公开(公告)号：US4383137A

公开(公告)日：1983-05-10

申请号：US162568

申请日：1980-06-24

申请人： Chuta Aikawa ,  Noriyoshi Sanada ,  Mitsuyoshi Murakami ,  Junzo Kikuchi ,  Masaki Kuroda

发明人： Chuta Aikawa ,  Noriyoshi Sanada ,  Mitsuyoshi Murakami ,  Junzo Kikuchi ,  Masaki Kuroda

IPC分类号： H04Q3/58 ,  H04M1/72 ,  H04M3/38 ,  H04M9/00 ,  H04Q5/20 ,  H04M1/27 ,  H04Q3/54

CPC分类号： H04M9/007

摘要： A key telephone exchange system comprises office line units connected to office lines, terminal units respectively connected to key telephone sets and a main control unit for changing connections between respective office line units and respective terminal units. Each office line unit comprises a first memory device to store data transmitted between the office line unit and an office line, and a first processor for writing and reading data into and out of the first memory device for controlling origination and call requests to and from the office line. Each terminal unit comprises a second memory device adapted to store data transmitted between a terminal unit and a key telephone set, and a second processor for writing and reading data into and out of the second memory device for controlling transmission of data between a terminal unit and a corresponding key telephone set. The main control unit comprises a third memory device for storing states of use of the terminal unit and of the office line unit, and a third processor which sequentially scans data in the first and second memory devices of the terminal unit and of the office line unit and for exchanging connections between the terminal units and the office line units according to data obtained as a result of the scanning.

摘要翻译： 主要电话交换系统包括连接到办公室线路的办公室单元，分别连接到键盘电话机的终端单元和用于改变各个办公室线路单元与各个终端单元之间的连接的主控制单元。 每个办公线路单元包括用于存储在办公室线路单元和办公室线路之间传输的数据的第一存储器设备和用于将数据写入和读出到第一存储器设备中以用于控制来自和来自第一存储器设备的发起和呼叫请求的第一处理器 办公线 每个终端单元包括适于存储在终端单元和密钥电话机之间传输的数据的第二存储器件，以及用于将数据写入和读出第二存储器件的第二处理器，用于控制终端单元和 相应的钥匙电话机。 主控制单元包括用于存储终端单元和办公室单元的使用状态的第三存储装置，以及顺序地扫描终端单元和办公室单元的第一和第二存储装置中的数据的第三处理器 并且根据作为扫描结果获得的数据来交换终端单元和办公室线路单元之间的连接。