| 摘要 |
PURPOSE:To surely make the set standby system effective by switching an active and a standby terminal station radio equipment periodically so as to supervise the state of the standby set. CONSTITUTION:A switching control section 7 of a line controller 6 counts number of times of speech connection every time speech connection between a terminal station and a control station is applied. Then every time the count reaches the preset number of times, a switch 5 is driven to switch the active and standby radio equipment mutually. In such a case, if the No.2 radio equipment 4 is failed, a switching control section 8 drives again the switch 5 to restore the active equipment to the No.1 radio equipment 3. Then a supervisory transmission section 7 sends fault generation supervisory information of the No.2 radio equipment 4. Then the control station side supervises the state of the standby radio equipment at the terminal station side. |
