When is a DSL filter relevant to a customer?

When is a DSL filter relevant to a customer?

• A. When they have satellite internet service
• B. When they have fiber optic service
• C. When they have DSL service
• D. When they have dial-up service

Answer: (C)

A DSL filter is used on a single telephone line that carries both voice calls and DSL internet, to keep the two signals from interfering with each other. The DSL signal uses higher frequencies than ordinary phone calls, so the filter splits the frequencies so the DSL modem can work without noise and telephones don’t pick up DSL noise. This matters only if the customer has DSL service on that line. If the customer uses fiber optic or satellite, there’s no DSL signal on the copper line, so a DSL filter isn’t needed. Dial-up also doesn’t involve a DSL signal, so a DSL filter isn’t relevant there. In short, a DSL filter is relevant whenever DSL service shares the same line with voice service.

A DSL filter is used on a single telephone line that carries both voice calls and DSL internet, to keep the two signals from interfering with each other. The DSL signal uses higher frequencies than ordinary phone calls, so the filter splits the frequencies so the DSL modem can work without noise and telephones don’t pick up DSL noise. This matters only if the customer has DSL service on that line. If the customer uses fiber optic or satellite, there’s no DSL signal on the copper line, so a DSL filter isn’t needed. Dial-up also doesn’t involve a DSL signal, so a DSL filter isn’t relevant there. In short, a DSL filter is relevant whenever DSL service shares the same line with voice service.