Intelligent modem with manual escape switch

Details Intelligent modem with manual escape switch Intelligent modem with manual escape switch

1988-11-21

1990-05-22

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

049283057

ABSTRACT:
An improvement is made in an intelligent modem system which can operate selectively either in a transparent mode in which a modem circuit of the system is placed in a data communication relationship with an information processing terminal while the modem circuit is connected with a public communication line, or in an escape mode in which the modem circuit of the system is placed out of the data communication relationship from the information processing terminal to permit altering of the status of the modem circuit while the modem circuit is connected with a public communication line, by using a switch element for selectively placing the modem circuit of the system in a data communication relationship, with the information processing terminal, when a manual reception and/or transmission mode is selected, also for effecting a change-over between the transparent mode and the escape mode, when an automatic reception and/or transmission mode is selected.

REFERENCES:
patent: 4431867 (1984-02-01), Heatherington
patent: 4549302 (1985-10-01), Heatherington
patent: 4718082 (1988-01-01), Parker et al.

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