Network and Telecommunications

Wire Technology

Since year 1900, wired technology become famous because of the telephone network. Using physical wires means that electronic singles are being transmitted over a metal conductor. This is a good way to transmitting and receiving information. For purposes of this article, “wired” refers to copper wiring and does not include fiber optic technologies.Telecommunications channels have 3 types of wired which are twisted-pair wire, coaxial cable and fiber optics cable.
1)Twisted-Pair Wire
- ordinary telephone wire
- copper wire is twisted into pair
- cheap and easy to install

2)Coaxial Cable
- study copper or aluminum wire wrapped with spacers to insulate and protect it
- commonly used in television cable

3)Fiber Optics Cable
- One of more hair-thin filaments of grass fiber wrapped in a protective jacket
- uses pulses of laser-generated light
- faster transmission speeds
- freedom from electrical interference
- less susceptible to interference (noise) and therefore more secure
- smaller size (thinner and lighter)

Pro's of the wire technology:
- reliable - Not affected by other wireless signals (portable/cellular phones, microwaves, etc)
- price is cheap
- high life expectancy
- high speed

Con's of the wire technology:
- affected by moisture and other weather conditions
- can be affected by noise generated by machinery and magnetics
- length of wire runs limited


Wireless Technology
Wireless technology used when incovenient, impractical or impossible to install cables.Wireless technology do not have a strictly a transmission media but rather a technology in which radio signals are sent through the air.There are many different wireless technologies such as cordless telephones and cellular telephones which are widely used in personal and business communications.Types for wireless technology:
1) Wireless LAN (e.g wi-fi)
- uses wireless radio-wave technology to connect PCs within an office or a building
- can be high-frequency, similar to digital cellular, or low frequency (spread spectrum)

2) WiMAX (802.16e)
- newest of the network types
- similar to Wi-Fi, but operates over longer distances and higher speeds
- can used both licensed and non-licensed frequencies

3) Bluetooth
- short-rage wireless technology
- connects PCs to divices such as a printer
- fairly low cost to implement

Pro's of wireless technology
- convenient
- range
- high life expectancy

Con's of wireless technology
- un-reliable - affected by other wireless signals (portable/cellular phones, microwaves, etc)
- price is high
- signals can be easily intercepted
- speeds are much slower than wired