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Idaho State University

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Loop-Back
  • A method of performing transmission tests of access lines from the serving switching center, a method that usually does not require the assistance of personnel at the served terminal.
  • A method of testing between stations (not necessarily adjacent) wherein two lines are used, with the testing being done at one station and the two lines interconnected at the distant station. See also back-to-back connection, loop (def. #2), loop test.