Computer interface for telephone services

摘要

Switchable telephone line circuits (2) input to a standard interface circuit (8) which provides system isolation and power. Analogue tone signals are then converted to digital signals (7) and passed to a digital signal processor (3).The processor operates on the digital signals, representing various services and passes them, via a flash EPROM (18) and parallel exchange processor (19) to a BUS (17). The BUS distributes the output to a number of parallel computer storage sections, a flash EPROM (12), EPROM memory (13), RAM (14) and to a decoder (15) for converting the processed signals to analogue form.