| 摘要 |
PURPOSE:To easily and intentionally complete a call, by generating a pseudo signal in communicating, and sending it to an opposite side subscriber terminal via a line by a subscriber terminal connected to the line. CONSTITUTION:It is assumed that the user of a telephone set connected to a terminal TP desires to complete the call in communicating with a certain opponent. At this time, by depressing a key switch S by the user, a line delivery amplifier 6 is connected to a bell signal generation circuit 9 by an output switching control signal outputted from the output switching port 3d of a CPU3. Then, a pseudo bell signal issued from the bell signal generation circuit 9 is amplified by the line delivery amplifier 6, and is sent to the telephone set on an opposite side via the line. The opponent receiving the pseudo bell signal considers that the call is placed from another opponent to the user judging from a signal equivalent to the signal generated at the time of receiving the call by a catch phone. In other words, opportunity to complete the call can be generated by the false bell signal, then, the call is completed.
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