| 摘要 |
PURPOSE:To ensure a reception of a correct call signal exclusively without any erroneous selection, by storing previously the information indicating the presence or absence of writing for each call No. along with plural call Nos. and then carrying out a selective reception based on the information. CONSTITUTION:The information indicating the presence or absence of plural call Nos. as well as the presence or absence of writing for each call No. is stored previously in a call No. storing circuit 3. These stored call Nos. are received at a selective receiving circuit 1, and plural input call signals are selected. At the same time, the information on the presence or absence of writing from the circuit 3 is detected at a discrimination control circuit 4. In case the writing is already done, a gate 5 is opened to give a driving output to a ringing tone generating circuit 2. |
