Method of synchronizing a pulse code modulation (PCM) junction a

Details Method of synchronizing a pulse code modulation (PCM) junction a Method of synchronizing a pulse code modulation (PCM) junction a

1976-06-15

1978-06-13

Murray, Richard

Telegraphy

Systems

Line-clearing and circuit maintenance

179 15BS, H04L 700

Patent

active

040950484

ABSTRACT:
The invention provides a method of synchronization of a junction in a pulse-code modulation (PCM) transmission network where any two multiplexing-demultiplexing stations equipped with independents clocks have to be brought into synchronism. For this purpose, the pulse trains (T.I.) of the PCM junction are alternatively recorded on two parallel channels A and B (registers RPA and RPB) and then memorized in a frame memory (MTR) by repeating the reading of the register when a risk of error is detected by comparison of the clocks. Means are provided for relocating the T.I. containing the multiframe locking code and the first frame of multiframe.

REFERENCES:
patent: 3928726 (1975-12-01), Colton
patent: 3928727 (1975-12-01), Roche
patent: 3989894 (1976-11-01), Charransol et al.
patent: 3992580 (1976-11-01), Bittel et al.

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