US PATENT SUBCLASS 370 / 357
.~ Through a circuit switch

Current as of: June, 1999
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370 /   HD   MULTIPLEX COMMUNICATIONS

351  DF  PATHFINDING OR ROUTING {5}
357.~ Through a circuit switch {4}
358  DF  .~.~> Switching input signals having different aggregate bit rates
359  DF  .~.~> Input or output circuit, per se (i.e., line interface)
360  DF  .~.~> Switching control {8}
386  DF  .~.~> Particular switching network arrangement {2}

DEFINITION

Classification: 370/357

Through a circuit switch:

(under subclass 351) Subject matter wherein the switching network establishes a path or channel between two or more terminals and permits the exclusive use of the connection between them until the connection is released.

(1) Note. A switching exchange or a concentrator with multiplex signals are placed in ths subclass.

(2) Note. The distinction between multiplexing and selective or telemetry devices is: in multiplexing, the information is unrestricted as to content, e.g., a teletypewriter which uses an alphabet to transmit unlimited information, whereas in selective or telemetry devices, the information is restricted as to content, e.g., a transducer measuring a single parameter.

SEE OR SEARCH CLASS

200, Electricity: Circuit Makers and Breakers,

175+, for an automatic multiple contact selective switch.

307, Electrical Transmission or Interconnection Systems,

112+, for class appropriate switching system. 327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,

365+, for a miscellaneous gating circuit.

335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,

108+, for an electromagnetically operated automatic selective switch.

340, Communications: Electrical,

825.79+, for a nonmultiplex selective matrix system.

379, Telephonic Communications, appropriate subclasses relating to a telephonic device, particularly

290, for multiplexed switches and subclasses 242+ for a switch having nonmultiplexed signals to be switched, and subclass 333 for a concentrator.