Method of establishing synchronism between teletypewriter transm

Details Method of establishing synchronism between teletypewriter transm Method of establishing synchronism between teletypewriter transm

1973-10-31

1976-09-28

Morrison, Malcolm A.

Telegraphy

Systems

Line-clearing and circuit maintenance

178 531R, 178 81, 325 42, 3401461D, H04L 704, H04B 310

Patent

active

039833259

ABSTRACT:
A method is described for establishing character frame synchronism between a teletypewriter transmitter and receiver wherein the direction of transmission is unidirectional. The transmitter sends character signals identifying characters of the alphabet or the like and operating condition signals corresponding to the operation condition of the transmitter. The operating condition signals are processed in a code converter which allocates code words to them permitting recognition of the character frame. The code words are transmitted to the receiver wherein a clock signal is derived by means of a character frame discriminator. The code words are reconverted in the receiver in order to cancel the code conversion which took place at the transmitter.

REFERENCES:
patent: 2956126 (1960-10-01), Jipp
patent: 3546592 (1970-12-01), Mayo
patent: 3562710 (1971-02-01), Halleck
patent: 3587043 (1971-06-01), Mengani
patent: 3651263 (1972-03-01), Lindback et al.
patent: 3702900 (1972-11-01), Sturzinger
patent: 3775688 (1973-11-01), Hinoshita et al.

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