A communication controller (131; 132) for controlling communications between at least one communication unit (111; 112) of an access node (101; 102) and a plurality of remote communication units (211; 212) coupled to the at least one communication unit via at least one wired transmission medium (20; 40), wherein the communication controller is adapted to configure the at least one communication unit and the plurality of remote communication units to operate in full-duplex mode according to a first full-duplex communication profile when using a first subset of contiguous Discrete Multi-Tone DMT symbols (TSSET1) in a transmission frame, and according to a second full-duplex communication profile when using a second non-overlapping subset of contiguous DMT symbols (TSSET2) in the transmission frame, wherein the first full-duplex communication profile includes first downstream and upstream transmit power profiles (PSDDS1, PSDUS1) to achieve first non-zero aggregate downstream and upstream data rates (DSMAX1, USMIN1; DSMAX2, USMIN2) over the at least one transmission medium, and the second full-duplex communication profile includes second downstream and upstream transmit power profiles (PSDDS2, PSDUS2) to achieve second non-zero aggregate downstream and upstream data rates (USMAX1, DSMIN1; USMAX2, DSMIN2) over the at least one transmission medium distinct from the respective first aggregate downstream and upstream data rates, wherein the first downstream and upstream transmit power profiles give precedence to downstream communications, and the second downstream and upstream transmit power profiles give precedence to upstream communications, and wherein the communication controller is further adapted to determine at least one of the first and second downstream and upstream transmit power profiles by means of a multi-user optimization algorithm. wherein the communication controller is adapted to configure the at least one communication unit and the plurality of remote communication units to operate in full-duplex mode according to a first full-duplex communication profile when using a first subset of contiguous Discrete Multi-Tone DMT symbols (TSSET1) in a transmission frame, and according to a second full-duplex communication profile when using a second non-overlapping subset of contiguous DMT symbols (TSSET2) in the transmission frame, wherein the first full-duplex communication profile includes first downstream and upstream transmit power profiles (PSDDS1, PSDUS1) to achieve first non-zero aggregate downstream and upstream data rates (DSMAX1, USMIN1; DSMAX2, USMIN2) over the at least one transmission medium, and the second full-duplex communication profile includes second downstream and upstream transmit power profiles (PSDDS2, PSDUS2) to achieve second non-zero aggregate downstream and upstream data rates (USMAX1, DSMIN1; USMAX2, DSMIN2) over the at least one transmission medium distinct from the respective first aggregate downstream and upstream data rates, wherein the first downstream and upstream transmit power profiles give precedence to downstream communications, and the second downstream and upstream transmit power profiles give precedence to upstream communications, and wherein the communication controller is further adapted to determine at least one of the first and second downstream and upstream transmit power profiles by means of a multi-user optimization algorithm.