JPH0139263B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic caller tracking system, and more particularly to a caller tracking method in a telephone exchange that automatically tracks and captures a calling subscriber who calls a called subscriber, e.g. maliciously. Regarding the method.

According to conventional caller tracking methods, when a call is received to a certain subscriber and the call is malicious, such as a kidnapping, it is difficult to track and capture the calling subscriber. If the calling subscriber is accommodated in the same telephone exchange as the called subscriber, a means for instructing the calling subscriber is provided in the telephone exchange so that the maintenance personnel can automatically track and acquire the calling subscriber. In other words, it is possible to locate the calling subscriber and output the telephone number, etc. of the calling subscriber to a typewriter or the like.

However, if the telephone exchange in which the calling subscriber is housed is different from the telephone exchange in which the called subscriber is housed, it is not possible to automatically trace the calling subscriber; In such cases, it is necessary to manually track the subscriber such as by operating a switch, which takes time, and if the calling subscriber goes on-hook during that time, there is a problem that the maintenance personnel will not be able to track the calling subscriber.

SUMMARY OF THE INVENTION In view of the above-mentioned problems in the conventional system, it is an object of the present invention to provide a system that allows a maintenance person to receive calls even when the telephone exchange where the calling subscriber is accommodated is different from the telephone exchange where the called subscriber is accommodated. An object of the present invention is to provide an automatic caller tracking system that allows a calling subscriber to be automatically tracked and captured in response to a subscriber's request.

The caller tracking system provided by the present invention is an automatic caller tracking system of an electronic exchange that captures the calling subscriber who called the called subscriber. The exchange includes means for entering the telephone number of the called subscriber whose originating subscriber is to be traced, and a first exchange of the telephone number of the called subscriber and a caller tracing instruction signal via a common signaling device. means for transmitting the telephone number of the called subscriber and the caller tracking instruction signal received from the first exchange to a relay station in a higher hierarchy of the exchange, and the relay station transmits the telephone number of the called subscriber and the caller tracking instruction signal received from the first exchange to all relay stations under the relay station. means for transmitting the telephone number of the called subscriber sent from the relay station to a central processing unit connected to each of the second exchanges via the common line signaling device; storage means for registering the number and the caller tracking instruction signal; and means for comparing the telephone number of the other party called by the calling subscriber with the telephone number of the called subscriber registered in the storage means; , if the comparison results in a match, the line number and the calling subscriber number are activated from the second switching center where the calling subscriber is accommodated to the first switching center via the common line signaling device. This is an automatic caller tracking system characterized in that the first switching center notifies the maintenance personnel of the received telephone number and line number of the calling subscriber.

The accompanying drawing is a block diagram for an automatic caller tracking system according to an embodiment of the present invention, and the embodiment will be explained based on this drawing.

In the figure, EL1 and EL3 are the calling subscriber SUBA making a call to the called subscriber SUBB, respectively.
Exchange center where 1 and SUBA2 are accommodated, EL
2 is the exchange office where the called subscriber SUBB is accommodated;
ET is an exchange connected between the exchanges EL1 and EL3 on the calling side and the exchange EL2 on the called side. Exchanges EL1 and EL3 each have a central processing unit.
First storage device MEM via CC1 and CC4
1 and the second storage device MEM2. The switching center EL1 and the relay station ET are connected to each other by a general communication line via bidirectional trunks BWT connected to each other. Central processing unit CC1 and CC
2 is a common line signal device DT1 connected to each
0 and DT20 via a common line. Connections are made between the exchange EL2 and the relay station, and between the exchange EL3 and the relay station ET in the same manner, so their explanation will be omitted. A typewriter TYP is connected as an output device to the central processing unit CC3 connected to the exchange EL2 on the called side.

The maintenance person types the phone number of the subscriber SUBB who is trying to trace the calling subscriber in advance.
When registered by TYP, the exchange EL2 in which the subscriber SUBB is accommodated sends the telephone number of the subscriber SUBB and the caller tracking instruction signal to the relay station ET which is higher than itself on the exchange hierarchy. Send. In this embodiment, this transmission is performed by the common line signaling device DT.
30 and DT21 (). relay station
When the central processing unit CC2 connected to the ET receives the above-mentioned caller tracing instruction signal, it sends a common line to the central processing units CC1 and CC4 connected to all the exchanges EL1 and EL3 under its own control. Signal devices DT20 and DT10 and DT22 and DT40
Send the above subscriber phone number and caller tracking instruction signal via respectively (). The central processing units CC1 and CC4 of exchanges EL1 and EL3 process the received subscriber telephone number and caller tracing instruction signal by
Register them in the storage devices MEM1 and MEM2 respectively.

When subscriber SUBA1 dials the telephone number of the other subscriber and makes a call, exchange EL1
The other party's subscriber number sent from SUBA1,
Subscriber SUBB registered in storage device MEM1
Check whether the numbers match. If the telephone numbers of the subscriber to whom subscriber SUBA1 called and the subscriber SUBB who instructed tracking do not match, the calling subscriber SUBA calls a subscriber different from the called subscriber SUBB who instructed tracking. Since the call was made to someone else, a normal exchange connection is made as a general call that is not a call to be tracked.

If the telephone numbers of the subscriber to whom subscriber SUBA1 called and the subscriber SUBB who instructed tracking match, then the calling subscriber SUBA1 called the called subscriber SUBB who instructed tracking. , the tracking operation is started. In the tracking operation, the tracking response display signal, the telephone number of the called subscriber SUBB, and the telephone number of the calling subscriber are transmitted from the central processing unit CC1 connected to the exchange EL1 to the common line signaling device DT.
10 and DT20, central processing unit of relay station ET
CC2, and common line signaling devices DT21 and DT30
() to the central processing unit CC3 connected to the called exchange EL2. exchange EL
In step 2, when the central processing unit CC3 receives the tracking response display, it causes the typewriter TYP to output caller information such as the calling subscriber number and notifies the maintenance personnel. The call is made by connecting to the called subscriber SUBB.

Even if subscriber SUBA2 makes a call, subscriber
The operation is similar to the above when SUBA1 makes a call.

In the explanation of the above embodiment, exchange center EL1
and relay station ET and exchange station EL2
Although information transmission between the relay station ET and the relay station ET was performed via the common line signaling device, the sender trunk OST, the register trunk IRT, and the general communication line may be used instead.

Exchange stations EL1, EL2 and
Of course, the number of exchanges is not limited to the three EL3s, and a larger number of exchanges may be connected.

By storing the tracking instruction display signal and the telephone number of the subscriber who instructed tracking in the storage devices of all exchanges belonging to the calling subscriber, tracking operations are started immediately in response to the calling subscriber's call. So,
The speed of the caller tracking process will be faster.

According to the present invention, even if the telephone exchange in which the calling subscriber is accommodated and the telephone exchange in which the called subscriber is accommodated are different, a maintenance person can Since it is possible to automatically track and capture a caller in a short period of time as necessary, automatic caller tracking becomes possible, which is extremely useful for caller tracking over a wide area. Furthermore, maintenance personnel can simply enter the telephone number of the called subscriber who is attempting to trace the calling subscriber at the receiving station, and the calling subscriber's number and the line number used will be automatically notified. The burden on the person will be light.

[Brief explanation of drawings]

The accompanying drawing is a block diagram for an automatic caller tracking system according to one embodiment of the present invention. SUBA1, SUBA2: Calling subscriber, SUBB: Called subscriber, EL1: Exchange office where calling subscriber SUBA1 is accommodated, EL2: Exchange office where called subscriber SUBB is accommodated, EL3: Calling Subscriber SUBA
Exchange station where 2 is accommodated, ET; Relay station, CC
1, CC2, CC3, CC4; Central processing unit, MEM
1, MEM2; Storage device, BWT; Bidirectional trunk, DT10, DT20, DT30, DT40, DT
21, DT22; Common line signaling device, TYP; Typewriter, IRT; Register trunk, OST; Sender trunk.

Claims (1)

[Scope of Claims] 1. In an automatic caller tracking system of an electronic exchange that captures a calling subscriber who called a called subscriber, a first switching office where the called subscriber is accommodated means for inputting a telephone number of a called subscriber whose originating subscriber is to be traced; and means for transmitting the telephone number of the called subscriber and a caller tracing instruction signal to the first exchange via a common line signaling device; means for transmitting the telephone number of the called subscriber and the caller tracking instruction signal received from the first exchange to a relay station in a higher hierarchy, and the relay station transmits the telephone number of the called subscriber and the caller tracking instruction signal received from the first exchange to a relay station subordinate to the relay station. means for transmitting via a common line signaling device to a central processing unit connected to each of all second exchanges, each of said second exchanges transmitting said signals sent from said relay station; a storage means for registering a telephone number of a called subscriber and the caller tracking instruction signal; a telephone number of a subscriber to whom the calling subscriber has called and the called subscriber registered in the storage means; means for comparing the telephone number of the calling subscriber with the telephone number of the calling subscriber; and, if the comparison results in a match, the second exchange in which the calling subscriber is accommodated activates the telephone number of the calling subscriber via a common line signaling device to the first exchange; and a means for transmitting the line number and the calling subscriber's number to which the call was made, and the first exchange notifies the maintenance person of the received telephone number and line number of the calling subscriber. An automatic caller tracking method characterized by: