Embodiments provide single fiber bidirectional HDCP modules. The parallel unit is formed of a plurality of aging devices connected in parallel and configured to be turned on or off for a predetermined time after storing electric charges. The module also comprises filters for filtering the communication signals in corresponding frequency band, and means for providing cross-band isolation. In the second path the audio signal is sequentially bandpass filtered, weighted with a correction factor, amplified, limited to a predetermined value, and bandpass filtered, where the correction factor is reduced when the predetermined value is exceeded. The fascia may include replaceable bezels with apertures therein for providing access to hardware devices. The body region is doped with charge carriers of a first type, the source region is disposed in the body region and doped with charge carriers of a second type, and the drain region is disposed in the body region and doped with charge carriers of the second type.