Patent
1977-12-05
1979-01-02
Robinson, Thomas A.
H04J 306
Patent
active
041328620
ABSTRACT:
A device for multiplexing n quasi-synchronous digital trains into one digital train at least n times faster, with a rate of Fs, comprises n channel elements for synchronizing together the quasi-synchronous trains by the addition of extra bits called "justification bits", and a multiplexing element for delivery, from the synchronized trains, the multiplex train (T) (rapid) formed by successive frames. According to the invention, the multiplexing element supplies to each channel element a signal SJ constituted by a pulse Fs
at each of the places except for the last place, provided in the train synchronized at the frame frequency of the multiplex train and by a pulse covering this latter location and maintained up to the beginning of the following frame and each channel element comprises means for ensuring, on differentiated edges of the signal SJ the insertion of justification indications, of value 1 or 0 according to whether there is or is not a request for justification in the synchronized train.
REFERENCES:
patent: 3569631 (1971-03-01), Johannes et al.
patent: 3742145 (1973-06-01), Clark et al.
patent: 4002844 (1977-01-01), Doussoux
patent: 4058683 (1977-11-01), Fenoglio
patent: 4072826 (1978-02-01), Aveneau
Doussoux Pierre
Ferret Francois
Le Nen Yvon
Compagnie Industrielle des Telecommunications Cit-Alcatel
Robinson Thomas A.
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