-dielectric cables can be used, grounding concerns can be eliminated and lightning effects dramatically reduced. Optical fibers are virtually impossible to tap, making it the most secure media type. Most importantly, optical bandwidth cannot be adversely affected by installation conditions. Compare this to the dramatic effects that an installer can have with crosstalk in a copper system. 

Optical fiber cable installation is as simple and, in many cases, much easier than installing coaxial or UTP cable in the horizontal network. The most important factor in optical fiber cable installations is maintaining... 

Fiber in the horizontal is a reality because of the recent advances in technology easing installation, reducing the overall system cost, and offering a system that is reliable, flexible, certifiable, and future proofed for the information era. Aminimum of a two-fiber, 62.5-/zm cable is recommended for data communications and a separate category 3 UTP cable for voice. In determining the fiber count of the horizontal data cables, there are two distinct network possibilities. 

Since SOME/IP and FTP are based on the IP, video information is transported via the AVB transport protocol specified in IEEE 1722. With the introduction of the BroadR-Reach Ethernet physical layer, a connection via a UTP cable became possible. The OPEN Alliance SIG supports the process of adoption of Ethernet as an automotive network. For more details see [20]. The IEEE 802 group is working on an automotive GBit/s specification called length reduced Gigabit Ethernet. 

A UTP, or 10 BaseT Ethernet, is realized with a point-to-point topology. Generally a computer is located at one end of the segment and the other end is terminated in a central location with a repeater or hub. Since UTP is often run in conjunction with telephone cabling, this central location can be a telephone closet or other area where it is convenient to connect the UTP segment to a backbone. UTP segments are limited to 100 meters, but UTPs point-to-point nature allows the rest of the network to function correctly if a break occurs in a particular segment. 

We usually break twisted-pair cabling into two types unshielded twisted-pair (UTP) and shielded twisted-pair (STP). UTP is simply twisted-pair cabling that is unshielded. STP is the same as UTP except that STP has a braided foil shield around the twisted wires (to decrease electrical interference). 

UTP Acronym for unshielded twisted-pair. A type of unshielded network cable that contains multiple conductors in pairs that are twisted around each other. 

Fiber optic, or lOBaseFL Ethernet, is similar to UTP. Fiber optic cable is more expensive, but it is invaluable for situations where electronic emissions and environmental hazards are a concern. The most common situation where these conditions threaten a network is in LAN connections between buildings. Lightning strikes and current loops due to ground potential differences can wreak havoc and easily destroy networking equipment. Fiber optic cables... 

Centralized optical fiber cabling is intended as a cost-effective alternative to the optical horizontal cross connect when deploying 62.5 )u.m optical fiber cable in the horizontal in support of centralized electronics. Whereas category 5 UTP systems are limited to 100-m total length and require electronics in each closet for high-speed data systems. 

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