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The widespread use of the GSM standard has made it easy for most mobile phone users to use their phones overseas thanks to roaming agreements between operators using the same GSM standard. The first GSM network went live in in Finland. GSM introduced the concept of the SIM card Subscriber Identity Module card - a detachable smart card that lets users swap their phone number and contacts between handset.
The high data speeds are possibly the most prominent feature, and certainly the most hyped. They enable such advanced features as live, streaming video. There are several different 3G technology standards. A thin client is added to the mobile phone and by using standard SMS parameter fields, such as the user data header, binary-encoded and concatenated messages can be sent that display enriched content, such as italicized, emboldened or underlined text, predefined sounds, monophonic tunes and static or animated images.
This media may include up to forty seconds of video, audio, one image, or a slideshow of multiple images. Bluetooth is a short-range wireless technology used to create PANs Personal Area Networks among your devices, and with other nearby devices. Bluetooth allows you to leave your phone in your pocket, while talking on your phone with a Bluetooth headset - with no wires.
You can also exchange contact or scheduling information with other Bluetooth-enabled phones nearby, or send such information to a nearby Bluetooth-enabled printer. Another common use is to give your laptop computer or PDA wireless high-speed Internet access via Bluetooth and your phone. Many newer automobiles also have Bluetooth, which can interface with a phone in a pocket, to allow automatic hands-free phone capability. More innovative uses include playing a game against someone with a similar phone nearby, or using a special Bluetooth pen to send SMS messages by simply writing them on paper.
GPRS is known as a 2. One of the early advantages of GPRS is that it s always on so no connection handshake is needed. It is still very popular, especially in the developing world. This is a 2. Wi-Fi - A type of network that makes use of radio channels to connect either to a local area network LAN or a router linked to the Internet.
Companies often have a Wi-Fi system installed inside their buildings. Then visitors and workers with laptops can instantly connect to their LAN. There are also publicly available Wi-Fi links to the Internet. These are called Hot-Spots and may be found in airports, train stations and some cafes. Wi-Fi does include built-in methods of making a network secure, for example turning on WPA Wi-Fi Protected Access or WEP will only allow authorised users to connect but many people do not bother to switch these methods on, with the result that anyone nearby can connect and access their network.
A high-speed data technology for GSM networks. An alternative to GPRS. Adopted mostly in Europe. A CSD connection is considered a data "call". A CSD data call is very similar to a voice call, except with the voice codecs disabled. A CSD call therefore occupies the came bandwidth as a voice call.
Unlike packet-based technologies, a CSD or HSCSD data call uses the same amount of bandwidth at all times, regardless of whether data is being transmitted at any given moment. Universal Serial Bus USB : A standard port that enables you to connect external devices such as digital cameras, scanners, keyboards, and mice to computers. The USB standard supports data transfer at three rates: low speed 1.
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