January 11, 2009

How Cell Phones Work

Filed under: Hardware Infos — admin @ 7:55 pm

A cell phone is nothing but a radio, but very high-tech. It is basically like a CB radio or walkie-talkie. But CB radio or walkie-talkie is a simplex system, where at a time a person can talk or listen. But a cell phone is a duplex device, where a person can listen and talk at the same time. One frequency is used for talking and another for listening. In CB radio 40 channels are used. But in cell phone you can communicate on 1664 channels.

Lets clarify why this phone is called cell phone or cellular phone. The whole network area of the provider is divided into small cells or areas. Each area or cell contains an antenna. When a person moves within the network area carrying a cell phone, the cell phone keeps contact with the local antenna. That’s why it is called a cell phone.

From the service provider each cell phone gets a unique code. This code is used to identify the phone and distinguish from the other. When someone tries to make a call from the cell phone and you turn on the phone a series of events takes place.

When you turn on the cell phone it seeks a system identification code to identify the provider on the control channel. The control channel is a special frequency, which is used for talking. If the phone can’t find any frequency it declares “No Service” message.

When the phone gets the frequency it matches it with the system identification code programmed in the phone. Then the mobile telephone switching office (MTSO) tracks your phone and locates the area your phone is located. After getting a call MTSO looks into the database to locate your phone and identifies the cell you are using. It picks a frequency pair of that cell in which your phone would communicate.

MTSO communicates with the phone through control channel and directs which frequency to use. As soon as the phone and tower tracks the frequency, your phone is connected.

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Pinhole Spy Cameras

Filed under: Hardware Infos — admin @ 7:30 pm

Pinhole spy cameras are defined as state of the art cameras that are so small that they can be hidden inside a picture frame, a stuffed animal, a lamp, or anything else. Most of them are as small as a quarter, and some even newer models are smaller. As one can imagine, the lens is not as “big” as the spy cam but offers a wide viewing range and is practically the only part of the spying instrument that cannot be hidden. Since the camera is so small and can be hidden, they are virtually impossible to detect.

Usually, all that is needed to operate such cameras is a VCR, and a pair of batteries or a 9V battery, depending on the model. Many pinhole spy cameras offer even more than just recording. For example, there are models that have built in smoke detectors, air purifiers, or motion sensors. New pinhole spy camera technology is evolving constantly. The models bought most often are the ones with built in motion sensors, as they start recording only when motion is detected, saving the user lots of time and videotape.

Pinhole spy cameras are often used for surveillance and for protection. Many employers use them to keep track of worker productivity and to keep employees from stealing supplies, and may concerned parents used them to keep an eye on their babysitter.

The signal from pinhole spy cameras can be transmitted to a live feed or it can be recorded for later viewing. These options, along with the relatively low price of the equipment, make pinhole spy cameras a good security investment.

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Matches Designer Fashion Collection

Filed under: Misc Stuff — admin @ 7:20 am

Matches is nowadays a very high ended clothes fashion shop with lots of great achievements. Seventeen years & www.matches.com has seen themselves escalate from one clothes fashion shop to a string of fashion stores in fabulous and popular Notting Hill, rich Richmond and pretty Wimbledon along with their eye-opening online website now as well. Each and every single Matches Shop has a diverse trait and style. All this has resulted in stores that are also as particular and appreciated as their buying public. The Matches philosophy places huge importance on look & creative classic style

Like plenty of other expensive fashion outlets, Matches Fashion Fashion is constantly altering and hosting new novel designers. The Matches staff are capable experts at seeking out the newest necessary items for the particular time of year & constantly focus in and around the key fashion pieces from prominent fashion stylists such as Freda, Christian Louboutin and Chloe along with continued booming fashion designers and new up & coming ones.

Both the fashion outlets & the stunning looking website has had loads of achievement; the fantastic looking web site is like getting into an excellent popular chic desinger fashion monthly mag, it supplies the web site surfers the inspiration they all need to catch sight of designer clothes that could apprearnace great & feel good www.matches.com is always featured in the exclusive fashion magazines such as In style & The Times Magazine.

Check out the latest Freda Fashions at Matches Fashion.