Question about Gigaset Box 100 int.

The Gigaset Box 100 is compatible with the Sunrise Fibre Box 3 (Connect Box 3) and can be connected directly to it. An analogue telephone connection cable (RJ11 cable) is required for the connection, as the Box 100 is a DECT base station with an analogue connection. The RJ11 cable is used to connect the Box 100 to the TEL port of the Sunrise Fibre Box 3. This means that the two devices are compatible and can be used together.