Malfunction detection and changeover apparatus for data communic

Details Malfunction detection and changeover apparatus for data communic Malfunction detection and changeover apparatus for data communic

1974-10-29

1976-06-08

Claffy, Kathleen H.

H04M 1104

Patent

active

039625460

ABSTRACT:
A data terminal is connected to a telephone line for data transmission and reception. When a malfunction is detected in the data terminal, the data terminal is automatically disconnected from the telephone line and a telephone set connected to the telephone line. After a predetermined time interval, the telephone set is automatically disconnected from the telephone line and the data terminal re-connected to the telephone line.

REFERENCES:
patent: 2828362 (1958-03-01), Darwin et al.
patent: 3475557 (1969-10-01), Morse et al.
patent: 3524935 (1970-08-01), Gonsewski
patent: 3739338 (1973-06-01), Jacobson et al.
patent: 3787623 (1974-01-01), Stephenson

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