| 摘要 |
PURPOSE:To secure a simple and automatic call without troubling the telephone operator between the telephone sets of the caller and the called subscribers for the master and slave units each of the radio individual calling device. CONSTITUTION:Counter 6, which is connected to specific circuits 4a-4m of telephone exchange 1, counts the pulse signals for the call information numbers transmitted from outout trunk circuits 5a-5m, the answer information numbers, the call numbers of the slave units and the number of the telephone to whcih the caller desires the answer respectively. And then the signal corresponding to each number is delivered from counter 6. Furthermore, control circuit 8 is controlled by the output of circuit block 7 which gives a comparison to the output of counter 6, and the call information transmitted through circuit 8 is transmitted to transmission circuit 9. At the same time, the information given from circuit 8 is converted into the pulse signals through transmission circuit 11 to be transmitted to exchange 1. Then the output of incoming tracks 12a-12m of the called subscriber operated via the information from circuit 8 is connected electrically to the output of circuit 11 through call setting switch 14. Thus an automatic calling is ensured. |
