| 摘要 |
PURPOSE:To confirm the operation of call connection continuously without manual intervention by providing an order distribution circuit, a caller telephone set and a telephone set for called party in a cell site. CONSTITUTION:When an operation confirmation instruction for call connection is applied from an operation panel 8 to a central controller 4, the central controller 4 instructs the start of operation confirmation for the call connection to a cell site 3. The start instruction is distributed by an order distribution circuit 9 and makes a call instruction to a caller telephone set 10 among telephone sets in the cell site 3. When the caller telephone set 10 makes a call, the calling of the caller telephone set 10 is informed to the central controller 4. Upon the detection of a call tone, the called party telephone set 11 informs the reply of the called party telephone set 11 to the central controller 4. The central controller 4 makes a call instruction to the cell site 3 after a prescribed time elapses. Thus, the operation confirmation of the call connection of the automobile telephone system is implemented continuously. |
