A draining apparatus including a base having first and second ends and a rack member having first and second ends, the first end of the rack member is rotatably attached to the first end of the base. The multiple conflict phases may avoid buffering or stalling conflict resolution, which may reduce system inefficiencies. The control station further includes a locking unit with an engagement element configured to engage the step part when the step part is in the operating position to secure the position of the step part, wherein the engagement element is pre-loaded for a movement into engagement with the step part. If dedicated parameters comprise a cell group index for the secondary cell, the wireless device assigns the secondary cell to one of the at least one secondary cell group identified by the cell group index.