How do I Wire a Friedland Doorbell? - ehow Friedland manufactures a number of different doorbells. Whether the signal is transmitted wirelessly or through electrical wiring, the wiring connections of Friedland doorbells are of the standard type. With some wiring equipment and the right technique, you can wire a Friedland doorbell in a few steps. Friedland Door Chimes Friedland’s Libra+ is a stylish state-of-the art range of wirefree chimes and pushes. It includes new functions to door chimes such as identification icons, analogue volume control and operates on the 868MHz FM frequency.