Patent ID: 7869490

Claim:
A repeater for regenerating signals communicated across a telecommunication line extending from a central office of a telecommunication network to a customer premises, comprising: a receiver coupled to a first telecommunication line segment of the telecommunication line, the first telecommunication line segment extending from the central office to the repeater, the receiver configured to receive a first data signal from the first telecommunication line segment, the receiver configured to demodulate the first data signal to recover digital data by using a constellation that provides a first constellation density, the first data signal having a spectral shape; and a transmitter coupled to the receiver and a second telecommunication line segment of the telecommunication line, the second telecommunication line segment bound within a cable, the transmitter configured to form a second data signal comprising the digital data by using a constellation that provides a second constellation density, the transmitter further configured to transmit the second data signal across the second telecommunication line segment, wherein the second constellation density is higher than the first constellation density, wherein the transmitter is configured to control a spectral shape of the second data signal such that the second data signal is spectrally compatible with signals transmitted along a third telecommunication line segment bound within the cable, and wherein the spectral shape of the second data signal is different than the spectral shape of the first data signal and is based on the second constellation density.