发明授权
- 专利标题： Network system diagnosis system
- 专利标题（中）： 网络系统诊断系统
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申请号： US104530申请日： 1987-10-01
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公开(公告)号： US4777330A公开(公告)日： 1988-10-11
- 发明人: Susumu Nakayashiki , Takeshi Harakawa , Yoshinori Bekki , Hiroyuki Wada , Masahiro Fuse , Hiroshi Nakase , Osamu Ebina , Jiro Kashio
- 申请人： Susumu Nakayashiki , Takeshi Harakawa , Yoshinori Bekki , Hiroyuki Wada , Masahiro Fuse , Hiroshi Nakase , Osamu Ebina , Jiro Kashio
- 申请人地址： JPX Tokyo
- 专利权人： Hitachi, Ltd.
- 当前专利权人： Hitachi, Ltd.
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX60-26237 19850215; JPX60-26238 19850215; JPX60-48647 19850312; JPX60-76570 19850412
- 主分类号： H04L12/437
- IPC分类号： H04L12/437 ; H04B3/46
摘要：
A station diagnosis method in a communications network system including a closed ring transmission line and a plurality of data stations which can be connected to the ring transmission line by a plurality of line concentrators disposed in the ring transmission line wherein an internal ring transmission line is formed in the line concentrators so that the operation states of the line concentrators are diagnosed by transmitting diagnosis data through the internal ring transmission line.
公开/授权文献
- USD426666S Floor lamp 公开/授权日：2000-06-13
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