Connect a source with a 3.5mm Jack OUTPUT to a Bang & Olufsen Datalink INPUT. (7-pin DIN plug)
Examples of OUTPUT Sources: Headphone output from a TV, iPhone, Bluetooth receiver, Airport Express...
Examples of INPUT sockets on B&O Devices: TP, TP1, TP2, AUX, CD, ATAPE, ATAPE2, PHONO.