A:Answer Hello! No, you do not need individual phone jacks, as the handsets can be registered to the main base unit. For the base unit, you need to connect the AC adaptor to the unit by pressing the plug firmly, then fasten the cord by hooking it and connect the AC adaptor to the power outlet. Then, connect the telephone line cord to the unit, then to the single-line telephone jack (RJ11C) until you hear a click. A DSL/ADSL filter (not supplied) is required if you have a DSL/ADSL service. -C