Phone Networks..

Phone features...

 

PHONE FEATURES.....

Definitions of phone features...
Bluetooth - This wireless technology enables communication between Bluetooth-compatible devices. It is used for short-range connections between desktop and laptops and mobile phones.
Memory card-An electronic flash memory, storage disk commonly used in consumer electronic devices such as cameras, Mp3 players, Mobile phones, and other small portable devices
Camera- Device on your phone that takes pictures.

Wi-Fi- is the name of a popular wireless networking technology that uses radio waves to provide wireless high-speed Internet and network connections.Alarm -Any sound or information intended to give notice of approaching danger; a warning sound to arouse attention; a warning of danger.
USB port- A USB port is a standard cable connection interface on personal computers and consumer electronics. USB ports allow stand-alone electronic devices to be connected via cables to a computer (or to each other).
MMS- The MMS specification allows for the creation of messages sent from one mobile phone to another that can contain text, pictures, audio, and video.
Loudspeaker-

A device that converts electric signals to audible sound.

Games - Mobile games are played using the technology present on the device itself. For networked games, there are various technologies in common use
3G - 3G technologies enabled faster data-transmission speeds, greater network capacity and more advanced network services.
Hands free Device- A hands free device is an apparatus used with cell phones that permits the user to talk on the phone without holding it.
Touchscreen-A type of display screen that has a touch-sensitive transparent panel covering the screen. Instead of using a pointing device such as a mouse or light pen, you can use our finger or point directly to objects on the screen.

Video calling -
Technology for conducting audio and video interaction in real time between users at disparate locations. Video chats are typically conducted via a computer, tablet or smartphone device

GPS- GPS satellites continuously transmit digital radio signals that contain data on the satellites location and the exact time to the earth-bound receivers

Internal memory -The computer can manipulate only data that is in main memory. Therefore, every program you execute and every file you access must be copied from a storage device into main memory
Personal organiser - a handheld device that combines computing, telephone/fax, Internet and networking features
Memo- Short for electronic mail, the transmission of messages over communications networks.

Calculator- A small hand-held computer that performs mathematical calculations
SMS -  Short for Short Message Service Similar to paging, SMS is a service for sending short text messages to mobile phones.
Network Band -

Also called a frequency guard band, a narrow frequency band between adjacent channels in multiplexing that is kept unused to prevent the channels from overlapping and causing crosstalk among modulated signals.
Radio - It uses direct broadcasting satellites (DBS) a type of satellite used for consumer services such as radio and television programs
Camcorder -An electronic device that contains both a video camera and recording device
Internet-The Internet is a global network connecting millions of computers. More than 100 countries are linked into exchanges of data, news and opinions
Email - the transmission of messages over communications networks. The messages can be notes entered from the keyboard or electronic files stored on disk.

Predictive text - If your cell phone has a predictive text feature and you have activated it, it will keep track of what you type as you compose messages, write memos, or enter search terms in a browser. The most commonly used words for a particular key sequence will pop up
Voice recorder- is a portable device that allows you to record ones own voice, and thoughts, for later playback, to be put into print or remembering key events.
Roaming - In wireless networking, roaming refers to the ability to move from one AP coverage area to another without interruption in service or loss in connectivity
 
 

 How a phone Works....
Millions of people in the United States and around the world use cellular phones. They are such great gadgets -- with a cell phone, you can talk to anyone on the planet from just about anywhere!
These days, cell phones provide an incredible array of functions, and new ones are being added at a breakneck pace. Depending on the cell-phone model, you can:

store contact information

Make task or to-do lists

Keep track of appointments and set reminders

Use the built-in calculator for simple math

Send or receive e-mail

Get information (news, entertainment, stock quotes) from the Internet

Play games

Watch TV

Send text messages

Make phone calls.

In the dark ages before cell phones, people who really needed mobile-communications ability installed radio telephones in their cars. In the radio-telephone system, there was one central antenna tower per city, and perhaps 25 channels available on that tower. This central antenna meant that the phone in your car needed a powerful transmitter -- big enough to transmit 40 or 50 miles (about 70 km). It also meant that not many people could use radio telephones -- there just were not enough channels.
Let's say you're on the phone and you move from one cell to another -- but the cell you move into is covered by another service provider, not yours. Instead of dropping the call, it'll actually be handed off to the other service provider.

-In 1983, the analog cell-phone standard called AMPS (Advanced Mobile Phone System) was approved by the FCC and first used in Chicago