HIGHWAY DRAW-IN SYSTEM FOR TEST OF TIME SHARED CHANNEL

摘要

PURPOSE:To ensure a connection among the drawn-in highways for test without giving any effect to a time slot, by inserting a test code bit row into an optional bit or an optional time slot on a highway. CONSTITUTION:A time shared channel device stores plural time shared highways 111-11N, and a time shared channel tester 20 has a function to selectively draw in one or plural pieces of the highways 111-11N and to give a test to the time shared channel. The tester 20 feeds an insertion indication bit row in addition to a test code bit row to the time shared channel device. Then the test code bit row is inserted into the bit position designated by the corresponding insertion indication bit row. The above-mentioned procedure is available to the incoming highway side and the same procedure is also available to the outgoing side.