KR100435782B1 - Wire Tapping Device for Voice and Information of Applicant in Private Branch Exchange - Google Patents

Abstract

The present invention relates to a private and subscriber subscriber's information and voice listening device, comprising: a line distribution panel connected to subscriber telephones and configured to distribute circuits of the subscriber telephones to connect to the switch; The PCM interface unit modulates the voice or data transmitted from the exchange subscriber to the transmission highway by modulating the PCM method at a predetermined clock frequency, and demodulates the PCM signal from the reception highway to be received by other users who speak with the exchange subscriber. And a switch block for receiving a modulated signal transmitted from the transmission highway and storing the modulated signal in an internal register in accordance with a clock. The switch block controls the switch block, and transmits voice or data information stored in the switch block to a reception highway. A control unit interface unit for connecting a call with a caller, an exchanger application that registers a target to be intercepted among the subscribers of the switch, and determines whether the target is to be supervised, and stores the call information of the subscriber when the subscriber is a target of supervision registered in the application. day Exchanger comprising a memory unit, and a LAN interface unit for transmitting information stored in the data memory section to the external device Prussian blue; And an intercepting device for intercepting a signal transmitted from the LAN interface unit.

According to the device according to the present invention, there is no need to physically connect the subscriber to be intercepted for the interception, there is an advantage that the installation is easy, and the user who is on the call because the subscriber does not have to worry about the storage and recording of the interception and call information There is no objection to the information, and the information is controlled through the LAN, so that the information on the caller can be maintained.

Description

Wireless Tapping Device for Voice and Information of Applicant in Private Branch Exchange}

The present invention relates to a private exchange subscriber's information and a voice listening device, and more particularly, registers a subscriber to be intercepted in an exchange application program and stores voice or data information of the subscriber in a data memory unit when the registered subscriber calls. Afterwards, the present invention relates to a device capable of controlling the information required for interception using a LAN by transmitting voice or data information to an external interception connected to a LAN interface.

In the related art, an exchange tapping device is described in the case of a subscriber being an analog subscriber and a digital subscriber.

First, the prior art when the switch subscriber is an analog subscriber will be described.

Figure 1 shows the configuration of a conventional analog subscriber interceptor.

As shown in FIG. 1, the conventional analog interceptor structure includes a switch 10 and a line distribution board 11, an analog trunk line / dedicated line 13 connected with a line distribution board, an analog subscriber telephone and the line distribution board 11; It is composed of a tapping device 12 that monitors by connecting lines in parallel.

The line distribution board 11 is a type in which a line of a subscriber telephone is directly connected by dragging a line of a subscriber telephone, and another device can be connected in parallel. Conventionally, in order to intercept, the subscriber's line for interception must be physically connected in the line distribution board, and after the connection, the impedance of the intercepting device must be matched. The problem is that the signal level falls.

2 illustrates the structure of a conventional digital subscriber interceptor.

As shown in FIG. 2, the conventional digital subscriber listening apparatus includes a digital trunk line (T1 or E1) 22 connected to a switch 20, a line distribution panel 21, a line distribution panel 21, and a subscriber digital telephone ( 25), the T1 / E1 receiver 23 connected in parallel with the line distribution board and the switch and the T1 / E1 receiver are connected to each other to constitute a subscriber.

In the case of the digital switchboard, the T1 / E1 receiver 23 connected in parallel in the line distribution board 21 extracts information about 24 subscribers in the case of T1, and extracts voice information for 30 subscribers in the case of E1. The intercepted information is sent to the intercepting device 24 via the track. In addition, the information on the digital switch subscriber, when the digital subscriber calls by designating the subscriber to be intercepted by the switch 20, the subscriber information is transmitted to the interception device 25 through the wire subscriber line 24.

Even in the case of a digital subscriber of a conventional exchange, a specific subscriber must be specified in advance and physically connected in order to intercept, and impedance matching must be performed.

As described above, the tapping apparatus in the conventional switchboard is inconvenient to physically connect the subscriber to be intercepted for the tapping in advance, and the connection should always consider impedance matching. If the impedance matching is not correct, there is a problem that the user can recognize the eavesdropping due to a change in the signal level, especially in the case of the digital subscriber may not be connected to the call itself.

In the present invention, in order to solve the problems of the prior art as described above, by connecting the interception device to the LAN without the need for physically connecting the subscriber for the interception and impedance matching, LAN and the necessary information and voice for interception The present invention proposes an information and voice listening device of a private exchange subscriber that can be controlled by using a.

1 illustrates a configuration of a conventional analog subscriber listening device;

2 illustrates a structure of a conventional digital subscriber listening device;

3 is a diagram showing the overall configuration of a subscriber and subscriber's information and voice listening apparatus according to a preferred embodiment of the present invention;

Figure 4 shows the internal configuration of the exchanger according to a preferred embodiment of the present invention.

In order to achieve the object as described above, the information and voice listening device of the private exchange subscriber according to the present invention is connected to the subscriber telephone, the line distribution panel for distributing the lines of the subscriber telephone connected to the switch; The PCM interface unit modulates the voice or data transmitted from the exchange subscriber to the transmission highway by modulating the PCM method at a predetermined clock frequency, and demodulates the PCM signal from the reception highway to be received by other users who speak with the exchange subscriber. And a switch block for receiving a modulated signal transmitted from the transmission highway and storing the modulated signal in an internal register in accordance with a clock. The switch block controls the switch block, and transmits voice or data information stored in the switch block to a reception highway. A control unit interface unit for connecting a call with a caller, an exchanger application that registers a target to be intercepted among the subscribers of the switch, and determines whether the target is to be supervised, and stores the call information of the subscriber when the subscriber is a target of supervision registered in the application. day Exchanger comprising a memory unit, and a LAN interface unit for transmitting information stored in the data memory section to the external device Prussian blue; And an intercepting device for intercepting a signal transmitted from the LAN interface unit.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the private exchange subscriber information and voice listening apparatus according to the present invention.

3 is a block diagram showing the overall configuration of the subscriber and subscriber's information and voice listening apparatus according to the preferred embodiment of the present invention.

As shown in Fig. 3, the structure of the wiretap device according to the present invention is the same as that of the wire tapping device 31, the switchboard 30, and the subscriber telephone which are conventionally used.

The line distribution board 31, as in the prior art, is constituted by a panel that connects the lines of the subscriber telephones, and serves to distribute the subscriber lines to the exchange. However, in the prior art, the subscriber line to be intercepted by the line distribution panel was connected to the wire interception equipment in parallel, but only the wire distribution in the present invention merely serves to connect the subscriber line to the switch, for interception. Separate lines are not connected in parallel with the tapping equipment. The line connected to the line distribution board 31 is an analog or digital trunk line / dedicated line 32.

The voice or data information transmitted by the subscriber through the subscriber telephone 33 is transmitted to the switchboard 30 through the line distribution board. In the exchange 30, a target to be intercepted is registered among subscribers of the exchange, and an operation program for determining whether the target is intercepted is installed.

When the subscriber making a call by the exchange is an eavesdropping target registered in the application, voice or data information transmitted by the subscriber who is the eavesdropping target is transmitted to the LAN 34 in the exchange. According to a preferred embodiment of the present invention, the LAN is connected using a voice over internet protocol (hereinafter referred to as "VOIP") network access technology, which is a technology for integrating voice and data. The interception equipment is connected to the LAN 34 in the exchange 30, as shown in FIG. 3, and listens to the subscriber's voice or data information transmitted from the LAN.

Figure 4 shows the internal configuration of an exchanger according to a preferred embodiment of the present invention.

The voice or data information of the subscriber transmitted from the line distribution board enters the pulse code modulation (hereinafter referred to as "PCM") interface unit 43 in the exchange. The PCM interface unit 43 modulates the transmitted subscriber's voice or data information in a PCM manner by a constant clock frequency and transmits the subscriber's transmission information to another user who is talking to the subscriber. Demodulates voice or data information.

The digital signal modulated by the PCM interface unit 43 is transmitted to the switch block 42 via the transmission high way 43a. The transmission highway 32a serves as a PCM transmitter. The switch block 42 stores the modulated subscriber's voice or data information in an internal register. When the information is stored, the information is stored in accordance with the clock, and the clock is generated by the clock interface unit 41 shown in FIG. The clock frequency generated at the clock interface must be the same as the clock frequency when modulated at the PCM interface.

The controller interface 40 is connected to the switch block 42 to control the operation of the switch block. In FIG. 4, R / W denotes a read / write signal, / CS1 denotes a chip selection signal, / RESET denotes a reset signal, and / INT denotes an interrupt signal. The controller interface 40 transmits the voice or data information of the subscriber stored in the internal register of the switch block to the reception highway 43b using the data bus and the address bus connected to the switch block. The information transmitted to the receiving subway 43b enters the PCM interface 43, which demodulates the signal from the receiving highway as described above, and transmits the demodulated signal to another user to call the subscriber. Is done.

In addition to controlling the switch block for the subscriber's call, the controller interface 40 transmits the call contents of the subscriber to the data memory unit 44 when the subscriber is an eavesdropping target registered in the application program. . The control unit interface unit 40 uses the address bus and the data bus when transmitting to the data memory unit 44, and provides information received from the transmission highway 43a or information transmitted from the reception highway 43b to another user. The data is transmitted to the data memory unit 44 via the reception 1 highway 47 shown in FIG.

The data memory unit 44 temporarily stores subscriber's call information at a certain address using / CS2 and R / W2 shown in FIG. The reason for temporarily storing the subscriber's voice or data information in the data memory unit 44 is because there are a lot of difficulties in synchronizing the subscriber's call information in real time and transmitting the subscriber's voice information to the interception equipment.

Information stored in the data memory section 44 is transmitted to the LAN interface section 45 using / CS3 and R / W3 shown in FIG. LAN interface unit 45 is directly connected to the external interception equipment, and transmits the information stored in the data memory unit 44 to the interception equipment, and can be intercepted. According to a preferred embodiment of the present invention, the LAN interface unit 45 converts PCM data to G.723.1 and G.729, and preferably supports the Internet call processing function of VOIP through H.323.

As described above, according to the information and voice interception device of the private exchange subscriber according to the present invention, there is an advantage that it is easy to install because there is no need to physically connect the subscriber to be intercepted for interception. In addition, since there is no need for impedance matching, the subscriber does not have to worry about the interception and storage and recording of call information when impedance matching is inaccurate as in the conventional case. In addition, since data and voice of call information are stored in the memory of the exchange and transmitted to the device at the designated place through LAN, there is no restriction on the installation place, and the information is controlled through the LAN to supplement the information on the caller. Can be maintained.

Claims (3)

A line distribution panel connected to subscriber telephones, for distributing lines of the subscriber telephones and connecting the subscriber telephones to the switch; The PCM interface unit modulates the voice or data transmitted from the exchange subscriber to the transmission highway by modulating the PCM method at a predetermined clock frequency, and demodulates the PCM signal from the reception highway to be received by other users who speak with the exchange subscriber. , A switch block which receives a modulated signal transmitted from the transmission highway and stores the modulated signal in an internal register according to a clock; A control unit interface unit controlling the switch block and transferring voice or data information stored in the switch block to a receiving highway to connect a call with the other user; An exchange application program that registers a target to be intercepted among the subscribers of the exchange and determines whether the target is to be intercepted; A data memory unit for storing the call information of the subscriber when the subscriber is the target of the eavesdropping registered in the application program; and A switch including a LAN interface unit for transmitting information stored in the data memory unit to an external interception device; And And an eavesdropping device for listening to a signal transmitted from the LAN interface unit. The method of claim 1, And the call information stored in the data memory unit is information received by the transmitting highway or information transmitted by the receiving highway. The method of claim 1, The LAN interface unit of the private exchange subscriber information and voice listening device, characterized in that to support the VOIP network access technology.