Power-down modem

Details Power-down modem Power-down modem

1988-10-14

1990-08-21

George, Keith E.

Telephonic communications

Telephone line or system combined with diverse electrical...

Having transmission of a digital message signal over a...

375 8, H04M 1100

Patent

active

049513095

ABSTRACT:
A modem capable of three modes of operation; a normal mode, a reduced power mode responsive to a control signal from a function controller within the modem, and a further reduced power mode responsive to a control signal from the computer. The function controller monitors activity within the modem and applies or removes power transparently as required to exit or enter the first reduced power mode. The control signal from the computer enables the modem to enter or exit the further reduced power mode, in which no modem functions are available.

REFERENCES:
patent: 3549809 (1970-12-01), Stehr
patent: 4051326 (1977-09-01), Badagnani et al.
patent: 4415774 (1983-11-01), Driver
patent: 4647721 (1987-03-01), Busam et al.
patent: 4654869 (1987-03-01), Smith et al.
patent: 4656318 (1987-03-01), Noyes
patent: 4701946 (1987-10-01), Oliva et al.
patent: 4723269 (1988-02-01), Summerlin
patent: 4771417 (1988-09-01), Maxwell et al.
Macbride et al., "Remote Computer Power-On Via Switched Telephone Network", IBM Tech. Discl. Bull., vol. 25, No. 6, 11/82, p. 3056.

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