| 摘要 |
PURPOSE:To obtain a small and economic dispatching telephone system by installing a command receiving device which has a means to call a command receiving telephone set corresponding to starting from a command device and a means which forms a channel between command telephone sets when the corresponding command receiving telephone set responds. CONSTITUTION:A dispatcher telephone 1 successively selects dail figures 1 to 9, a command device 3 successively selects signal lines 61 to 69, sends earthing to a command receiving and a respectively corresponding command receiving telephone set is caused to call. When command receiving telephone sets 2-0 to 2-9 during calling out respond, a ringing trip circuit 42 in respective command receiving devices 4-0 to 4-9 detects esponse, a A2 relay -43 and B2 relay not as shown are operated and a RTA relay is released. As the result, the command receiving telephone sets 2-0 to 2-9 are connected through a call line 5 to the dispatcher telephone 1. The dispatcher telephone 1 transfers a necessary command after response of respective command receiving telephone sets 2-0 to 2-9 is orally confirmed. |
