Communication system, communication apparatus, and control...

Details Communication system, communication apparatus, and control... Communication system, communication apparatus, and control...

2005-02-24

2008-03-18

Urban, Edward F. (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

With particular receiver circuit

C455S574000, C455S343600

Reexamination Certificate

active

07346329

ABSTRACT:
There is provided a communication system, communication apparatus, and control method. A first communication terminal includes message transmission means for transmitting a first or second message to a second communication terminal in response to an on/off operation for a power supply. The second communication terminal includes: first power supply control means for turning off a main power supply at reception of the first message; second power supply control means for turning on the main power supply at reception of the second message; mode setting means for setting communication means to a receive-only mode at reception of the first message, or setting the communication means to a mode capable of transmitting and receiving at reception of the second message; and sub-power supply providing means for providing a sub power supply for driving the second power supply control means during power-off of the main power supply of the second communication terminal.

REFERENCES:
patent: 6154663 (2000-11-01), Itamochi
patent: 6748228 (2004-06-01), Izaki et al.

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