US PATENT SUBCLASS 370 / 522
.~.~ Signaling (ancillary to main information)

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}
522.~.~ Signaling (ancillary to main information) {6}
523  DF  .~.~.~> Using bit robbing
524  DF  .~.~.~> Using a dedicated signaling channel (i.e., D-channel)
525  DF  .~.~.~> Digital tone signal generation
526  DF  .~.~.~> Digital tone detection
527  DF  .~.~.~> Superimposed or modulated on principal information
528  DF  .~.~.~> Inserted in gaps in main information

DEFINITION

Classification: 370/522

Signaling (ancillary to main information):

(under subclass 498) Subject matter having means for transmitting or detecting signaling information ancillary to the principal information transmitted by the system (e.g., dial pulse, onhook/offhook, and ringing information all ancillary to the information conveyed by a telephone call).

SEE OR SEARCH THIS CLASS, SUBCLASS:

496, for signaling in multiplex communications over frequency channels.