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Landline

technology Maturity 11-13 Next article →

A landline is a telephone service that uses physical connections. It is also called a fixed line. This service uses cables or wires to carry sound. These wires can be metal conductors or optical fiber.

20251214 Uniden AS8401
20251214 Uniden AS8401

A landline is different from wireless mobile service. One helpful feature is that it allows many phones to work at once on one number. People sometimes call this plain old telephone service, or POTS. This system helps people stay connected to homes and offices.

How does the signal travel to your house? It starts at a central office, which is also called a wirecenter. From there, copper wires travel through different layers of cabling. These wires go through distribution points in an exchange area. Eventually, a single pair of wires reaches your home or office. This connection point is called a network interface, or NID.

How mobile phones are overtaking landlines in Africa
How mobile phones are overtaking landlines in Africa

Inside your building, wires go from the NID to your phones. Some landlines even carry high-speed internet through a system called DSL.

People have used these networks for a very long time. In 2003, the CIA World Factbook said there were 1.263 billion main telephone lines. China had the most with 350 million lines. The United States had 268 million lines. The United Kingdom had 23.7 million residential home telephones.

Fixed telephone lines per 100 inhabitants 1997-2007 ITU
Fixed telephone lines per 100 inhabitants 1997-2007 ITU

Today, many people are moving toward new ways of talking. Some countries like Estonia and the Netherlands have already retired their old networks.

Usage habits are changing quickly around the world. In Africa, mobile phone use grew much faster than landlines. Between 2000 and 2008, mobile use rose from 2 in 100 people to 33 in 100. In the United States, things are changing too. In 2004, only 45.9 percent of people aged 12 to 17 had cell phones. By 2008, about 77 percent of adults owned a mobile phone. In 2013, 91 percent of U.S. adults owned a mobile phone.

Modern technology offers new ways to use old numbers. This is called Voice over IP, or VoIP. VoIP uses an internet connection to make calls. This service allows you to keep your landline number without being tied to one place. You can use it on smartphones or computers. This makes it easier for people to work from home. It is a flexible way to stay in touch in a mobile world.

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File:20251214 Uniden AS8401.jpg
20251214 Uniden AS8401.jpg
File:Fixed telephone lines per 100 inhabitants 1997-2007 ITU.png
Fixed telephone lines per 100 inhabitants...
File:How mobile phones are overtaking landlines in Africa.jpg
How mobile phones are overtaking...
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