Caller's telephone number storage apparatus, a personal computer, and a caller's telephone number storage method, and a storage medium

摘要

In a caller telephone number storage system, when the polarity inversion detector 6 detects the polarity inversion of the line 7, the timer controller 12 starts measuring six seconds. When the short ringer detector 11 detects a short ringing from the line 7 supplied via the ring signal binary encoder 5, a short ringer detection signal is sent to the relay controller 14. When the relay controller 14 receives the short ringer detection signal, the timer controller 12 controls the line closure relay 13 within six seconds to dc close the line 7. Thereafter, the data receiver 15 sends the number display data to store it into the data storage means 16. At the same time, the data receiver 15 sends reception completion signal to the timer controller 12. Thus, the timer is cleared.