Media Transmision

Transmission media is a medium that usually send information of one place to other place. On network, all that media gets to channel electricity or electromagnetic wave or light get as been used one media consigner, both to send and gets data 

A.     Copper media 

Copper media  are all media data transmission be made ??  of copper. Men usually points to name of cable. Data sends over string, this is signal electrical (voltage or current) digital. 

Type of cable uses for data transmission on network: 

1. Coaxial cable

This cable be often as been used one cable TV antenna. Known also as BNC cable (Naur Connector's bayonet). This cable is cable of the most widely used at LANs, since it what do have protection against obstreperous is higher, less expensive, and is able to send data with one standard speed. 

There is three types from connectors on Coaxial Cable, one that,

T connectors, connector I (socket) and BNC Connectors. Gain of purpose coaxial cable is cheaper than fiber optic cable and so far-reaching distance of UTP / STP'S cable type that use repeater as support. Weakness is difficult at the moment installation, both connector and cable installation. To now coaxial cable is nevermore recommended by intuk networks installation. 

2. Twisted Pair Cable

Twisting Couple consisting of 2 types: 

STP'S cable (Protected by twisted Couple) 

Gain of STP'S cable purpose is more resistant to interfere from electromagnetic wave both from within and from outside. Weakness is expensive, are hard upon installation (particularly ground problem), and only reach one distance of 100m. 

UTP (Couple turns around not shielded) 

Gain of UTP'S cable purpose is cheap and easy for installing. Susceptible weakness goes to electromagnetic wave interference, and only reach one distance of 100m. 

There are several category for Couple cable is writhed, which is: 

• Category 1 (Cat 1). 

Generally use solid conductor default AWG as much pin 22 or 24 by one broad impedances ranges. Used on one connection calls up and not recommended for data transmission. 

• Category 2 (Cat 2). 

One broad impedance ranges, often been used at PBX'S system and alarm system. ISDN'S transmission data cable category 2, with bandwidth maximum of 1 Mbps. 

• Category 3 (Cat 3). 

Often been called voice grade cable, use one solid conductor as much pin 22 or 24 by me mpedance of 100 Ω and presenting 16th MBps. Can used to 10BaseT and Token-ring network with one bandwidth of 4 Mbps. 

• Category 4 (Cat 4). 

As one category 3 by one bandwidths of 20 MBps, apply to one Token-ring network with one bandwidth of 16 Mbps. 

• Category 5 (Cat 5). 

Twisting cable Couple is best (data grade) with one bandwidth of 100 Mbps and maximum transmission ranges of 100 m.

B.     Optical media

There is three types of fiber optic cable  that normally been used, in other words single mode, multi's mode  and plastic optical fiber  that service as one light signal of final cable goes to the other cable final. Of transmitter ^ receiver,   pulsating conversion electronic into light and toing, on form of light-emitting diode  or laser.   Fibers single optic mode  cable is single glass fiber  with one diameter of 8.3 10th micrometers, of one type that transmission gets to pass on capacity data outgrows at high speed for long distance, and requires one light source with one smaller spectral broad. Ability of cable type in announces single mode  of transmission is 50 times faster than multimode  cable type,   since it what do have one smaller fundamental  so as to remove whatever distortion and intersecting light throb. 

   Multimode's optic fiber  cable is made ??  of fiberglass  with one diameter is even greater, in other words 50 100th that micrometer gets to pass on capacity data outgrows at high speed goes to medium reach. If distance is more than 3000 foot, over there will distortion signal on receiver sides which resultant at transmission of inaccurate data.   ’ temporary optical fiber plastic  are cable the latest plastic one ensures same level of performance go to glass fiber  on one short-haul on one there are many cost cheaper. Currently,   fiber optic  cable was used as one default physical coat  data on wait for  of telecom or network, such a cable TV tool, as well as that purpose security system Closed-circuit television (CCTV), etcetera. base ingredient of optical medium is glass with one measure of one weeny (micron scale). Usually is known as optic cable fiber (fiber optic). Data is passed in here medium on shaped of light (laser or infrared). 

Fiber optic single cable consisting of two fibers, one function for Dispatched (Tx) and something for can (Rx) so that communication with fiber optic can happen both aim simultaneously (full duplex). 

C.     Wireless network

Now widely used wireless networks (wireless network), data transmission purpose infrared ray or microwave to pass on data. Although it sounds practical, but obstacle that faces here be problem of distance, bandwidth, and expensive. Anyway, to the need from LAN on building, this is was developed for Active Hub wireless technology (Wireless access Points) and Wireless LAN Cards (NIC substitution), so this gets to reduce cable riot data transmission on one computer network. Wireless Access dot can also be compounded (up link) with ActiveHub of existing network. 

Medias wireless purpose hi-fi radio wave transmission. Usually electromagnetic wave with one frequency of 2.4 GHz and 5 GHz. Digital data to be sent over wireless will be managed into this electromagnetic wave.