Patent ID: 7031446

Claim:
A device that receives and processes signals from a telephone line and supports a plurality of telephone signal protocols, comprising: a converter circuit that digitizes input signals received on the telephone line, the converter circuit providing a digital signal having components associated with the plurality of telephone signal protocols; and a digital filter circuit, coupled to the converter circuit to receive the digital signal, the digital filter circuit adapted to convert a sample rate of the digital signal, the digital filter circuit comprising: a first sample rate converter to convert the sample rate of the digital signal in support of a first of the plurality of the telephone signal protocols to provide a first converted digital signal; and a second sample rate converter to convert the sample rate of the digital signal by an amount that is capable of being varied during the operation of the device in response to at least one control signal to provide a second converted digital signal having a variable sample rate, the second converted digital signal associated with a second of the plurality of telephone signal protocols.