| 摘要 |
<p>Telephone numbers are read out in order from a telephone number list to be cleaned and a 'call set' message designating non-limited digital information as a transmitting ability is sent to a network by using the telephone numbers as call-in numbers. When a 'call' or 'response' is transferred from the network, 'disconnection' is sent out immediately to the network, a disconnection restoring sequence is executed, the telephone number is judged to be a valid number. When the call is not accepted and 'disconnection' is transferred from the network, a disconnection restoring sequence is immediately executed, and whether the telephone number is handled as a valid number or invalid number is judged in accordance with the content of the reason display from the network.</p> |
