| 摘要 |
PURPOSE:To prevent mis-connection of automatic calling, by collating and discriminating a push button dial signal with indication given to an automatic calling device from a processor in the sequential order, and transmitting a signal only when the coincidence of collation to all digits is obtained. CONSTITUTION:A push button dial signal receiver 5 receives and discriminates its push button dial signal at each digit, converts successively the signal to a logical code of each digit and transmits it to an analyzer ANL of an automatic calling device 8. Each digit of telephone number information transmitted from a processor 9 is collated with each digit of the logical code and the result is reported to the processor 9. When the collation to all digits is coincident, the processor 9 restores a relay T of a trunk device 4 and all digits after collation of a push button dial signal of the telephone number information are transmitted from an automatic calling device 8 to a telephone exchange network 2 through contacts t1, t2 and cmL1, cmL2 via the line 3. |
