Patent ID: 7835516

Claim:
A direct access arrangement (DAA) device configured to interface a modem with a phone network, the DAA device comprising: a receive optical isolator (OI) module having a receive input side and a receive output side, the receive input side including a receive input line configured to receive a remote signal from the phone network, the receive output side including a receive output line configured to convey the remote signal to a modem; a first and second transmit OI modules each having a transmit input side and a transmit output side, the transmit input sides having transmit input lines joined in parallel with one another and configured to receive transmit signals from the modem, the transmit output sides having transmit output lines joined in parallel with one another and configured to convey the transmit signals to the phone network, wherein the receive OI module is interconnected with the first and second transmit OI modules such that distortion generated by the first and second transmit OI modules is at least partially canceled by the receive OI module; and an impedance matching module joined to the transmit output sides of the first and second transmit OI modules and configured to provide impedance matching with the phone network.