Patent ID: 8155283

Claim:
An apparatus for facilitating wideband audio communication and digital subscriber line data communication over a twisted pair connection comprising: first and second input terminals configured to be coupled to a line conditioning coil via a first twisted pair connection, the line conditioning coil including a frequency response having a first passband extending over a portion of a narrowband voice frequency range, a second passband extending over a portion of a digital subscriber line frequency range, and a frequency notch having a frequency range between the first passband and the second passband, the frequency notch attenuating signals over a portion of a wideband audio frequency range; first and second output terminals configured to be coupled to a wideband audio telephony device via a second twisted pair connection, the wideband audio telephony device configured to transmit and receive audio within the wideband audio frequency range; and a wideband filter coupled between the first and second input terminals and the first and second output terminals, the wideband filter having a cut-off frequency below the frequency notch and having a passband extending over at least a portion of the frequency notch, the wideband filter configured to amplify signals within the frequency range of the frequency notch to compensate for the attenuation caused by the frequency notch.