In wireless technology instead of cable we use radio signal to transfer data, voice and images. In this technology data in origin place with modulation will be converted to radio wave and in destination it will be convert to data again.
Wireless technology advantages
Easy installation: installing wireless system doesn’t need any wire or plug or duct and runs with higher speed and easier.
Mobility:
In cabling systems there is no possibility of movement. Devices connected to the network should be placed near the plug. In wireless system because of using wireless wave for data transmission devices can move in wireless covered area.
Easy expansion
In cabling system for adding a new node we need to install a cable from central rack to the node but in wireless system you need just add a wireless adaptor in the system.
Long distance coverage:
Copper cables can transmit data up to 100 meter. Fiber optic has its cost and sometimes digging. With wireless system you just install two wireless device and that’s it.
Not facing cabling problems:
Cabling in some places such as historic places, rental apartment, high places and etc. is forbidden or difficult. Wireless is the solution for this places.
Wireless disadvantages
Speed: data transmission over cabling system in total is faster than wireless system. However wireless speed is growing up but still cable is more sufficient.
Security:
Cabling system security is much more than wireless. Wireless wave can be sniffed in the air but for cabling you need to connect physically somehow.
Stability:
This is the most cabling advantage rather than wireless. Stability in cabling system is incomparable to wireless.
Wireless devices and accessories
Wireless adapter: main device which transfer data and convert it to wave.
Antenna: wireless adaptor for sending and receiving data need antenna. Antenna are made in different types
Dish Antenna, Parabolic, Sector, Omni, Yagi, Flat panel, Grid
Pigtail: is a short cable for connecting wireless adaptor to antenna
Connector: junction between pigtail and wireless adaptor
Box: housing place for installing wireless board
Wireless types:
Warless can be classify in some groups
Outdoor wireless: for transmitting data between two points in long distance which usually installed on the towers
Indoor wireless: for establishing a wireless communication inside a building
PTP (Point to Point): to connect two points to each other
PTMP (Point to Multipoint): to connect multiple points to one point
Frequency: wireless radios act in different frequencies. Some of them is free band that include 900 MHz, 2.4 GHz and 5.8 GHz. For other frequencies you need license.