Chapter 9 Communications Circuits 9.4.8 Digital Subscriber Line SL A communication line technology that provides high-speed, asymmetric, dedicated point-to-point, public network access over twisted pair copper wire between a network service provider's central office and the customer' s site is called adsl www.gxmu.edu.cn9.4.8 Digital Subscriber Line (DSL) A communication line technology that provides high-speed, asymmetric, dedicated point-to-point, public network access over twisted pair copper wire between a network service provider's central office and the customer's site is called ADSL. www.gxmu.edu.cn Chapter 9 Communications Circuits