a method of optimally distributing signal power for multiple users over a xdsl or wireless channel considers uses computationally efficient tools to achieve improved crosstalk avoidance . the method chooses between eqpsd and fds signaling in a fashion that maximizes overall data rate . rather than choosing eqpsd signaling in regions where there is low self - next , but where the echo is high , the method selects fds signaling since the communication system acts in a manner similar to self - next in such regions .