发明授权
- 专利标题： Maintenance communication control system in an ISDN service
- 专利标题（中）： ISDN业务中的维护通信控制系统
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申请号： US141582申请日： 1993-10-27
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公开(公告)号： US5375117A公开(公告)日： 1994-12-20
- 发明人: Sumie Morita , Takashi Hatano , Ryouzi Takano , Hisashi Koga , Tsutomu Shiomitsu
- 申请人： Sumie Morita , Takashi Hatano , Ryouzi Takano , Hisashi Koga , Tsutomu Shiomitsu
- 申请人地址： JPX Kawasaki
- 专利权人： Fujitsu Limited
- 当前专利权人： Fujitsu Limited
- 当前专利权人地址： JPX Kawasaki
- 优先权： JPX2-405244 19901221
- 主分类号： H04M3/24
- IPC分类号： H04M3/24 ; H04Q11/04 ; H04J3/12 ; H04J3/16
摘要：
A maintenance link is established according to a LAPD between first and second terminal units on a path through which subscribers' packet information is transmitted. In the first and second terminal units, first and second communication state control units are provided for controlling the consistency of the communication state between the two terminal units by sending/receiving communication state control information using the maintenance link.
公开/授权文献
- US4369580A Drafting pen accessory 公开/授权日：1983-01-25