A method of operating a microprocessor controlled telephone set having a microcomputer, user-data memory, and a plurality of function-keys, comprising the steps of: accessing said user data memory by defining a set of utility functions in a physical access module; translating a logical access request...http://www.google.de/patents/US5590189?utm_source=gb-gplus-sharePatent US5590189 - Method of operating a microprocessor controlled telephone set
