Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...
Patent
1989-05-01
1991-02-26
Ng, Jin F.
Telephonic communications
Telephone line or system combined with diverse electrical...
Having transmission of a digital message signal over a...
379102, H04M 1100
Patent
active
049967061
ABSTRACT:
A method is disclosed for controlling the supply or electric power to a modem in a data communication interface circuit. A power supplying and blocking circuit is additionally combined with the interface. The power supplying and blocking circuit which is controlled by a controller supplies only the controller and a ring detector of a data access circuit with the electric power when the interface circuit is placed in a stand-by mode. The modem is supplied with power only when transmitting or receiving data.
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MacBride et al., "Remote Computer Power-On Via Switched Telephone Network", IBM Technical Disclosure Bulletin, vol. 25, No. 6, Nov. 1982, p. 3064.
Chan Wing F.
Ng Jin F.
Poff Clifford A.
Samsung Electronics Co,. Ltd.
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