Microcomputer applications in telephony

The application of microcomputers and other large-scale integrated (LSI) circuit products such as microcomputer memory peripherals, digital coders and decoders (codec), and channd filters to telephone switching systems, transmission systems, and to high-feature telephone instruments is discussed. Switching and transmission systems which use standardized digital transmission formats are described, and line circuit and common control functions are briefly discussed for digital switching system architectures using microcomputer control. A high-feature electronic telephone and trends in digital telephony are also reviewed as they relate to potential applications of products based on large scale integration techniques.