Eine nach einem asynchronen Transfermodus arbeitende Vermittlungseinrichtung sowie entsprechendes Steuerungsverfahren

摘要

It is provided an ATM switch of the present invention comprising: 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, it is possible to prevent interruptions in communications services by causing the data line paths to be preserved rather than released.