Patent ID: 6047308
Filing Date: 2000-04-04
Classification: H04L,H04M

Abstract:
A method of processing signals between a telephone line and a host computer comprising:providing a line interface over which the signals can be transferred to and from the telephone line;providing a processor that generates address signals representing addresses and is coupled to receive the signals from the line interface;providing a selection module, operable by the processor between DSP and CP states thereof, that generates a selection-module output indicative of the selection module's current state;providing a memory that includes separate DSP and CP memory spaces comprising respective memory locations commonly specified by the addresses that the address signals represent, the memory being responsive to the selection-module output to accord the processor access exclusively to the memory locations that the memory signals specify in the DSP memory space when the selection-module output indicates that the selection module is in its DSP state and to accord the processor access exclusively to the memory locations that the memory signals specify in the CP memory space when the selection-module output indicates that the selection module is in its CP state; andwith the processor, operating the selection module alternately to its DSP-space and CP-space states and serially performing a set of digital signal processing (DSP) tasks associated with processing the signals while the selection module is in its DSP state and a set of control processing (CP) tasks associated with processing the signals while the selection module is in its CP state.