US PATENT SUBCLASS 370 / FOR 184
.~ Signalling (ancilliary to main information) (370/110.1)

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

FOR 135  DF  TIME DIVISION (370/77) {14}
FOR 184.~ Signalling (ancilliary to main information) (370/110.1) {4}
FOR 185  DF  .~.~> Digital tone signal generation (370/110.2)
FOR 186  DF  .~.~> Digital tone detection (370/110.3)
FOR 187  DF  .~.~> Superimposed or modulated on principal information (370/110.4)
FOR 188  DF  .~.~> Inserted in gaps in main information (370/111)

DEFINITION

Classification: 370/FOR.184

Signalling (ancillary to main information):

Foreign art collection including subject matter with means for transmitting and/or detecting signalling information ancillary to the principal information transmitted by the system (e.g., dial pulse, on-hook/off-hook, and ringing information all ancillary to the information conveyed by a telephone call).