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Cabling Notes

In: Computers and Technology

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What is the speed of light- 186000miles a second or 700 million miles an hours?How fast dose sound travel.-340mdHow fast dose sound travel in water -33502mph |

Cabling Notes 6/20/12

Name three rules of Data cabling 1. Networks never get smaller or less complicated. 2. Don’t scrimp on installation cost. Quality components and cable must be installed, No poor workmanship allowed. 3. Plan for higher –speeds technologies than are commonly available today. Just because 1000Base-TEthernet seems unnecessary today doesn’t mean in five years you will need to use it.

The cost of poor cabling – The cost that results from poorly planned and poorly implemented cabling systems can be staggering.

Robert Metcalfe (Inventor of the Ethernet, founder of 3Com, columnist for InfoWorld, and industry pundit).
Drop-rate magnification-The high degree of network problems caused by dropping a few packets.
Note: a single dropped packet may cause an entire stream of packets to be retransmitted.

ANSI-(American National Standards.)

Application- a program on a computer. A system, the transmission method of which is supported by telecommunications cabling, such as 100Base-TX Ethernet, or digital voice.

Digital- on the other hand is breaking the signal into a binary format where the audio or video data is represented by a series of "1"s and "0"s. Simple enough when it's the device—analog or digital phone, fax, modem, or likewise—that does all the converting for you.

Digital technology- breaks your voice (or television) signal into binary code—a series of 1s and 0s—transfers it to the other end where another device (phone, modem or TV) takes all the numbers and reassembles them into the original signal. The beauty of digital is that it knows what it should be when it reaches the end of the transmission. That way, it can correct any errors that may have occurred in the data transfer. What does all that mean to you? Clarity. In most cases, you'll get distortion-free conversations and clearer TV pictures.

What is the stander for telephone –RJ11

Proprietary- is designed for one systems state of the art the most expensive.

What are the 3 types of technology. 1. FDDI – Fiber Distributed Data Interface. 2. 16mb Token ring 3. 10mb Ethernet the fastest

Attenuation- is a general term that refers to any reduction in the strength of a signal.

bandwidth/ˈbandˌwidTH/
Noun:
1.A range of frequencies within a given band, in particular.
2.The range of frequencies used for transmitting a signal.

Dark fiber- fiber that is not in use.
Coaxial Cable -copper in the middle

Fep-Fluorinated ethylene- propylene (FEP)
A thermoplastic with excellent dielectric properties that is often used as insulation in plenum-rated cable. FEp has good electrical-insulation properties and chemical and heat resistance and is an excellent alternative to PTFE (Teflon). FEp is the most common material used for wire insulation in Category 5 and better cables that are rated for use in plenums.

Pe-Polyethylene- A thermoplastic material with excellent electrical properties. PE is used as an insulating material and as jacket material where flame-resistance requirements allow.

Pp-

Plenum- The air-handling space between the walls, under structural floors, and above drop ceiling when used to circulate and otherwise handling air in a building. Plenum-grade cable can be run through these spaces if local building codes permit it.
PVC is useful because it resists two things that hate each other: fire and water. Because of its water resistance it's used to make raincoats and shower curtains, and of course, water pipes. It has flame resistance, too, because it contains chlorine. When you try to burn PVC, chlorine atoms are released, and chlorine atoms inhibit combustion.
Riser –Riser (CMR) Rated Cable
Compiles with UL-1666. Defined for usage in vertical tray applications such as cable runs between floors through cable risers or in elevator shafts. These spaces cannot be used for environmental air. These cables must self-extinguish and must also prevent the flame from traveling up the cable in a vertical burn test.

Fiber optic cable- * Transmission distances are much greater than with copper cable. * Bandwidth is dramatically higher than with copper. * Fiber optic is not susceptible to outside EMI or crosstalk interference, nor is dose generate EMI or crosstalk. * Fiber-optical cable is much more secure than copper cable because is it extremely difficult to monitor, “eavesdrop on,” or tap a fiber cable

Ripcord – a length of string built into optical fiber cables that are pulled to split the outer jacket of the cable without using a blade.

Nfpa- The national Fire Protection Association
UL- The Underwriter Laboratories

Pcc- the Premise Communication Cord standards for physical wire tests defined by the CSA. Frequency is measured in the hertz unit.
Cable length – A unit of length equal to 720 feet (220 meters) in the United States and 608 feet (185 meters) in England.

Conductor length – A material or substance (usually copper wire) that offers low resistance (opposition) to the flow of electrical current.
Sign wave-One complete cycle.

Halogen – One of the following elements: chlorine, fluorine, bromine, astatine, or iodine.

Hertz- (HZ) A measurement of frequency defined as cycles persecond.

FDDI-FDDI (Fiber Distributed Data Interface) is a standard for data transmission on fiber optic lines in a local area network (LAN) that can extend in range up to 200 km.

http://www.thefoa.org/tech/ref/basic/jargon.html

Assignment what is fiber optics ?…...

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