Automatic switching circuit

Details Automatic switching circuit Automatic switching circuit

1990-05-14

1993-03-16

Gaffin, Jeffrey A.

Electrical transmission or interconnection systems

Switching systems

307125, 307127, 307139, H01H 900

Patent

active

051947587

ABSTRACT:
Voltage sensing circuitry monitors the signal input lines of a standard RS232 serial data interface. The voltage levels at the inputs of the interface are compared to known voltages to determine if the correct interconnections have been made between the interfaced devices. If the interconnections are determined to be incorrect, a switching circuit is enabled to correct the faulty connections, and serial data transmission is thereafter initiated.

REFERENCES:
patent: 3624338 (1970-08-01), Ellis et al.
patent: 3626201 (1971-12-01), Chambers, Jr.
patent: 3648059 (1972-03-01), Beudry et al.
patent: 3731179 (1973-05-01), Rademaker
patent: 4532569 (1985-07-01), Salcedo

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