US PATENT SUBCLASS 379 / 334
.~ Concentrator-distributor pair (e.g., line concentrator)

Current as of: June, 1999
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379 /   HD   TELEPHONIC COMMUNICATIONS

333  DF  CONCENTRATOR OR TRUNK SELECTOR {4}
334.~ Concentrator-distributor pair (e.g., line concentrator)

DEFINITION

Classification: 379/334

Concentrator-distributor pair (e.g., line concentrator):

(under subclass 333) Subject matter having two similar complementary contractors to permit a large number of subscriber lines to be connected and supervised over a small number of trunk lines connecting the two complementary concentrators.