Data transmission network with independent frame phase

Details Data transmission network with independent frame phase Data transmission network with independent frame phase

1975-07-11

1976-10-19

Stewart, David L.

179 15BS, H04J 308

Patent

active

039872505

ABSTRACT:
A time division digital transmission system in which data are transmitted in the form of pulses grouped in multiplex words in time slots forming a recurrent frame. The invention relates more particularly to facilities in transmission line station for sampling from or introducing into the frame data words occupying certain time intervals in the frame. Each station comprises at least a multiplexer, a demultiplexer and a reception time base for restoring from the incoming frames and their framing words the time intervals and addresses of the said incoming frames, so that the component channels can be multiplexed and demultiplexed. Each station further comprises a local time base capable of producing local frames having framing words and the rhythm of which is controlled by the incoming signals, but which is able to oscillate freely in the absence of such signals. A buffer store is alternatively controlled by the received signals and by the local time base, whereby the phase of the outcoming signals is controlled by the latter time base.

REFERENCES:
patent: 3109897 (1963-11-01), Carbrey
patent: 3420956 (1969-01-01), Heightley
patent: 3725593 (1973-04-01), Palombari

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