Answer:
RJ-11 connectors
Filters or splitters
Explanation:
RJ-11 (Registered Jack-11) is a four or six wire connection for telephone and modem connectors.
Filters prevent interference between the Residential Gateway and other analog devices connected to the phone line. A filter or splitter should be attached to each line connecting to a phone.
Therefore for configuring an ADSL connection, RJ-11 connectors and filters or splitters are needed.
