Data transmission system

Details Data transmission system Data transmission system

1980-06-09

1982-09-21

Popek, Joseph A.

H04M 1100

Patent

active

043508480

ABSTRACT:
In a system for communicating data between two stations interconnected by way of a telephone line, a data transmission system wherein at least one of the stations includes a telephone set normally connected to said telephone line, a line changer, a data transmitter and a signal detector. When another station is called through the telephone set and a predetermined signal transmitted from said another station is detected by the signal detector, the line changer switches the telephone line from the telephone set to the data transmitter.

REFERENCES:
patent: 3553376 (1971-01-01), Bogaart
patent: 3962546 (1976-06-01), Hashimoto
patent: 4009342 (1977-02-01), Fahrenschon et al.

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