Rate independent signalling means

Details Rate independent signalling means Rate independent signalling means

1974-12-20

1977-01-11

Griffin, Robert L.

Telegraphy

Systems

Alternating or pulsating current

325 30, 325 38A, 325 40, 325 44, 178DIG3, H04L 2700

Patent

active

040028330

ABSTRACT:
A method is disclosed wherein information can be conveyed serially over a signal path in a rate-independent fashion. Three or more signal states are employed for conveying information. The disclosed method consists of attaching meanings to changes of signalling state rather than the length of time that a state is maintained. It is only required that the data source and data sink establish meanings for each change of state and that each transmitted state be maintained long enough for the receiver to detect it.

REFERENCES:
patent: 3614620 (1971-10-01), David
patent: 3634855 (1972-01-01), Miller
patent: 3808366 (1974-04-01), Wanamaker et al.

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