Device for multiplexing N plesiochronous digital trains

Details Device for multiplexing N plesiochronous digital trains Device for multiplexing N plesiochronous digital trains

1975-03-19

1977-01-11

Stewart, David L.

H04J 306

Patent

active

040028445

ABSTRACT:
The invention comes within the field of multiplex digital transmissions. It concerns a device for multiplexing n digital plesiochronous trains into a more rapid digital train, comprising n channel elements for synchronizing together the plesiochronous trains by adding of extra bits called "justification bits" and a multiplexing element for sending out, from the synchronized trains, the rapid multiplex train. According to the invention, each of the channel elements comprises means for inserting, at a determined location place in the corresponding synchronized train, a justification request signal, the said multiplexing element comprising means for reading each of the n justification request signals and controlling the insertion in the multiplex train of justification indicator bits and means for giving, if required, to the corresponding channel element, the permission to effect a justification.

REFERENCES:
patent: 3093815 (1963-06-01), Karnaugh
patent: 3569631 (1971-03-01), Johannes
patent: 3749839 (1973-07-01), Fornasier
Note, Recensioni e Notizie; vol. XIX, No. 5, pp. 629-649; "Second Order Multiplexing of PCM Telephone Systems".

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