发明申请
US20090168771A1 TELEPHONE SYSTEM, AND TERMINAL DEVICE THEREOF, AND CONFIRMATION METHOD FOR THE DEVICE
审中-公开
电话系统及其终端设备，以及设备的确认方法
- 专利标题： TELEPHONE SYSTEM, AND TERMINAL DEVICE THEREOF, AND CONFIRMATION METHOD FOR THE DEVICE
- 专利标题（中）： 电话系统及其终端设备，以及设备的确认方法
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申请号： US12252740申请日： 2008-10-16
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公开(公告)号： US20090168771A1公开(公告)日： 2009-07-02
- 发明人: Shuji Yamazaki
- 申请人： Shuji Yamazaki
- 申请人地址： JP Tokyo
- 专利权人： KABUSHIKI KAISHA TOSHIBA
- 当前专利权人： KABUSHIKI KAISHA TOSHIBA
- 当前专利权人地址： JP Tokyo
- 优先权： JP2007-335285 20071226
- 主分类号： H04L12/28
- IPC分类号： H04L12/28 ; H04L12/66
摘要：
According to one embodiment, if the message makes a round in accordance with the order put to the IPTs in advance, the main unit recognizes that all the IPTs are connected to the LAN. If the end message comes back to the main unit for the start message transmitted from the main unit, all the IPTs are present on the LAN. The IPTs mutually perform the keep-alive processing among terminals in turn. In the process, if timeout occurs, the IPT which has detected the occurrence notifies the absence of the next IPT to the main unit, and change the order of the keep-alive processing.