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Fibre Optic Cable/Optical Fibre Cable: The Optical Fibre Cable consists
of a central glass core, surrounded by several layers of protective
materials. Optical fibre cable has the ability to transmit signals over

much longer distances than those covered by coaxial and twisted pair. It
also has the capability to carry information at very high speed. This
capacity broadens the communication possibilities to include services
such as video conferencing, etc.

Wireless Transmission Media
The transmission in such a media is wireless. It is used to provide wireless network

communication over short distances using radio or infrared signals, instead of network cabling.
Some of the wireless transmission media are as follows:
Radio Wave Transmission: Radio waves transmit music, conversations, pictures and data
invisibly through the air, often over millions of miles. Radio waves travel in all directions from
the source, so that the transmitter and the receiver do not have to be carefully aligned physically.

These are easy to generate, can travel long distances and penetrate through buildings easily. The
two common technologies that use radio frequency waves to create a network are Bluetooth and
Wi-Fi.

a. Bluetooth Wireless Technology: Bluetooth is a
wireless technology that lets you talk and share
information like voice, music and videos. Bluetooth
technology was invented in 1994 by engineers at
Ericsson, a Swedish company. It is built into electronic
gadgets.

Mobile phone, FM radio and television, all use different
kinds of radio waves to send information such as audio
and videos without using wires. Bluetooth technology
also uses radio waves. The biggest difference between

Bluetooth technology and devices like FM radio and TV
is 'distance'. Radios and TVs are meant to broadcast
information to many people over miles or kilometres. Bluetooth technology sends information
within its personal space, which is called 'PAN'. The maximum data transmission range of
Bluetooth technology is 10 meters (33 feet).

A product 'with Bluetooth' means it has a piece of hardware as well as software to connect that
product with other products wirelessly, using the Bluetooth technology.

Extra Bytes
The name Bluetooth comes from the name of an ancient king Harald Blatand of Denmark
(Blatand is a Danish term which translates to Bluetooth in English). Bluetooth's founder
members include Ericsson, IBM, Intel, Nokia and Toshiba.

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