Circuit pack for internal line test connection of all electronic exchanger system

摘要

The present invention relates to a test connection circuit pack for connecting an internal line test bus of a full electronic exchanger system with a measurement module, and more particularly, to a test connection circuit pack in which a shelf influences a shelf in a subscriber internal line test, And to select only a pair of internal test buses in order to prevent degradation.;The circuit pack for test connection according to the present invention includes a data receiving unit 10 for receiving the 8-bit parallel data D0-D7 selected from the subscriber and the relay line test matching board, and the board selection data D5 and D6, (D0-D3) from the data receiving unit 10 to select an output from the comparator 30. The comparator 30 compares the lower 4-bit data D0-A first decoder circuit 16A and a second decoder circuit 16B and a buffer / driver 40 for receiving a strobe signal RDY and outputting a strobe signal; (50A-50D, 50A'-50D ') operated in accordance with a strobe signal, and a plurality of relays connected in plural for each driver and driven by the driver, city It allows to connect the bus and the measurement module.