Process for testing a data transmission system employing a test

Details Process for testing a data transmission system employing a test Process for testing a data transmission system employing a test

1978-10-02

1980-12-30

Atkinson, Charles E.

Excavating

H04L 1700

Patent

active

042427509

ABSTRACT:
A process for testing a data transmission system by which data are transmitted by way of two data transmission links and by way of a first transmission device and a second transmission device provides that a test loop is closed, in dependence upon a loop signal, and a transmission section is tested. Data are transmitted in data blocks and each block includes a status bit, a synchronizing bit and n data bits. The loop signal is formed from a given combination of the status bit and data bits, and at least one of the data bits is inverted before being returned to the second transmission device.

REFERENCES:
patent: 3622877 (1971-11-01), MacDavid et al.
patent: 3692964 (1972-09-01), Camiciottoli et al.
patent: 3739098 (1973-06-01), Camiciottoli et al.
patent: 3950622 (1976-04-01), Taylor
patent: 4064459 (1977-12-01), Markwitz et al.
patent: 4112414 (1978-09-01), Iscol et al.

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