US PATENT SUBCLASS 370 / 504
.~.~.~ Reference indication consists of a gap

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

464  DF  COMMUNICATION TECHNIQUES FOR INFORMATION CARRIED IN PLURAL CHANNELS {9}
498  DF  .~ Combining or distributing information via time channels {17}
503  DF  .~.~ Synchronizing {6}
504.~.~.~ Reference indication consists of a gap

DEFINITION

Classification: 370/504

Reference indication consists of a gap:

(under subclass 503) Subject matter in which synchronization is achieved by identifying the absence of data transmission for a predetermined interval (i.e., a gap) and using that absence to identify a reference point within a transmission interval.