KR100193817B1 - Subscriber circuit device of polarity inversion signal generation private exchange for charging - Google Patents

Abstract

[Technical field to which the invention described in the claims belong]

Polarity inversion circuit arrangement for charging in subscriber circuit of private exchange.

[Technical Challenges to Invent]

A subscriber station of a private exchange is provided with a polarity inversion signal generator for generating a polarity inversion signal for charging.

[Summary of the solution of the invention]

The subscriber circuit device for generating the polarity inversion signal for charging in the subscriber circuit of the private exchange is connected to the ring and tip terminal of the subscriber line and performs switching in response to the polarity inversion signal generation control signal applied from the controller. And a polarity inversion signal generator for inverting and outputting the polarity of the signal applied from the ring and tip terminal of the subscriber line according to the switching.

[Important Uses of the Invention]

Used for subscriber circuit of private exchange.

Description

Subscriber circuit device of polarity inversion signal generation private exchange for charging

1 is a diagram showing the configuration of a subscriber circuit device of a private switch with a polarity inversion signal generator according to a preferred embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a subscriber circuit arrangement of a private exchange, and more particularly to a subscriber circuit having a polarity inversion signal generating device for generating a polarity inversion signal necessary for billing processing in a private exchange.

In general, the subscriber circuit of the private exchange is implemented in one chip called a subscriber line interface circuit (SLIC), and the line interface circuit chip implements basic functions, also called BORSCHT. Such basic functions typically include Battery Feeding, Over Voltage Protection, Ringing, Supervision, Coding and Decoding, 2W-4W Hybrid, and Subscriber. Test Access.

However, in recent years, various service needs of subscribers have been further increased, and in addition to the functions basically provided as described above in the subscriber circuit of the private exchange, other additional functions provided by the subscriber circuit of the national exchange have been required. A representative example of such an add-on was the billing function. In order to achieve the above charging function, a conventional local exchange has a separate polarity inversion signal generating circuit in the subscriber circuit, and through this process, the subscriber's accounting is calculated through the processing of the polarity inversion signal generated during the call. This charging method is already applied as a publicly known technology for charging of the national exchange. However, in the case of the private exchange, as mentioned above, such charging function is not performed and only the basic functions are performed.

That is, the subscriber circuit of the conventional private exchange did not have a separate polarity inversion signal generator, and thus could not perform a separate charging process. However, the subscriber circuit of the conventional private exchange is configured to connect a telephone to the tip and ring terminals so as to form only a loop for a call with the subscriber line interface circuit. It doesn't exist and there's no way to make a bill.

For reference, there is a problem that the polarity inversion signal generator in the subscriber circuit provided in the local exchange cannot be applied as it is due to the characteristics of the private exchange subscriber circuit device. Therefore, it is necessary to provide a polarity inversion signal generator suitable for the private exchange subscriber circuit device.

Accordingly, it is an object of the present invention to provide a polarity inversion signal generating device, which must be provided in performing a charging in a private exchange, which can solve the above-mentioned conventional problems, as a subscriber circuit device of a private exchange.

Another object of the present invention is to provide a subscriber circuit device having a polarity inversion signal generator suitable for inherent characteristics in the private exchange subscriber circuit device.

According to the present invention for achieving the above object, a control unit for generating a polarity inversion signal generation control signal at the time of forming a call path and charging through the input polarity inversion signal and a subscriber of a private exchange that is driven under the control of the control unit. In the circuit, the signal is connected to the ring and tip terminal of the subscriber line, the switching is performed in response to the polarity inversion signal generation control signal applied from the controller, the signal applied from the ring, tip terminal of the subscriber line in accordance with the switching The subscriber circuit of the private exchange for billing is further characterized in that it further comprises a polarity inversion signal generator for inverting and outputting the polarity.

Hereinafter, a circuit and an operation thereof according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings. In the following description, the detailed items for such configurations are described in detail in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced without these specific details. In addition, in the case of the features of the basic element of the well-known subscriber circuit and the configurations of the known relay circuit block, no detailed description will be made so as not to obscure the present invention.

In addition, prior to the detailed description of the present invention, a method for charging processing according to a polarity inversion signal generation is already known and practiced, and an example thereof is described in the application number 96-00282 filed by the applicant of the present application. Therefore, it should be noted that the detailed description of the present invention is limited to the configuration itself of the polarity inversion signal generator.

First, FIG. 1 shows a subscriber circuit device having a polarity inversion signal generator according to an embodiment of the present invention. Referring to FIG. 1, the polarity inversion signal generating apparatus provided in accordance with the present invention will be described. First, the portion 100 composed of the two contact switches SW11 and SW12 and the portion 101 composed of the first relay RL1 are referred to as 'first switching portion'. To achieve. That is, the first switching unit 100 is installed between the tip and the ring terminal of the subscriber line, which becomes the polarity inversion signal generator proposed in the present invention. The first switching unit 100 performs a function of inverting the polarity of the signal of the subscriber line in response to the polarity inversion signal generation control signal applied from the control unit of the private exchange at the time of forming the communication path. The polarity inversion signal generation control signal is a signal provided from the control unit of the private exchange not shown, which is provided as a low level signal when forming a call. On the other hand, the polarity inversion signal generation control signal is shown as a 'relay control signal' in the figure, which is named according to the control of the relay RL1 101 in the practice of the invention. The 101 part is referred to as a 'first relay part' in the present invention. Referring to the operation of the first switching unit 100, as shown in the drawing, when a low level signal (relay control signal) provided from the controller is applied to the input terminal of the gate N1, the output of the gate N1 becomes a logic low level. This low level output is applied to RL1 of the first relay unit 101 to allow current to pass through. Switching control operation of the first switching unit 100 is performed by the passed current. Accordingly, the two switches SW11 and SW12 of the 100 part perform a switching operation. The operation of the switch SW1 and SW2 is transferred to the normal open terminal NO. In FIG. 1, a broken line L1 is shown to better understand this switch control operation.

The portion 200 shown in FIG. 1 is a relay portion provided in the subscriber circuit of the private exchange, and is a portion for forming a call loop according to the call formation. In the present invention, this is referred to as a 'second switching unit'. For reference, the 200 part is provided in a subscriber circuit of a conventional private exchange, and is a part in which a subscriber telephone is directly connected to the part through a tip and a ring terminal. Therefore, the call loop is formed in accordance with the switching operations of the switches 21 and 22 provided in this portion. In the present invention, when the contacts of the switches SW1 and SW2 of the 100 part are transferred to the normal open terminal NO, this part is also transferred to the normal open terminal NO. This switching operation is performed according to the operation of the second relay unit 201 which is performed simultaneously with the operation of the first relay 101. That is, the relay operation of the second relay unit 201 is performed under the control of the subscriber line interface unit 300, and accordingly, a switch control signal is applied to the second switching unit 200 through L2 to switch the operation of the second switching unit 200. This will be done.

As a result, in the present invention, the switch SW11 and SW12 of the 100 part are contacted with the normal common NC contact, and at the same time, the signal applied through the subscriber line to the 200 part switch SW21 and SW22 is also the normal common NC contact is inverted to reverse polarity. The signal is converted to a signal and then applied to the subscriber line interface unit 300.

In another aspect, the polarity inversion signal is required to generate charges in the subscriber circuit of the private exchange. The switching operation of the first switching unit 100 and the second switching unit 200 is performed at the time of forming the call loop. The signal of the subscriber line applied from the telephone side is inverted and applied to the subscriber line interface unit 300.

Then, the controller of the private exchange then performs the charging process according to the publicly known through the generated polarity inversion signal.

As described above, the present invention requires the generation of the polarity inversion signal in performing the charging in the private exchange, thereby realizing the subscriber circuit having the polarity inversion generating device for generating the polarity inversion signal. Therefore, according to the application of the polarity inversion signal generated by the polarity inversion signal generator according to the present invention there is an advantage that can perform the charging in the private exchange.

Claims (2)

In a subscriber circuit of a control unit which generates a polarity inversion signal generation control signal at the time of forming a call path and charges through an input polarity inversion signal and a private switching circuit driven under the control of the control unit, the ring line and the tip terminal of the subscriber line. And a polarity inversion signal generator for switching in response to a polarity inversion signal generation control signal applied from the controller, and inverting and outputting a polarity of a signal applied from a ring and a tip terminal of the subscriber line according to the switching. Subscriber circuit of the private exchange for billing, characterized in that it further comprises. The subscriber station of claim 1, wherein the polarity inversion signal generating device comprises: a subscriber terminal connected to a tip end by connecting a subscriber line connected to a ring end according to the relay driving with the relay driving according to the application of the polarity inversion signal generation control signal; Subscriber circuit of the private exchange for billing, characterized in that consisting of a switch for connecting to the ring end.