Patent ID: 8132027

Claim:
Apparatus comprising: a first physical layer interface device adapted to interface between a communication device and a cable further adapted to interface with a second physical layer interface device, wherein: the first physical layer interface device is adapted to receive incoming data from the cable, transform the incoming data, and transmit the transformed incoming data to the communication device; the first physical layer interface device is adapted to receive outgoing data from the communication device, transform the outgoing data, and transmit the transformed outgoing data to the cable; and the cable comprises one or more wire pairs, wherein each wire pair has a first wire and a second wire; a cable interface adapted to connect between the first physical layer interface device and the cable, the cable interface comprising one or more DC signal devices, each having first and second inputs and an output, wherein: the first and second wires of at least one wire pair are connected to the first and second inputs, respectively, of a corresponding DC signal device; and each DC signal device is adapted to extract or inject a DC component of a signal on the corresponding wire pair; and at least one capacitor located in a signal path between the cable and the communication device, wherein: the at least one capacitor is located between the first physical layer interface device and the communication device; and the signal path between the cable and the communication device is transformerless.