Long line (telecommunications)
Template:Short description In telecommunications, a long line is a transmission line in a long-distance communications network such as carrier systems, microwave radio relay links, geosynchronous satellite links, underground cables, aerial cables and open wire, and submarine communications cables.<ref>Template:Citation</ref>
Microwave networks
In the United States, the term gain visibility through the establishment of AT&T Long Lines division of the Bell System in 1947 when a radio relay between New York and Boston that made up of seven radio relay stations was inaugurated.<ref>Template:Cite web</ref> The division was subsequently spun out as AT&T Long Distance with the breakup of AT&T in 1984.
Though supplanted by fiber-optic networks for long-distance communications, private microwave networks between key stock markets within United States and within Europe gained popularity among high-frequency traders after 2010 as it has significantly lower levels of latency compared with fiber networks.<ref>Template:Citation</ref><ref>Template:Cite web</ref>