Method and apparatus for code matching the base and mobile unit

Details Method and apparatus for code matching the base and mobile unit Method and apparatus for code matching the base and mobile unit

1985-07-17

1988-12-27

Lev, Robert

Telephonic communications

Audio message storage, retrieval, or synthesis

H01Q 701

Patent

active

047946369

ABSTRACT:
A method and apparatus for code matching the base and mobile unit of a cordless telephone set. A new matching code is established by a microprocessor in the base unit each time the mobile unit is replaced thereon, and is stored in respective memories therein. Replacement of the mobile unit on the base unit is detected from the charging current which is then drawn by a rechargeable battery in the mobile unit from a power source connected to the base unit.

REFERENCES:
patent: 4332981 (1982-06-01), Palombi et al.
patent: 4535200 (1985-09-01), Himmebauer et al.
patent: 4560832 (1985-12-01), Bond et al.
patent: 4574163 (1986-03-01), Zato
patent: 4593155 (1986-06-01), Hawkins
patent: 4639549 (1987-01-01), Hirayama et al.

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