The Central Controller in a Mobile Telephone Network
A cell phone, mobile phone or simply mobile phone, sometimes shortened to just cell or simply mobile phone, is an electronic device that is capable of making and receiving calls on a radio signal network while the user is traveling within a telecommunication service area while not being in a cell phone service zone. Cell phones often have the same basic features as other cell phones, including voice messaging capabilities and call waiting, but they also include additional features. These additional features are intended to give users added functionality, ease of use, and portability.
One of the most common features on a mobile phone is the presence of cellular system installed into the device. The cellular system is usually provided by the service provider of the cell phone company. The cellular system is designed to offer the basic functions necessary for communication, such as incoming and outgoing calls, messaging capabilities, and the location of the subscriber units. Some cellular systems may also include additional features, such as videoing the area where the user is located so that others can see where he is located. Some cellular systems allow the storage of data files on the cellular device, such as ring tones, phone book entries, and the like.
Another common feature found on some cell phones is the presence of a central controller unit. The central controller is sometimes part of a larger electronic circuit board or processor that is part of the overall cellular system. The central controller then controls all the other components of the cell phone by transmitting commands to the various elements via the electronic signal. Some devices may be capable of switching signals independently of the central controller, while others are dependent on the command from the central controller before sending a command to the various elements of the cellular system. Some cellular systems allow users to control their telephone calls by voice command through the central electronic unit. In this way, users can use a voice to command each function of the cell phone.