The statistic shows the number of central office switches with 20,000 or more lines in the United States from 1990 to 2007. In 1997, there were 2,714 central office switches with 20,000 or more lines in the United States.
Total number of central office switches with 20,000 or more lines in the United States from 1996 to 2009
In the field of telecommunications, a telephone exchange or telephone switch is a system of electronic components that connects telephone calls. A central office is the physical building used to house inside plant equipment including telephone switches, which make telephone calls "work" in the sense of making connections and relaying the speech information. In a telecommunications network, a switch is a device that channels incoming data from any of multiple input ports to the specific output port that will take the data toward its intended destination. In the traditional circuit-switched telephone network, one or more switches are used to set up a dedicated though temporary connection or circuit for an exchange between two or more parties. On an Ethernet local area network (LAN), a switch determines from the physical device (Media Access Control or MAC) address in each incoming message frame which output port to forward it to and out of. In a wide area packet-switched network such as the Internet, a switch determines from the IP address in each packet which output port to use for the next part of its trip to the intended destination.
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Federal Communications Commission. (September 30, 2010). Total number of central office switches with 20,000 or more lines in the United States from 1996 to 2009 [Graph]. In Statista. Retrieved September 01, 2024, from https://www.statista.com/statistics/188724/number-of-central-office-switches-with-20-000-or-more-lines-in-the-us/
Federal Communications Commission. "Total number of central office switches with 20,000 or more lines in the United States from 1996 to 2009." Chart. September 30, 2010. Statista. Accessed September 01, 2024. https://www.statista.com/statistics/188724/number-of-central-office-switches-with-20-000-or-more-lines-in-the-us/
Federal Communications Commission. (2010). Total number of central office switches with 20,000 or more lines in the United States from 1996 to 2009. Statista. Statista Inc.. Accessed: September 01, 2024. https://www.statista.com/statistics/188724/number-of-central-office-switches-with-20-000-or-more-lines-in-the-us/
Federal Communications Commission. "Total Number of Central Office Switches with 20,000 or More Lines in The United States from 1996 to 2009." Statista, Statista Inc., 30 Sep 2010, https://www.statista.com/statistics/188724/number-of-central-office-switches-with-20-000-or-more-lines-in-the-us/
Federal Communications Commission, Total number of central office switches with 20,000 or more lines in the United States from 1996 to 2009 Statista, https://www.statista.com/statistics/188724/number-of-central-office-switches-with-20-000-or-more-lines-in-the-us/ (last visited September 01, 2024)
Total number of central office switches with 20,000 or more lines in the United States from 1996 to 2009 [Graph], Federal Communications Commission, September 30, 2010. [Online]. Available: https://www.statista.com/statistics/188724/number-of-central-office-switches-with-20-000-or-more-lines-in-the-us/