Patents Represented by Attorney, Agent or Law Firm Katlen Muchin Zavis Rosenman
  • Asynchronous transmission mode switch and control method of the asynchronous transmission mode switch
    Patent number: 6400716
    Abstract: An ATM switch comprises a detector that detects impairments in signal lines, and a controller that controls the preservation of paths that have been established by call control via a signal line when an impairment has been detected on a signal line by the detector. When an impairment has occurred only on a signal line, interruptions in communications services are prevented by causing the data line paths to be preserved rather than released.
    Type: Grant
    Filed: October 13, 1998
    Date of Patent: June 4, 2002
    Assignee: Fujitsu Limited
    Inventors: Yuji Munakata, Sachito Shibata