JPH04113757A - Malicious call detection system - Google Patents

Abstract

PURPOSE:To output only a relevant malicious call without being noticed of an opposite party by receiving a 1st hooking from a 1st subscriber when a 1st subscriber receiving an incoming call discriminates the call to be a malicious call, sending a non-voice to a 2nd subscriber being a talking opposite party, allowing the 2nd subscriber to receive a special number representing production of the malicious call, extracting, editing and outputting the subscriber number of the 2nd subscriber. CONSTITUTION:When a subscriber 9 discriminates an incoming call to be a malicious call during talking between the subscriber 9 and a subscriber of other station, the section 9 makes a 1st hooking. Then a register circuit 4 receives a special number dialed by the subscriber 9 via a link (d). Then a central controller 6 references a recorder 5 to recognize it that the special number received by the register circuit 4 is a number for detecting the malicious call Then the central controller 6 upon the detection of a 2nd hooking from the subscriber 9 restores a tone generating circuit 3a and the register circuit 4 to restore a link a2 in the reservation state to a state of a link a1 in the original connection state.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a malicious call detection method in a storage program controlled switching system.

[Conventional technology]

In the conventional malicious call detection method, in response to a report from a subscriber who is suffering from malicious calls or a request from a department whose main business is reception work where malicious calls are predicted, maintenance personnel of the switching equipment or information on the accommodation location of the relevant subscriber is collected. Enter subscriber information such as information in advance from a maintenance terminal connected to the exchange. When an incoming call to the relevant subscriber is detected, the telephone number of the relevant subscriber and the subscriber number of the caller at that time are output to the printer and the maintenance person is notified.

[Problem to be solved by the invention]

In the conventional malicious call detection method described above, after receiving a notification or request from a subscriber, the maintenance personnel enters the necessary data and starts the malicious call detection service, making it difficult to detect the first malicious call. Furthermore, there is a problem in that maintenance personnel must input data each time a subscriber makes a report. Furthermore, only the party on the call can determine whether a call is malicious, and in the conventional system, all incoming calls to the relevant subscriber are printed out, so maintenance staff alone cannot determine whether a call is malicious or normal. I couldn't make a decision.

SUMMARY OF THE INVENTION An object of the present invention is to provide a malicious call detection method that allows a maintenance person to output only the relevant malicious call without being noticed by the other party, without having to perform prior registration.

[Means to solve the problem]

The malicious call detection method of the present invention detects a first hooking from a first subscriber who has determined that a call in progress is a malicious call,
After closing the link for transmitting a dial tone to the first subscriber and transmitting the dial tone from the first tone generating means,
Receiving a special number for malicious call detection from the first subscriber by a receiving means, identifying it by a translation means, and transmitting silence to a second subscriber who is the other party of the call by a second tone generating means; If the second subscriber is housed in the same exchange as the first subscriber, edit and output the subscriber telephone number from the accommodation location information of the second subscriber, and If the subscriber or the first subscriber is accommodated in another station different from the one in which the subscriber is accommodated, the subscriber telephone number of the second subscriber received from the other station at the time of incoming call control; and edit and output the second file from the first subscriber.
The second subscriber is configured to detect soaking, override the second tone generating means and the receiving means, and reconnect the first subscriber and the second subscriber.

Embodiment J] Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an exchange system for explaining an embodiment of the present invention. In FIG. 1, the storage program controlled switching system includes a communication path switch 1, a trunk 2 connected to the communication path switch 1, and tone generation circuits 3a and 3b.
and a register circuit 4, a storage device 5, and a central control device 6.The central control device 6 is also connected to a printer 8 via a terminal training device 7. A subscriber (not shown) is connected via a trunk 2 to a called subscriber 9 by a link a1.

The operation will be explained below. In FIG. 2 (a), during a conversation between subscriber 9 and a subscriber of another station, subscriber 9 determines that the incoming call is a malicious call and performs the first hooking.Central control unit 6 detects this first hooking and puts link a1, which had been connecting subscriber 9 and trunk 2, into the reserved state indicated by link a2.In other words, the path is disconnected in terms of hardware, but The path is set in a reserved state in memory so that it cannot be used by others.Furthermore, the central control unit 6 sets the tone generation time F#l3a (
The tone generating circuit 3b (the first tone generating means) transmits a second tone for receiving the next information to the subscriber 9 via the link C, and also closes the link b. ) to transmit silence to the caller of another station via trunk 2. Then, link d, which receives this next information, is completed.

Next, in FIG. 2(b), register circuit 4 receives the special number dialed by subscriber 9 via link d. Then, the central control unit W6 refers to the storage device 5 and recognizes that the special number received by the register circuit 4 is a number for malicious call detection. Links b and a2 at this time
The state is the same as that described in FIG. 2(a). At the time of incoming call control, the central control unit 6 already receives the subscriber number of the caller using the common line signaling system, and stores it in the memory area of the storage device 5 corresponding to the subscriber 9.

The central control unit 6 reads this, edits it by adding a message number indicating the type of failure together with the subscriber number translated from the accommodation location information of the subscriber 9, and sends it to the ASC 11 or J
It is converted into an IS code and sent to the terminal control device 7.

Then, the terminal control device 7 outputs the transmitted coat amount to the printer 8.

Next, in FIG. 2(c), the central controller 6 receives a second F! from the subscriber 9! When a kink is detected, the tone generating circuit 3b and the register circuit 4 are restored, and the link a2 in the reserved state is returned to the state of the link a1 in the original connected state.

Therefore, the maintenance person can immediately know which subscriber is making a malicious call without the caller noticing.

In this example, the case is shown in which the subscriber who made the malicious call is accommodated in another station different from the station in which subscriber 9 is accommodated, or the subscriber is in the same exchange as subscriber 9. Even if the subscriber is accommodated, the subscriber number can be extracted from the accommodation location information of the subscriber who made the malicious call and output to the printer 8 by the same operation.

〔Effect of the invention〕

As explained above, in the present invention, when the first subscriber who receives an incoming call determines that the incoming call is a malicious call, the first subscriber receives the first security message from the first subscriber. , sends silence to the second subscriber with whom the call is being made, receives a special number indicating that the second subscriber is making a malicious call, and extracts the subscriber number of the second subscriber. Edited and outputted, the link between the first and second subscribers is reconnected by the first subscriber's second password, so the maintainer does not need to perform prior registration. It is possible to output only the relevant malicious call without the other party noticing.

[Brief explanation of drawings]

1 [21 is a configuration diagram of a switching system for explaining one embodiment of the present invention, and FIG. 2(a) is a state in which the first hooking from the called subscriber is detected during a call in FIG. FIG. 2(b) is a diagram showing a state in which a special number is received from the subscriber on the called side in FIG. 1 and the subscriber information on the calling side is output, and FIG. second from person
FIG. 3 is a diagram showing a state in which a hook is detected. 1... Call path switch, 2... Trunk, 3a3b
- tone generation circuit, 4...sister circuit, 5- storage device, 6-... central control unit, 7... terminal control unit,
8---Printer, 9---Subscriber.

Claims (1)

[Claims] The first call from the first subscriber who has determined that the ongoing call is a malicious call.
detects the hooking of the first subscriber, closes the link for transmitting a dial tone to the first subscriber, and after transmitting the dial tone from the first tone generating means, detects a malicious call from the first subscriber. A special number for detection is received by the receiving means, identified by the translation means, and silence is transmitted by the second tone generating means to the second subscriber who is the other party of the call, and the second subscriber If the subscriber is accommodated in the same exchange as the first subscriber, the second subscriber's accommodation location information is edited and output as the subscriber's telephone number, and the second subscriber is accommodated in the same exchange as the first subscriber. If the person is accommodated in another station different from the station in which the person is accommodated, the second station received from the other station during call control
edits and outputs the subscriber telephone number of the subscriber, detects a second hooking from the first subscriber, restores the second tone generating means and the receiving means, and connects the first subscriber and the A malicious call detection method characterized by reconnecting a second subscriber.