US PATENT SUBCLASS 370 / 438
.~ Using a separate control line or bus for access control

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

431  DF  CHANNEL ASSIGNMENT TECHNIQUES {12}
438.~ Using a separate control line or bus for access control {1}
439  DF  .~.~> Control line is used to request or reserve access {1}

DEFINITION

Classification: 370/438

Using a separate control line or bus for access control:

(under subclass 431) Subject matter wherein the assignment of a channel is controlled by a supervisory signal communicated on a line which is distinct from the line used for communicating information signals.