According to the invention, an E.sup.2 P-ROM, which is a non-volatile memory element capable of electrically reading and writing data as a memory element to store ID codes, is used and the remaining memory area of the non-volatile memory element is used to store abbreviated dialing numbers. This arrangement...http://www.google.de/patents/US5068889?utm_source=gb-gplus-sharePatent US5068889 - Cordless telephone capable of programming an ID code into both a base and cordless remote unit via the cordless remote unit
