US Patent 7362857 Subscriber line interface circuitry transceiver

A subscriber line interface circuit apparatus includes a first driver for driving a downstream data signal in a non-voiceband range onto a subscriber line and a second driver for driving a downstream voice signal in a voiceband range onto the subscriber line. The apparatus includes receiver circuitry coupled to provide an upstream data signal and an upstream voice signal from an upstream signal carried by the subscriber line. The first driver and receiver circuitry reside on a same first integrated circuit die.