Technology

Cellular systems
Mobile phones send and receive radio signals with any number of cell site base stations fitted with microwave antennas. These sites are usually mounted on a tower, pole or building, located throughout populated areas, then connected to a cabled communication network and switching system. The phones have a low-power transceiver that transmits voice and data to the nearest cell sites, normally not more than 8 to 13 km (approximately 5 to 8 miles) away.

When the mobile phone or data device is turned on, it registers with the mobile telephone exchange, or switch, with its unique identifiers, and will then be alerted by the mobile switch when there is an incoming telephone call. The handset constantly listens for the strongest signal being received from the surrounding base stations. As the user moves around the network, the mobile device will "handoff" to various cell sites during calls, or while waiting (idle) between calls it will reselect cell sites.

Company Will Monitor Phone Calls to Tailor Ads

Company Will Monitor Phone Calls to Tailor Ads
Companies like Google scan their e-mail users’ in-boxes to deliver ads related to those messages. Will people be as willing to let a company listen in on their phone conversations to do the same? Pudding Media, a start-up based in San Jose, Calif., is introducing an Internet phone service today that will be supported by advertising related to what people are talking about in their calls. The Web-based phone service is similar to Skype’s online service — consumers plug a headset and a microphone into their computers, dial any phone number and chat away. But unlike Internet phone services that charge by the length of the calls, Pudding Media offers calling without any toll charges.

Nokia 5310 Mobile Phone Review

Do you like music? Do you need a cell phone? If so, then you should definitely consider the Nokia 5310 Mobile Phone. This model offers a marriage of the best that the worlds of portable music and wireless communications have to offer.

The Nokia 5310 phone is smooth as a newly waxed sports car, so you will want to show it off to all of your friends and family members. Yet with a thickness of 9.9 mm, the phone is still perfect for listening to your favorite tunes while jogging around the block or commuting to work or school via a bus, taxi, or subway train. The mobile phone feels solid as a rock when you hold it. While sleek, the aluminium sides and color arrangement causes the phone to appear elegant, yet modest. Nokia’s placing of the 3.5 mm headphone jack at the mobile phone’s top, was an outstanding design choice. This conveniently prevents the cables from becoming knotted up. Also, the music control keys rise up perfectly off the phone’s surface, making them easy to locate when the phone is concealed in a purse or pants pocket.

Sony Ericsson K530i Phone Review

The Sony Ericsson K530i is a result of Sony’s ongoing quest to push the boundaries of mobile communications, offering a massive range of functionality and services. Impressive dimensions of 102 mm x 46 mm x 14 mm and a total weight of only 92g hide much of the potential for this top of the range phone. The design is based around the popular candy bar style, with an enlarged screen and a range of different handset colours.


Supporting the majority of networks available, the Sony Ericsson K530i also has an excellent 2 mega pixel camera, with video and still photograph options. It also has a much improved music offering with media player, music tones and the impressive TrackID (an easy search facility for your favourite songs). As you would expect the handset is compatible with a vast array of messaging services including SMS, MMS and email to name but a few.

The internet access is both quick and reliable, offering your own mobile office for life on the move, with 24/7 availability. The handset also has a number of RSS feeds inbuilt, allowing real time news updates direct to your phone. Perhaps one of the most intriguing developments is the Sat-Nav facility, which requires the introduction of a third party adapter, but has the potential to really take mobile phones into the future. An interesting handset, the Sony Ericsson K530i is sure to be popular.

Nokia N95 Mobile Phone

fter seeing their market share under pressure for some time, Nokia are fighting back with the release of the much heralded N95. Many market observers are predicting that this top of the range smartphone will become the must have phone for 2007, although Nokia’s competitors may have something to say about this!

The Nokia N95 has a very fashionable look, with an impressive front display surrounded by a quality chrome finish. One of the main selling points is the excellent 5 mega pixel digital camera, which has taken mobile phone cameras to a new level. The dimensions of the phone are also impressive, being in the region of 99 mm x 53 mm x 21 mm, with the handset only weighing 120g.

While the Nokia N95 covers the majority of networks available, rather surprisingly the handset does not support US 3G networks, which was surely the perfect way to fully utilise the phones immense capabilities. However, the N95 does cover WCDMA (UMTS), GSM 850 / 900 / 1800 and 1900 networks, ensuring an uninterrupted coverage around the world.

Wireless Communication

The term wireless is normally used to refer to any type of electrical or electronic operation which is accomplished without the use of a "hard wired" connection. Wireless communication is the transfer of information over a distance without the use of electrical conductors or "wires".[1] The distances involved may be short (a few meters as in television remote control) or very long (thousands or even millions of kilometers for radio communications). When the context is clear the term is often simply shortened to "wireless". Wireless communications is generally considered to be a branch of telecommunications.