Patent ID: 7065205

Claim:
A system for attenuating leakage signals in a communication system, comprising: a multiple virtual line (MVL) transmitter configured to provide signals to a plurality of subscriber loops, each subscriber loop having a tip connection and a ring connection, the MVL transmitter having a first transmit output (Tx+) and a second transmit output (Tx−): an amplifier-based coupler coupled between the MVL transmitter and the plurality of subscriber loops, the amplifier-based coupler comprising: a first amplifier having an output at least coupled to each tip connection of in the plurality of subscriber loops and at least one input coupled to the Tx+ output of the MVL transmitter, and configured to have a nearly-zero impedance characteristic; and a second amplifier having an output at least coupled to each ring connection in the plurality of subscriber loops and at least one input coupled to the Tx− output of the MVL transmitter, and configured to have a nearly-zero impedance characteristic, such that at least one leakage signal originating on a first subscriber loop in said plurality of subscriber loops cannot propagate from subscriber loop to a second subscriber loop in said plurality of subscriber loops.