| 摘要 |
PURPOSE:To process a large number of lines with a small hardware, by providing a line scanning unit where double definition without fixing physical addresses on logical addresses and time division operations are possible. CONSTITUTION:Before transmission and receiving operatins, the CPU initializes physical addresses of the group of line adapters LA205. Physical addresses from the CPU which are set onto logical addresses of memories corresponding to lines in the line control part are led out by line scanning unit 204. Scanning unit 204 reads out logical addresses of memories corresponding to lines while selecting them successively even if many multiplex communication control units are connected, and unit 204 transfers physical addresses led out from them to LA205 in time division. |
