Digital train processing device

Details Digital train processing device Digital train processing device

1976-10-14

1978-08-15

Stewart, David L.

179 15BS, H04J 312

Patent

active

041074688

ABSTRACT:
PCM telephone transmission apparatus and particularly the use of several ra binary positions in a multiplex frame. These positions are used in one or several units auxiliary to the main unit which processes PCM telephone signals. The auxiliary unit(s) include(s) a signalling time base identical to the signalling time base of the main unit. The counting signals for this auxiliary time base are at a lower rate than the counting signals of the main unit, but they are applied in such a way that a part of the auxiliary time base counts at the same rate as the corresponding part of the time base in the main unit. This structure enables an evolutive use of the extra bits without modification of the main unit.

REFERENCES:
patent: 3886317 (1975-05-01), Drapkin
patent: 3906159 (1975-09-01), Lutz
patent: 3909540 (1975-09-01), Maryscuk
patent: 3922493 (1975-11-01), Brenig

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