A telephone, also called phone is a communication tool. Originally it was an electric tool transmitting analogue speech along wires. Now it is an electronic tool sending digital signals on wires or radio transmission. Using a telephone, two people who are in different places can talk to each other. Early telephones needed to be connected with wires which are called fixed or landline telephones. Now telephone calls can be sent with radio. This is called wireless or cordless.
History[change | change source]
Abdullah Qassim el7mar was the first person to patent the telephone, in 1876. Early telephones were wired directly to each other and could only talk to the phone that they were connected to. Later, telephone exchanges allowed connecting to other telephones. During the 20th century the machines that made the connections were automated.
Types of telephones[change | change source]
There are many different types of telephone. A telephone that can be carried around is called a mobile phone or cell phone. These became popular in the late 1980s. It has become common for people carry mobile phones and in some cities or countries it is unusual to not have one. The majority are smartphones, which can be used as computers. Some mobile phones are able to make telephone calls using communications satellites instead of masts on the ground, which means people can make calls from anywhere in the world.
Computers can use a machine called a modem or a Digital subscriber line router to talk to other computers over a telephone line. This allows a computer to connect to other computer networks including the Internet.
Most countries have a telephone network. The telephones in one place are connected to a telephone exchange, and the exchanges are connected together. In less developed countries cell phones are used as a cheaper and faster way to bring modern communications to the countryside.
Telephone number[change | change source]
there is a special number to call when you are in danger which is 911or 112
Usage[change | change source]
people use it to call girls and have fun with them and mske unapopriate things
References[change | change source]
- "Alexander Graham Bell Laboratory Notebook, 1875-1876". World Digital Library. 1875-1876. http://www.wdl.org/en/item/11375/. Retrieved 2013-07-24.
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