JPS62242452A - Telephone set having mischievous call preventing function - Google Patents

Abstract

PURPOSE:To remove the termination of a mishievous call by receiving and discriminating the voice of a calling subscriber by a called subscriber's circuit and generating a call tone from a called subscriber's telephone set only to the termination from a suitable subscriber. CONSTITUTION:A terminating signal from a calling subscriber 14 arrives at a called subscriber's telephone set connecting terminal 9 from an exchange 11 through a telephone line 10. Consequently, a call signal receiving circuit 1 is driven, a circuit 2 for selecting a voice or a pulse signal is driven by an output of the circuit 1 and a DC loop of the telephone line is held to form the call waiting state of the calling subscriber. When a voice or a signal is generated from the calling subscriber, a signal storage circuit 3 collates whether the voice or the signal is the already registered signal or not, and only when the voice or signal is the registered signal, sends its output to a switching circuit 5. The circuit 5 informs the termination to the telephone circuit and the DC calling circuit loop is formed on the basis of a called subscriber's answer. Conse quently, the termination of a mishievous call can be removed.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is directed to a general ``rJL telephone subscriber line''. The only way to do this is by pressing a button or changing the subscriber's number, which leaves the subscriber in a sleepy state.The present invention is intended to eliminate even the above-mentioned good friends from receiving W stories. be.

[Kth way to solve the problem]

The present invention is based on the conventional fCo telephone, which sends out a ringing number at the called party's call number. It is designed so that it does not ring, and after the 1g circuit that receives the call signal of the called party operates (responses), it does not ring again.

The caller sends out his/her own voice, the called person's phone identifies the person who is injured, and the ring tone is output only when the caller receives a call from the appropriate party (multiple callers' voice recordings). Call number 1g from the station, receiving circuit, caller's voice or tr
The i1 signal receiver 1b circuit, the called party N signal ventilation sound circuit, the telephone communication circuit, etc. are F.

〔Example〕

Next, the operation of the embodiment according to the present invention will be illustrated and explained. Part 0 A is a circuit block diagram of the called party's telephone, which is the center of the present invention, and Part 1 is a circuit block diagram of the calling party's telephone including the exchange. In part A showing the block diagram of 1, when an incoming call signal from the calling party 14 is transferred to the called party's telephone connection terminal 9 through the exchange 11 and telephone line 1lJ10, first, the calling number 1d receiving circuit 1 is activated. , 2 circuits for selecting voice or pulse signals are activated in the receiver 1 by the output of the circuit, and the DC loop of the telephone circuit is maintained, thereby creating a waiting state for the caller.

If there is a caller's voice or information, No. 15 memory circuit 3
Then, it is checked whether the registered nfc<i number is reached, and only when the registered signal is satisfied, the output is switched to the switching circuit 5.
and put it into ftk operating state. Circuit 5 is
A full '41g notification is sent to the telephone line, and an FDC communication circuit loop is created for the called party to respond. Tsu Ps
, (i circuit 6. The transmitter 8 and the receiver 7 constitute the entire communication circuit of the called party, and the incoming signal sounding unit 4 rings and the % layer [- When the notification is made and the called party answers, the call can be made. It is something.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of a tamper-proof telephone according to the present invention. 1...Receiving circuit that detects all incoming calls from arbitrary callers; 2...Selection circuit that selects whether or not it is the caller;
3... Memory circuit that stores the caller's voice or signal in advance, 4... Incoming sound generation circuit that notifies the called party of the incoming call, 5... Telephone Switch circuit for switching the communication path of 6...i! 1'#1 circuit, 7
...Telephone receiver, 8...Telephone transmitter, 9...
...Telephone port # of the called party's telephone, 10...Connection terminal, 11...Telephone office exchange, 12...
・・Connection terminal 0 -<-:':/

Claims (1)

[Claims] In order to prevent a general subscriber's telephone from receiving unnecessary calls (prank calls) at night or when the user is away, the general subscriber's telephone circuit is equipped with a conventional telephone ringing signal receiving circuit (REC). a selection circuit that operates on the output of the circuit and maintains the DC loop of the telephone line and receives and selects the voice from the caller or a predetermined signal; a variable storage circuit that allows the voice or digital signal to be arbitrarily varied;
A switching circuit that operates with the output of the selection circuit and notifies the called party of an incoming call to the telephone line and forms a call loop, an incoming call sounding circuit that sounds the incoming call on the switching circuit, and the output of the switching circuit and the called party's response. A tamper-proof telephone that has a telephone circuit, a transmitter, and a receiver that form a telephone circuit.