Patent ID: 7088818

Claim:
A telephony device connected to a telephone line which supports multiple different telephone signal protocols, comprising: a termination impedance circuit configured to provide an impedance associated with a frequency range of a DSL signal protocol, and an impedance associated with a frequency range of a POTS signal protocol, wherein the impedance associated with the frequency range of the POTS signal protocol is selectable to provide one of an off-hook impedance and an on-hook impedance in response to one of an off-hook condition and an on-hook condition associated with the POTS signal protocol, the termination impedance circuit providing at least one combined signal having DSL and POTS components; and an echo cancel circuit coupled to the termination impedance circuit to receive the combined signal, the echo cancel circuit adapted to provide an adjustment to the at least one combined signal provided by the termination impedance circuit, the echo cancel circuit having a select signal to select the adjustment from a plurality of adjustments.