A combined line termination arrangement (1) for an access system supporting broadband transmission mode and narrowband transmission mode, the combined line termination arrangement (1) comprising a common interface device (4) having a common port (6) for receiving or transmitting a signal in said transmission modes and being connected to a first line card (2) and second line card (3). The common interface device further comprises a first switching means (10) for selectively closing and/or opening coupling paths to said first and second line cards and at least one bi-directional low pass filter (8) for and one bi-directional high pass filter (9) selective filtering the broadband and the narrowband signals to and from respective line terminations (LT1, LT2).