Starcom

Interesting Facts About Cell Phones by

Cell phone is a wireless, portable, long-range, electronic telephone, which during travel can seamlessly change antenna connections, from one radio reception cell to another radio reception cell, without dropping or losing the ongoing call.

Besides the standard voice function of a telephone, latest cell phones have features such as SMS for text messages, MMS for multimedia messages, radio, games, internet connectivity for email, browsing, blogging, music (MP3) playback, memo recording, built-in cameras and camcorders, ringtones, personal organizers, Push-to-Talk (PTT), Bluetooth and infrared connectivity, call registers, streaming video, downloading video, video call, and also serve as wireless modems for PCs that can be connected to the Internet.

The power in a cell phone is obtained from rechargeable batteries, which can be recharged from the mains, a USB port or a cigarette lighter port in an automobile. Nickel Metal Hydride were the most common types of batteries, which due to the "memory effect" (the user can recharge only when the entire battery is drained off) were replaced by Lithium-Ion batteries, which did not suffer from any memory effect.

Cell phones came into existence because of the invention of hexagonal cells in 1947, for the base stations by Bell Labs engineers at AT&T. This was further developed during the 1960s by Bell Labs. During a call, the channel frequency could not be changed automatically from one cell (base station coverage area) to another cell (base station coverage area) as the person traveled from the area of one cell to the area of another cell. Amos Joel of Bell Labs invented a breakthrough invention and called it as the 'call handoff' by which the channel frequency could be changed automatically from one cell to another cell, during the same call, as the mobile user traveled from one cell to another cell. Due to their heavy construction, these phones were used mainly in automobiles.

The first practical cell phone in a non-vehicle setting, and which could be handheld, was invented by Martin Cooper, the General Manager (Communications Division) of Motorola, who made the world's first handheld cell phone call on April 3, 1973.

The technology by which the cell phone works depends on the mobile phone operator; however, all of them use electromagnetic radio waves, which are in touch with a cell site (base station). The base station is composed of several antennas which are mounted on a pole, tower, or building. Cell sites are spread at a distance of 5 to 8 miles (approx. 8 to 13 km) from each other. The low power transceiver from the cell phone transmits the voice and data to the nearest cell site. During movement, the cell phone will "handoff" the information to other cell site. Mobile phone operators use many technologies to maintain the smooth stream of digitized data from the cell phone to the cell site and vice versa.

The wireless telephone technologies are grouped under heads known as generations, starting from zero generation or 0G. The current generation going on is 4G; however, there are old cell phones that still operate on 1G, 2G, and 3G technologies. The wireless telephone technologies used in each generation are as given below:

0G: PTT, MTS, IMTS, AMTS, OLT, MTD, Autotel/PALM, ARP
1G: NMT, AMPS/TACS/ETACS, Hicap, CDPD, Mobitex, DataTac
2G: GSM, iDEN, D-AMPS, IS-95/cdmaOne, PDC, CSD, PHS, GPRS, HSCSD, WiDEN, CDMA2000 1xRTT/IS-2000, EDGE (EGPRS)
3G: W-CDMA, UMTS (3GSM), FOMA, TD-CDMA/UMTS-TDD, 1xEV-DO/IS-856, TD-SCDMA, GAN (UMA), HSPA, HSDPA, HSUPA, HSPA+, HSOPA
4G : UMB, UMTS Revision 8 (LTE), WiMAX

Frequency bands: SMR, Cellular, PCS

The impact of cell phone usage on human health has been of considerable worldwide concern. Research studies in Copenhagen, from the Danish Institute of Cancer Epidemiology, the National Cancer Institute, and the Institute of Cancer Research, do not establish any link between cancer and cell phone usage. However, an intergovernmental agency IARC (International Agency for Research on Cancer) forming part of the World Health Organization of the United Nations, undertook a study of 4,500 users and found a statistically significant link between cell phone usage and tumor frequency. Further research is going on.

Cell phone usage and driving is a common worldwide phenomenon. Some jurisdictions have banned usage of hand-held phones during driving, but allowed the hands-free fashion of cell phone usage while driving. However, studies have found out that the distraction is caused by the conversation itself; hence, both hand-held and hands-free cell phones contribute towards road traffic accidents. Further studies on cell phone usage and driving are going on.

Nokia Corporation is currently the world's largest manufacturer of cell phones. Other notable cell phone manufacturers, in alphabetical order, are 3G, Audiovox (now UT Starcom), Benefon, BenQ-Siemens, Fujitsu, High Tech Computer Corporation (HTC), Kyocera, LG Mobile, Motorola, NEC, Panasonic (Matsushita Electric), Pantech Curitel, Philips, Research In Motion, Sagem, Samsung, Sanyo, Sharp, Siemens, Sierra Wireless, SK Teletech, Sony Ericsson, T&A Alcatel, Toshiba, and Verizon.

This article can also be accessed in portuguese language from the News Article section of page www.polomercantil.com.br/celular.php
Roberto Sedycias works as IT consultant for www.PoloMercantil.com.br

Article Source: http://www.earticlesonline.com/Article/Interesting-Facts-About-Cell-Phones/161952

FEATURED PRODUCTS:

A great place to shop for Starcom products is Amazon.

Check out these fine shops that offer Starcom products:

Cellet Retractable Car Charger w/ 5 Different Connectors for UT Starcom PPC-6700, G'zOne Boulder $14.99 The Cellet Retractable Plug in car charger has lots of features which makes this charger one of the elites. With such a small design that is light weight and easy to carry around, the Cellet car charger will not take up extra room for its usage. The rubberized coating protects this device from slipping, which can cause damage to the product. To prevent from over heating and over charging, the IC chip prevents those situations from occuring. This great product allows non interrupted charging even while the phone is being used. You can see with all these great features found in this one low price car charger, it will be hard to find a better offer. Meanwhile, retract the cable with the easy to use button located on the top of the charger. Just press down to retract the full length of the cable. This cell phone charger keeps your cell phone powered up and eliminates wire tangles and mess. Multi-connectors also provide versatility on charging capability. Type: Charger & Adapter Compatible Phone Manufacturer: Universal

Lenmar 650mAh Battery for Utstarcom Cell Phone (CLZ324UT) $16.31 Type: Replacement Battery Compatible Phone Manufacturer: UT Starcom Chemical: Li-Ion Volt: 3.7 Volt Specifications: Replaces: Pantech PBR-C740, UTStarcom BTR-8B

6-foot USB Charger Cable Cord for Sony PS3 Controller (Pack of 2) $12.98 This is a set of 2 USB 6-foot charger cables for Sony PS3 controller. Transfer images and data between your camera and PC through the USB port.Quality plugsHigh data transmission rateBest replacement for original cableColor: BlackLength: 6-footConnector: Type A to Mini 5-pin Type BCompatibleAudiovoxBlackBerryCanonCingularDopodGarminHTCi-mateMIOMotorolaNextelO2OrangeOtekSonyT-MobileTomTomUT StarcomWarning: California residents only, please note per Proposition 65 that this product may contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

Other Products Purchased from this website:
ut starcom audiovox cdm8910 verizon cell phone, ut starcom cdm8964 black virgin mobile fair condition, ut starcom dc060715lrr rechargeable battery 37v, ut starcom pcdwpd8990 escapade verizon red good condition, new car charger amp; case ut starcom 7025, new oem ut starcom cdm8950 blitz battery btr8b verizon, vintage tomy starcom tabletop pinball, audiovox ut starcom pm 8920 pm8920 cell phone , new cricket wireless ut starcom cdm7025 home charger, new oem ut starcom btr8b cricket txt8026 txtm8 battery, new oem ut starcom cdm8950 blitz txt8010 battery btr8b , new oem ut starcom btr8b txt8010 blitz cdm8930 battery, ut starcom pcmcia 3g mobile high speed pc card pls5750, vintage 1987 coleco starcom skyroller motorized highrising super tank works, starcom by coleco shadow parasite with lt magg action figure, starcom by coleco m6 rail gunner with action figure, ut starcom cdm8990 escapade verizon cell phone, vstar 1100 curburner exhaust v star vstar extreme, new ut starcom verizon txt8030 razzle btr8030 battery , oem votec hometravelcar charger for ut starcom 8630 8935 acdc inverter, lot of 25 oem ut starcom btr75 btr75 silver grey att battery, car charger for ut starcom 8630, car charger for ut starcom blitz, car charger for ut starcom 8935 mini, car charger for ut starcom 8950 rhapsody, 2 new oem ut starcom btr8999 pantech crux battery, 2 new oem ut starcom btr75 btr75 silver grey att battery, oem quickfire atamp;t btr75 ut starcom 1200mah battery, new oem ut starcom btr75 btr75 silver grey att battery, starcom toys, starcom vintage shadowbat with 2 figures railgunner rare, ac house and travel charger for ut starcom cdm 8945, ac house and travel charger for ut starcom cdm 105, ac house and travel charger for ut starcom cdm120, ac house and travel charger for ut starcom cdm180, ac house and travel charger for ut starcom cdm8410, ac house and travel charger for ut starcom cdm8900, ac house and travel charger for ut starcom cdm8910, ac house and travel charger for ut starcom cdm8915, ac house and travel charger for ut starcom cdm8932, ac house and travel charger for ut starcom cdm7025, ac house and travel charger for ut starcom blitz, ac house and travel charger for ut starcom 8630 coupe, ac house and travel charger for ut starcom 8935 mini, new utstarcom usb y cable yc150b ut starcom, vintage mattel starcom star wing starwolf f1400 fighter ship boxed wfigure, huge lot of vintage starcom 30 figures 8 vehicles weapons accessories , 1988 starcom sticker fun book tv show unused, vintage starcom 1990 cpl slash figure shadow force mattel moc, verizon oem ut starcom pantech pcd txt8030 razzle 920mah battery std, vintage starcom lot shadow parasite star wolf railgunner unknown figure used

Tagged with: media • starcom • starcom careers • starcom chicago • starcom detroit • starcom mediavest careers • starcom mediavest group • starcom mediavest group chicago • starcom mission control • starcom toys • starcom1 • starcomm • Toys

Filed under: Toys

Like this post? Subscribe to my RSS feed and get loads more!