Also known as line extender. A device that more or less doubles the maximum physical reach of a digital subscriber line (DSL) or ISDN service. A line doubler essentially is a repeater. See also HDSL, repeater, and xDSL.
"line doubler." YourDictionary, n.d. Web. 07 June 2018. <http://www.yourdictionary.com/line-doubler>.
line doubler. (n.d.). Retrieved June 07th, 2018, from http://www.yourdictionary.com/line-doubler