US PATENT SUBCLASS 714 / 714
.~ By tone signal

Current as of: June, 1999
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714 /   HD   ERROR DETECTION/CORRECTION AND FAULT DETECTION/RECOVERY

712  DF  TRANSMISSION FACILITY TESTING {4}
714.~ By tone signal

DEFINITION

Classification: 714/714

By tone signal:

(under subclass 712) Subject matter which includes application of a test signal composed of one or more tone signals.