Patent ID: 8514917

Claim:
A digital subscriber line ‘XDSL’ communication system for provisioning multitone modulated communications over two subscriber lines, and the communication system comprising: a first modem having shared and discrete components forming a transmit path coupled exclusively to an end of a first of the two subscriber lines and a receive path coupled exclusively to an end of a second of the two subscriber lines; and a second modem having shared and discrete components forming a transmit path and a receive path having couplings of transmit and receive path components to corresponding opposing ends of the two subscriber lines diametrically opposite to those of the first modem, whereby the first and second modems provision the first subscriber line exclusively for unidirectional communication from the first to the second modem, and provision the second subscriber line for unidirectional communication in the opposite direction, specifically from the second modem to the first modem, wherein the transmit path components of the first modem and the transmit path components of the second modem provision the first and the second of the two subscriber lines with multi-tone modulated communications across substantially identical and overlapping spectral ranges.