This is the outside display usually on flip phones. This is the display that you see when the flip is closed. The main function of this is to see who is calling you without opening the flip.
Caller ID LCD Display Screen
This is the LCD Screen located on the outside of the phone which allows the user to view who is calling without having to open the flip. This LCD Display Screen usually only exists on flip phones.
Caller ID Lens
This is the glass / plastic window that covers and protects the Caller ID LCD Display Screen. Also see Caller ID
Camera Phone
A camera phone is a mobile phone which has a camera built-in and is coupled with a server-based infrastructure or protocol, such as MMS or Bluetooth that allows the user to share pictures and video with someone that has a device adapted to receive pictures and video. Typically the receiving device must have a web browser with messaging or must be capable of decoding and displaying MMS information, as opposed to an ordinary telephone for example. The picture and video are usually delivered after the message recipient requests they be sent in response to a notification of a picture or video message received at a server. This is designed to manage bandwidth and device resources and be "well behaved" to others.
CDMA
Code division multiple access (CDMA) is a form of multiplexing and a method of multiple access that divides up a radio channel not by time (as in time division multiple access TDMA), nor by frequency (as in frequency-division multiple access), but instead by using different pseudo-random code sequences for each user. CDMA is a form of "spread-spectrum" signaling, since the modulated coded signal has a much higher bandwidth than the data being communicated.
To clarify the CDMA scheme, imagine a large room containing many people speaking many different languages. Each group of people speaking the same language can understand each other, but not any of the people speaking other languages. Similarly in CDMA, each pair of users is given a single code which uses the channel. There are many codes occupying the channel, but only the users associated with the code can decode it.
CDMA also refers to digital cellular telephony systems that make use of this multiple access scheme, such as those pioneered by QUALCOMM, and W-CDMA by the International Telecommunication Union or ITU.
CDMA has been used in many communications and navigation systems, including the Global Positioning System and in the OmniTRACS satellite system for transportation logistics.
CDMA2000
CDMA2000 is a hybrid 2.5G / 3G protocol of mobile telecommunications standards that use CDMA, a multiple access scheme for digital radio, to send voice, data, and signalling data (such as a dialed telephone number) between mobile phones and cell sites. CDMA2000 is considered a 2.5G protocol in 1xRTT and a 3G protocol in EVDO.
CDMA (code division multiple access) is a mobile digital radio technology that transmits streams of bits and whose channels are divided using codes (PN sequences). CDMA permits many radios to share the same frequency channel. Unlike TDMA (time division multiple access), a different technique used in GSM and D-AMPS, all radios can be active all the time, because network capacity does not directly limit the number of active radios. Since larger numbers of phones can be served by smaller numbers of cell sites, CDMA-based standards have a significant economic advantage over TDMA-based standards, or the oldest cellular standards that used frequency division multiple access (FDMA).
CDMA2000 has a relatively long technical history, and remains compatible with the older CDMA telephony methods (such as cdmaOne) first developed by Qualcomm, a commercial company, and holder of several key international patents on the technology.
The CDMA2000 standards CDMA2000 1xRTT, CDMA2000 EV-DO, and CDMA2000 EV-DV are approved radio interfaces for the ITU's IMT-2000 standard and a direct successor to 2G CDMA, IS-95 (cdmaOne). CDMA2000 is standardized by 3GPP2.
CDMA2000 is a registered trademark of the Telecommunications Industry Association (TIA-USA) in the United States, not a generic term like CDMA. (This is similar to how TIA has branded their 2G CDMA standard, IS-95, as cdmaOne.)
CDMA2000 is an incompatible competitor of the other major 3G standard UMTS. It is defined to operate at 400 MHz, 800 MHz, 900 MHz, 1700 MHz, 1800 MHz, 1900 MHz, and 2100 MHz.
Cell Phone
Cellular Phone
Cell Site
Cell site is a site where antennas and electronic communications equipment are placed to create a cell in a cellular network for the use of mobile phones.
A cell site is composed of a tower or other elevated structure for mounting antennas, and one or more sets of transmitter/receivers transceivers, digital signal processors, control electronics, a GPS receiver for timing (for CDMA2000 or IS-95 systems), regular and backup electrical power sources, and sheltering.
Cellphone
Cellular Phone
Cellular Frequencies
Cellular frequencies are the frequencies utilized by cellular networks to provide service to their subscribers.
Due to historical reasons, radio frequencies used for cellular networks differ in the Americas, Europe, and Asia. The first commercial standard for mobile connection in the United States was AMPS, which was in the 800 MHz frequency band. In Europe, the first wide-spread automatic mobile network was based on the NMT-450 standard, which was in the 450 MHz band. As mobile phones became more popular and affordable, mobile providers encountered the problem when they could not provide service to more and more customers. They had to develop their existing networks and eventually to introduce new standards, often based on other frequencies. The GSM standard, which appeared in Europe to replace NMT-450 and other standards, initially used the 900 MHz band. As demand grew, carriers acquired licenses in the 1800 MHz band. (Generally speaking, lower frequencies allow carriers to provide coverage for a larger area, while higher frequencies allow carriers to provide service to more customers in a given area.)
In the U.S., the analog AMPS standard that used the Cellular band (800 MHz) was replaced by a number of digital systems. Initially, systems based upon the AMPS mobile phone model were popular, including IS-95 (often known as "CDMA", the air interface technology it uses) and IS-136 (often known as D-AMPS, Digital AMPS, or "TDMA", the air interface technology it uses.) Eventually, IS-136 on these frequencies was replaced by most operators with GSM. GSM had already been running for some time on US PCS (1900 MHz) frequencies.
And, some NMT-450 analog networks have been replaced with digital networks utilizing the same frequency. In Russia and some other countries, local carriers received licenses for 450 MHz frequency to provide CDMA mobile coverage.
Many GSM phones support three bands (900/1800/1900 MHz) or four bands (850/900/1800/1900 MHz), and are usually referred to as tri band and quad band phones, or world phones; with such a phone one can travel internationally and use the same handset. This portability is not as extensive with IS-95 phones, however, as IS-95 networks do not exist in Europe, Africa, and the Middle East.
Mobile networks based on different standards may use the same frequency range; for example, AMPS, D-AMPS, N-AMPS and IS-95 all use the 800 MHz frequency band. Moreover, one can find both AMPS and IS-95 networks in use on the same frequency in the same area that do not interfere with each other. This is achieved by the use of different channels to carry data. The actual frequency used by a particular phone can vary from place to place, depending on the settings of the carrier's base station.
Cellular Network
A cellular network is a radio network made up of a number of radio cells (or just cells) each served by a fixed transmitter, known as a cell site or base station.
These cells are used to cover different areas in order to provide radio coverage over a wider area than the area of one cell.
Cellular networks are inherently asymmetric with a set of fixed main transceivers each serving a cell and a set of distributed (generally, but not always, mobile) transceivers which provide services to the network's users.
Cellular One
Cellular One is the trade name of the cellular service offered by several mobile phone providers, most recently Dobson Cellular. It was originally the trade name of one of the first mobile telephone service providers. In 1977, the American Radio Telephone Service and Motorola formed Cellular One to offer service to the Baltimore/Washington D.C. area. In 1984, cellular service began in the Baltimore/DC area.
The Baltimore/DC service, and the rights to the name Cellular One, were sold from Metromedia to Southwestern Bell in 1987. In 1989, Southwestern Bell Mobile Systems and McCaw Communications formed a partnership called Cellular One Group. In 1992, Vanguard Cellular Systems joined the group. In 1995, Cellular One opened up membership in the partnership to all A-side providers. Under the U.S. AMPS allocation, A-side providers were independent wireless operators, while B-side providers were usually affiliates of the local landline telephone company. A new slogan was also developed, "Cellular One: Clear Across America", recognizing cellular's national reach, although there were very few national plans at this time. In 1995, Cellular One affiliates had over 5 million customers and affiliates' towers served approximately 69% of the U.S. population. [1] Also in 1995, SNET joined the partnership. Not all A-side carriers participated: most notably, L.A. Cellular, in the nation's second largest market, Los Angeles, never participated in Cellular One, and did not have agreements with Cellular One for some time. Many McCaw markets switched to the AT&T Wireless name when that was introduced, and McCaw dropped out of the partnership. Western Wireless joined the partnership in 1999.
When SBC Communications and BellSouth merged their wireless operations into Cingular Wireless, the Cellular One group name became the sole property of Western Wireless.
The Cellular One brand name was also used by Dobson Cellular on the US West Coast and in Alaska. In December 2005, Dobson purchased the rights to the Cellular One name from Alltel (which had purchased Western Wireless in August). However, their services were completely unrelated. Dobson uses a TDMA and GSM network; Western Wireless used a AMPS and CDMA network.
Cellular Telephones
Perhaps one of the most well known examples of wireless technology in action is the cellular telephone. These instruments use radio waves to enable the operator to make phone calls from many locations world-wide. They can be used anywhere that there is a cellular telephone site to house the equipment that is required to transmit and receive the signal that is used to transfer both voice and data to and from these instruments. (For more information see mobile phones).
Centennial Wireless
Centennial Wireless (NASDAQ: CYCL) is a regional wireless telecommunications provider that operates D-AMPS and GSM networks in the Midwest states of Michigan, Ohio and Indiana as well as the Southeastern states of Mississippi, Louisiana, and Texas. Centennial Wireless is a wholly owned subsidiary of Centennial Communications. Centennial also operates CDMA networks in in Puerto Rico and the Dominican Republic.
Charge Port
This is the hole that the charge plugs in to charge the battery.
Charger
This is the power source that plugs into the phone to charge the battery.
Cingular Wireless
Cingular Wireless LLC was founded in 2001 as a joint venture of SBC Communications (now AT&T, Inc.), and BellSouth (which AT&T Inc. acquired in 2006). The joint venture created the nation's second largest carrier. Cingular grew out of a conglomeration of 12 regional companies with Bell roots. The 12 companies included:
-Ameritech Mobile Communications, LLC*
-BellSouth Mobility, LLC*
-BellSouth Mobility DCS, Inc.
-BellSouth Wireless Data, LLC
-SBC Wireless, LLC
-SNET Mobility, LLC
-Southwestern Bell Mobile Systems, Inc.*
-Southwestern Bell Wireless, Inc.
-Pacific Bell Wireless, LLC
-Pacific Bell Wireless Northwest, LLC
Also included were some Cellular One markets, and Houston Cellular. Cingular's lineage can be traced back to Advanced Mobile Phone Service, Inc. (companies spun off from this denoted with a *), which was a subsidiary of AT&T created in 1978 to provide cellular service nationwide. AMPS, Inc. was divided among the RBOCs as part of the Bell System Divestiture.
With the exception of Pacific Bell and BellSouth Mobility DCS, the digital network consisted of D-AMPS technology. The Pacific Bell and BellSouth Mobility DCS networks used GSM technology on the PCS frequency band (1900 MHz).
Cingular Wireless is now at&t
AT&T Mobility LLC (usually branded "AT&T",[4] and formerly named Cingular Wireless LLC) is the wholly owned wireless subsidiary of AT&T Inc.[5] AT&T Mobility is the largest mobile phone company in the United States and the second largest in Puerto Rico. [6] AT&T Mobility currently has 62 million subscribers as of 2007, and operates the largest digital voice and data network in the United States.[7]
Formerly a joint venture between SBC Communications and BellSouth, Cingular Wireless soon acquired the old AT&T Wireless; SBC later acquired the original AT&T and rebranded as "the new AT&T". Cingular became wholly-owned by the new AT&T in December 2006 as a result of AT&T's acquisition of BellSouth.
The division is currently in the process of being rebranded to match its new parentage. Renaming on a corporate level occurred immediately, and consumer branding will change to "AT&T," or a variant thereof, by the end of 2007. Until all regulatory filings are approved, however, and public awareness is fostered, the "Cingular" brand will continue to be used in store signage and media advertisements during a dual-branded transition, expected to last several months. This process began January 15, 2007.[8]
Among the services that AT&T aggressively promotes is its "Rollover" service, allowing customers to keep unused minutes from month to month on a twelve-month rolling cycle on its popular "Nation" nationwide plans.
Contacts
Contacts also referred to as Phonebook is a database used for storing name and phone numbers. In cellphones each contact entry usually consists of a few standard fields (for example: Name, Mobile Number, Home Number, Work Number, E-mail address and Fax number). Most such systems store the details in alphabetical order of people's names, although in paper-based address books entries can easily end up out of order as the owner inserts details of more individuals or as people move.
Blog | Order Status | Help/Support | About Us | Contact Us
Search the Knowledgebase
Browse by Category