Cordless telephone system

Details Cordless telephone system Cordless telephone system

2011-05-24

2011-05-24

Doan, Phuoc (Department: 2617)

Multiplex communications

Communication over free space

Repeater

C455S426200

Reexamination Certificate

active

07948928

ABSTRACT:
Cordless telephones according to the DECT standard are constantly transmitting a so-called dummy barrier at a certain power level, repetition interval and transmit frequency to apply corrections to the synchronization counters in the portable parts for synchronization to the fixed part. According to the present invention, once timing of the portable part is synchronized to the fixed part, a wired connection is used for applying these small synchronization corrections with respect to the synchronization between the portable part and the fixed part of the DECT telephone system. Advantageously, an emission of electromagnetic energy is thereby reduced significantly.

REFERENCES:
patent: 6208116 (2001-03-01), Fischedick
patent: 6587694 (2003-07-01), Mooney et al.
patent: 6650088 (2003-11-01), Webb et al.
patent: WO0193459 (2001-12-01), None

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