Telephone dialer system

Includes bibliographical references (page 97)This project presents the design concept and construct ion of a unique Telephone Dialer System. This design provides the user with voice feedback for system status, storage and retrieval of 119 telephone numbers up to 28 digits long, voice announcement of stored telephone numbers at a telephone booth or another telephone location, and automatic redial. The design is centered around a 6809 microprocessor and a Texas Instruments TMS 5220 speech synthesizer.\ud This project report discusses the basic concepts of design and presents functional and circuit descriptions in detail. Detail schematics and component data sheets are included in the appendixes.\ud The Telephone Dialer System has been built and its concepts tested