An arrangement for full-duplex data transmission over a two-wire circuit (1) comprises a transmit channel (2) connected to a baseband data transmitter (6) and including a smearing filter (18), a receive channel (3) connected to a baseband data receiver (9) and including a complementary smearing filter...http://www.google.es/patents/US4835765?utm_source=gb-gplus-sharePatente US4835765 - Arrangement for full-duplex data transmission over two-wire circuits
Arrangement for full-duplex data transmission over two-wire circuits
