US PATENT SUBCLASS 370 / 456
.~.~.~.~.~ Idle or busy signal erasure or frame erasure

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

431  DF  CHANNEL ASSIGNMENT TECHNIQUES {12}
449  DF  .~ Polling {1}
450  DF  .~.~ Passing a signal identifying the idle or busy state of a channel (e.g., token passing) {2}
451  DF  .~.~.~ On bus {1}
452  DF  .~.~.~.~ On ring or loop {4}
456.~.~.~.~.~ Idle or busy signal erasure or frame erasure

DEFINITION

Classification: 370/456

Idle or busy signal erasure or frame erasure:

(under subclass 452) Subject matter involving the suppression or elimination of an idle or busy signal to ensure that a proper idle or busy signal is on the loop or ring.