| 摘要 |
PCT No. PCT/JP96/01165 Sec. 371 Date Nov. 25, 1996 Sec. 102(e) Date Nov. 25, 1996 PCT Filed Apr. 26, 1996 PCT Pub. No. WO96/34497 PCT Pub. Date Oct. 31, 1996An automatic main distributing frame (MDF) apparatus for connecting and disconnecting an exchange and a user terminal includes a first-staged matrix board having a plurality of input/output lines, the input/output lines being disposed in a matrix pattern. The MDF apparatus also includes second-staged and third-staged matrix boards having a plurality of input/output lines, the input/output lines also being disposed in matrix patterns. The second-staged matrix board is disposed perpendicular to the first matrix board and the third-staged matrix board is disposed perpendicular to the second matrix board. A center board is disposed between the first-staged matrix board and the second-staged matrix board and between the second-staged matrix board and the third-staged matrix board. The center board, the first-staged matrix board, the second-staged matrix board, and the third-staged matrix board are mutually connected through connectors.
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