A method includes generating an output signal at a transmitter using an input signal. The method also includes providing the output signal for communication over a communication link. The method further includes identifying a return signal by at least partially removing from the output signal at least one of: the communicated signal and base line wander. In addition, the method includes establishing a synthesized impedance to the return signal.

 
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> Subscriber line interface circuitry with common base audio isolation stage

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