Modem powering method and apparatus

Details Modem powering method and apparatus Modem powering method and apparatus

1994-02-23

1996-02-13

Chin, Stephen

Pulse or digital communications

Transceivers

Modems

379 93, H04B 138

Patent

active

054917212

ABSTRACT:
A modem (106) is arranged with a power control circuit (113) for controlling the power flow to the modem, based on the modem's data activity. After initial data activity is established (303), the power control circuit monitors the modem to determine when the data activity ceases. When the power control circuit determines that modem activity is no longer present (305), it releases a power-control relay (114), thus powering-down the modem (307). The power control circuit then continues to monitor the modem to determine when data activity returns. When the power control circuit determines that modem activity has returned (309), it operates the power-control relay, thus powering-up the modem (311). Normal data activity now continues (313).

REFERENCES:
patent: 3745251 (1973-07-01), Fretwell
patent: 4701946 (1987-10-01), Olivia et al.
patent: 4951309 (1990-08-01), Gross et al.
patent: 4996706 (1991-02-01), Cho

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