An embodiment of the invention provides a communication device (500, 800) which comprises a communication entity (502, 802) and a further communication entity (504, 804) communicatively coupled to the communication entity (502, 802) in accordance with a Digital Radio Frequency protocol. The communication entity (502, 802) comprises a protocol layer (516), the further communication entity (504, 804) comprises a protocol layer (514), and the protocol layers (516, 514) of the communication entity (502, 802) and of the further communication entity (504, 804) are connected via a protocol-physical interface (512, 513) which provides for a parallel bidirectional signal interfacing. The protocol-physical interface (512, 513) is adapted for selectively connecting the protocol layers (516, 514) directly or via physical layers (503, 508).