US PATENT SUBCLASS 370 / 434
.~.~ Concentrator

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

431  DF  CHANNEL ASSIGNMENT TECHNIQUES {12}
433  DF  .~ Only active channels transmitted {1}
434.~.~ Concentrator {1}
435  DF  .~.~.~> TASI (Time Assignment Speech Interpolation)

DEFINITION

Classification: 370/434

Concentrator:

(under subclass 433) Subject matter in which a switching device is used to reduce the number of transmission channels required to serve remote stations by allocating a transmission channel to a remote station only when the remote station requests service (e.g., by going off hook).