Patent ID: 7656955

Claim:
An apparatus for improvement of the transmission characteristics of a bundle of electrical data lines, in particular of a bundle of copper double wires, having an electronic circuit arranged between a first connection being used for connection to an external bundle of electrical data lines and a second connection being used for connection to data lines of a further external bundle of electrical data lines and/or to one or more external transmission appliances, the electronic circuit comprising at least one adaptive filter producing an output signal for correction of a received signal of a first data line of the external bundle of electrical data lines, a reference signal for said at least one adaptive filter being at least a signal which is tapped off from a second data line of the external bundle of electrical data lines and/or an external signal, and a fault signal for said at least one adaptive filter being the corrected received signal of the first data line of the external bundle of electrical data lines; wherein a bundle connects the first and second connections, of apparatus-internal connecting lines, with the apparatus-internal connecting lines having at least one connecting point, via which reference and/or fault signals can be tapped off and/or correction signals can be supplied.