ABOUT CELLULAR (cellular shop, cellular world, cellular world bali, cellular news, cellular movie, cellular automata, cellular one,cellular phone, celluar city, cellular shopn jakarta)

Definition
The communication system used to provide telecommunications services for customers moving.Called a cellular system because of its service area is divided into small areas called CELL.NATURE: The customer is able to move freely within the service area while communicating without termination.

Standart WiFi (Wireless Fidelity)

IEEE 802.11a

• Maximum Data Rate is 54 Mbps
• Modulation : Orthogonal Frequency Division Multiplex (OFDM)
• Nominal ERP : + 16 dBm with 6dBi Antenna
• Range : 30 m (indoor) and 300 m (Outdoor)
• Maximum number user : up to 256 per Access Point
• Roaming berwen Acces Point

IEEE 802.11b

• 11 Mbps Maximum data rate per kanal
• Modulation DSSS ( Direct Sequence Spread Spectrum)
• Nominal ERP : + 10 - +23 dBm
• Range : 90 m (indoor) – 450m (Outdoor)
• Maximum number user : up to 256 per Access Point
• Roaming between Access Point

IEEE 802.11g

• 54 Mbps Maximum data rate per kanal
• Frequency : 2,40 – 2,4835 GHz
• Modulation : Orthogonal Frequency Division Multiplex (OFDM)
• Nominal ERP : + 10 - +20 dBm
• Range 100 m (indoor) – 400m (Outdoor)
• Maximum number user : up to 256 per Access Point

Roaming between Access Point

Understanding Telecommunications

Telecommunications composed of two letters, telephone and communications, tele meaning remote, and communication means relationships, can be interpreted as long-distance communication.
Telecommunication is transmission of signals over a distance for the purpose of communication. In earlier times, this may have involved the use of smoke signals, drums, semaphore, flags or heliograph. In modern times, telecommunication typically involves the use of electronic devices such as the telephone, television, radio or computer. Early inventors in the field of telecommunication include Alexander Graham Bell, Guglielmo Marconi and John Logie Baird. Telecommunication is an important part of the world economy and the telecommunication industry's revenue was estimated to be $1.2 trillion in 2006.

Source : wikipedia.org/wiki/Telecommunication