| 摘要 |
<p>PURPOSE:To facilitate the check of connection of cell switches and a cell switch link network in which plural cell switches are connected in multi-stage, the test of the operating timing and the adjustment of phase. CONSTITUTION:A cell switch 1 consists of an input side conversion section 5 to which each input communication line L1 is connected, a buffer memory 7 storing a cell, an output side conversion section 15 to which each output communication line L0 is connected, a buffer control section 17 controlling write of a cell and read of a cell to/from the buffer memory 7, a pseudo cell generating circuit 19, a pseudo cell output control circuit 9 controlled by a pseudo cell generating control signal given from the outside of the cell switch, a clock output circuit 25 and a cell clock output circuit 27. Thus, the confirmation of the operation of the cell switch, the check of the connection between the cell switches in the cell switch link network, the test of the operating timing and the adjustment of phase are facilitated.</p> |
