Cordless telephone capable of programming an ID code into both a base and cordless remote unit via the cordless remote unit
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United States of America Patent
Stats
-
Nov 26, 1991
Grant Date -
N/A
app pub date -
Dec 12, 1989
filing date -
Dec 12, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
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 makes it unnecessary to separately provide a memory element to store the abbreviated dialing numbers and dispenses with the backup batteries for the abbreviated dialing numbers memory. The number of component parts can also be reduced to allow the telephone set to be manufactured at a lower cost. Further, a cordless remote unit can be used to program itself, and a base unit, with identical ID codes to provide private access lines. Also, the base unit can either read or write the ID code from or to its memory, respectively, dependent upon the transmission sent from the remote unit.
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