Patent ID: 9553634
Date: 2017-01-24
CPC Classifications: H04B

Claim:
1. A device comprising: an echo cancellation circuit having a duplex port, a transmit port and a receive port; an electrical to optical (E/O) converter; an optical to electrical (O/E) converter; a transmit path for transmitting a Tx signal, the transmit path from the duplex port through the echo cancellation circuit to the transmit port and through the E/O converter, the Tx signal transmitted from the E/O converter as an optical Tx signal; a receive path for receiving an Rx signal, the receive path through the O/E converter to the receive port and through the echo cancellation circuit to the duplex port, the Rx signal received at the O/E converter as an optical Rx signal, the Tx signal and the Rx signal forming an electrical duplex signal at the duplex port; wherein the echo cancellation circuit cancels the Rx signal received at the receive port from the duplex signal to produce the Tx signal at the transmit port.