US PATENT SUBCLASS 379 / 12
.~.~ With dedicated testing line or trunk

Current as of: June, 1999
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379 /   HD   TELEPHONIC COMMUNICATIONS

1  DF  DIAGNOSTIC TESTING, MALFUNCTION INDICATION, OR ELECTRICAL CONDITION MEASUREMENT {12}
9  DF  .~ Of centralized switching system {6}
12.~.~ With dedicated testing line or trunk

DEFINITION

Classification: 379/12

With dedicated testing line or trunk:

(under subclass 9) Subject matter including a line or trunk used exclusively for measurement or diagnostic testing.