Telegraphy – Systems – Line-clearing and circuit maintenance
Patent
1976-09-30
1978-03-07
Richardson, Robert L.
Telegraphy
Systems
Line-clearing and circuit maintenance
179 15AW, 179 15BM, 179 15BS, 325 40, H04L 700
Patent
active
040781534
ABSTRACT:
The transmission system enables clock signals and auxiliary signals to be transmitted over a single channel, thereby avoiding the necessity of providing an independent auxiliary signal channel. This is accomplished by shifting in time the rising edges of the basic clock signal in the sending circuit as a function of the auxiliary signals to be transmitted, and then detecting this time-shift at the receiving circuit to recover the auxiliary signals. The clock signal is regenerated at the receiving circuit from the falling edges of the received clock signals.
REFERENCES:
patent: 2523279 (1950-09-01), Chatterjea et al.
patent: 2728817 (1955-12-01), Person et al.
patent: 3862363 (1975-01-01), Tanimoto
Hill Alfred C.
International Standard Electric Corporation
O'Halloran John T.
Richardson Robert L.
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