| 摘要 |
PURPOSE:To make random readout and multiple distribution to a low-speed calling side, by constituting a channel memory having a speed changing function which changes the switching speed between a subscriber side and network side at evey call and a holding memory in two stages at the down side. CONSTITUTION:A down switch connected with a down side highway is equipped with a channel memory (SMI) 4', writing in which is randomly controlled in accordance with a holding memory (HMI) 5' in response to a network side containing location TEN and another channel memory (SMII) 6, in which the content of the memory 4' is always copied in the connecting order JEN. A memory 6 makes random readout control by means of another holding memory (HMII) 7 independently provided from the memory 5' possible. Namely, random readout becomes possible when the address (JEN) of the memory 6 stored in the memory 7 which is read out to a subscriber side containing location is optionally changed, and, as a result, multiple distribution becomes possible. The up switch is made as in the case of conventional ones. |
