A:AnswerThank you for your question. You may follow the instructions from the link below in order to turn it off: http://help.panasonic.ca/viewing/ALL/KX-TGD510/OI/TGD510_PNQX8349ZA/TGD510_PNQX8349ZA.pdf#page=10
A:AnswerYou can temporarily turn off the ringer: Please refer to the link below for a more detailed answer: http://help.panasonic.ca/viewing/ALL/KX-TGD510/OI/TGD510_PNQX8349YA/TGD432_PNQX8349YA.pdf#page=10
A:AnswerThe main base unit for the KXTGD530 would require the telephone line and the power cord to connect into it and the wall. The small handset base units would only need the power cable to be connected into the wall as the handsets would need to be registered to the main base unit to communicate with it.