US PATENT SUBCLASS 379 / 333
CONCENTRATOR OR TRUNK SELECTOR

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


379 /   HD   TELEPHONIC COMMUNICATIONS

333CONCENTRATOR OR TRUNK SELECTOR {4}
334  DF  .~> Concentrator-distributor pair (e.g., line concentrator)
335  DF  .~> Using crossbar or crosspoint switching
336  DF  .~> With magnet, electromagnet, or relay
337  DF  .~> With busy-idle test (e.g., idle trunk finder)

DEFINITION

Classification: 379/333

CONCENTRATOR OR TRUNK SELECTOR:

(under the class definition) Subject matter for connecting a large number of subscriber lines to a smaller number of shared or trunk lines.

(1) Note. The subscriber lines are only connected alternatively to the shared or trunk lines; for simultaneous transmission see Class 370, Multiplex Communications.