What technology is required for a high-speed internet connection in a DSL setup?

A high-speed internet connection in a DSL (Digital Subscriber Line) setup specifically requires telephone lines. DSL operates by transmitting digital data over traditional copper telephone lines, which can carry both voice and broadband data simultaneously. This technology takes advantage of the frequency spectrum of the line, where voice communication uses lower frequencies and DSL uses higher frequencies, allowing for high-speed internet access without disrupting regular phone service.

The other options involve different technologies or infrastructures that do not apply to DSL. Satellite technology uses satellites for internet connections, which is a separate method. Cable infrastructure is associated with cable internet, using coaxial cables instead of telephone lines. Wireless signals pertain to wireless internet connections such as Wi-Fi or cellular data, which are not related to the DSL setup that relies specifically on telephone lines.