Cell phones: A wireless Way to Speak!!!!

A mobile phone or cell phone is an electronicand pre-cellular mobile phones such as those
telecommunications piece of equipment. Theoperating via MTS that do not have a cellular
majority of current cell phones connect to thenetwork, while the related term cell(ular) phone
network using a wireless radio wave transmissiondoes not. In actual fact, the two terms are used
technology, although satellite phones arealmost interchangeably, with the favored term
exceptions. These cell phones communicate byvarying by location.
means of a cellular network of base stations,Technology on which cell phone works
which are known as cell sites, which is in turnCell phones and the network they function under
linked to the conventional telephone network andvary a lot from provider to provider, and even
were first introduced in the early to mid 1980s,from nation to nation. On the other hand, all of
the so called 1G generation.them communicate through electromagnetic radio
Earlier cell phones operating without a cellularwaves with a cell site or base station, the
network, the so-called 0G generation, such asantennas of which are by and large mounted on a
Mobile Telephone Service, date back to 1946. Intower, pole, or building. The cell phones have a
anticipation of the mid to late 1980s, most celllow power transceiver so as to transmit voice
phones were sufficiently big that they were timeand data to the nearby cell sites, usually 5 to 8
and again permanently installed in vehicles as carmiles away.
phones. In the midst of the advance ofWhen the cellular phone or data device is turned
miniaturization, at this time the vast majority ofon, it registers with the mobile telephone
cell phones are handheld.exchange, or switch, with its only one of its kind
Features of a cell phoneidentifiers, and will then be alerted by the mobile
In addition to the usual voice function of aswitch as soon as there is an incoming telephone
telephone, a cell phone can hold up many additionalcall. The handset continuously listens for the
services such as SMS for text messaging, packetstrongest signal being received from the
switching for access to the Internet, and MMS forneighboring base stations. As the user moves in
transferring and receiving photos and video. Athe region of the network, the mobile device will
number of the world's largest cell phonehand off to new cell sites.
manufacturers consist ofCell sites have comparatively low power (habitually
• Alcatelonly one or two Watts) radio transmitters, which
• Audiovoxbroadcast their being there and relay
• Fujitsucommunications involving the mobile handsets and
• Kyocerathe switch. The switch in turn connects the call to
• LGa different subscriber of the same wireless
• Motorolaservice provider or to the public telephone
• NECnetwork, which includes the networks of other
• Nokia,wireless carriers. The conversation between the
• Panasonic (Matsushita Electric)and a lothandset and the cell site is a stream of digital data
more.....that includes digitized audio (except for the first
There are in addition specialist communicationsgeneration analog networks).
systems related to, but separate from cellThe technology or the know-how that achieves
phones, such as Professional Mobile Radio. Mobilethis depends on the system that the cell phone
phones are also distinct from cordless telephones,operator has adopted. A number of technologies
which in general operate only within a limited rangeinclude AMPS for analog, and TDMA, CDMA, GSM,
of a specific base station. Technically, the termGPRS, EV-DO, and UMTS for digital
cell phone includes such devices as satellite phonescommunications.