KR100208943B1 - Apparatus and method for measuring levy pulse in switching system - Google Patents

Abstract

The charging measuring device of the exchanger that counts and charges the charging pulse, the oscillator generating the pseudo charging pulse, the selector having a switch and controlling the output of the oscillator on / off, and the output terminal of the oscillator connected in parallel to the pseudo charging pulse. Frequency regulator to adjust the frequency, Level adjuster to adjust the level of pseudo charging pulse connected in parallel with the output terminal of the oscillator, Feeding bridge connected between the output terminal of the selector and the trunk line circuit of the exchanger and feeding the charging pulse signal to the trunk line circuit. It consists of.

Description

Charging pulse measuring device and method of exchange system

The present invention relates to a billing measuring device and method of the exchange system, and more particularly to a device and method that can be billed by calculating the billing pulse.

1 is a block diagram of a general exchange system, wherein the control unit 111 controls the overall switching of the key telephone system to control call switching and provide various services to a user. The ROM 112 stores basic calls and programs and initial service data of the control unit 111 for performing various functions. The RAM 113 temporarily stores data generated during program execution under the control of the controller 111.

The switching circuit 114 switches various tones and voice data under the control of the controller 111. The subscriber circuit 115 supplies a call current to an extension subscriber (not shown) under the control of the control unit 111 and interfaces a signal between the extension subscriber and the switching circuit 114. Here, the extension refers to a line connecting the switching system and the subscriber telephone. The ring generator 116 generates a ring signal and supplies it to the subscriber line. The trunk line circuit 117 forms a trunk line call loop by seizing the trunk line under the control of the control unit 111, and interfaces a signal between the trunk line and the switching circuit 114. Here, the trunk line refers to a line connecting the trunk line circuit 119 and the national exchange.

The tone generator 118 generates various tone signals under the control of the controller 111 and outputs them to the switching circuit 114. A DTMF receiver 119 analyzes a DTMF signal input from the switching circuit 114, converts the DTMF signal into digital data, and outputs the digital data to the controller 111. Here, the DTMF signal input to the DTMF receiver 119 by the switching circuit 114 is a telephone number generated by the trunk line subscriber or a telephone number generated by an extension subscriber. The DTMF transmitter 120 converts the digital data output from the control unit 111 into a DTMF signal and outputs the DTMF signal to the switching circuit 114. Here, the DTMF signal output from the DTMF transmitter 120 becomes the telephone number of the trunk line subscriber generated when the station side calls the trunk line side.

In an exchange system having the above configuration, when an arbitrary extension subscriber generates a trunk call, billing is calculated according to the call volume. At this time, depending on where the exchange system is installed, it may be necessary to add a bill for the trunk line of each extension subscriber and notify the subscriber. That is, in some cases, it is necessary to immediately calculate the billing for the national call generated by each station subscriber such as a hotel or a hospital. Such a switching system includes a method of activating a charging function when outputting a polarity reverse signal at a telephone station, and a method of performing a charging function by counting a metering pulse output from the telephone station.

Accordingly, an object of the present invention is to provide a method for measuring the charging pulse so that the charging system can accurately calculate the charging according to the call amount in the outgoing call.

It is another object of the present invention to provide a billing measuring apparatus capable of tracking the frequency and level of a billing pulse to accurately calculate billing in an exchange system.

It is still another object of the present invention to provide a method capable of displaying the charging pulses generated from the charging pulse generator in the exchange system.

In order to achieve the above object, the present invention provides a billing measuring device for an exchanger that counts and charges a charging pulse, an oscillator for generating a pseudo charging pulse, a selector having a switch and controlling an output of the oscillator on / off; A frequency adjuster connected in parallel to the output terminal of the oscillator to adjust the frequency of the pseudo charging pulse, a level adjuster connected in parallel to the output terminal of the oscillator to adjust the level of the pseudo charging pulse, and a trunk line of the output terminal of the selector and the exchanger And a feeding bridge connected between the circuits and feeding the charging pulse signal to the trunk line circuit.

1 is a diagram showing a block configuration of an exchange system.

2 is a diagram showing the configuration of a billing measurement apparatus of an exchange system according to an embodiment of the present invention;

3 is a flowchart showing the charging measurement operation of the exchange system according to the embodiment of the present invention.

The billing measuring apparatus and method according to an embodiment of the present invention tracks the frequency and level of the billing pulse in hardware to accurately calculate the billing, and is displayed when the billing pulse is detected in the digital telephone by software. Measure to be able. To this end, in the embodiment of the present invention, Figure 2 shows the configuration of a measuring device for detecting the charging signal transmitted from the telephone station using a measuring instrument and a test jig, Figure 3 is received from the telephone line in the switching system It is a flowchart illustrating the operation of displaying the number of detected charging pulse signals in the digital telephone.

Referring to FIG. 2, the measuring device 10 is connected to the trunk line circuit 21 of the switch 20, and the switch 20 forms a communication path between the analog subscriber 25 and the digital subscriber 23 in the measurement mode.

First, referring to the configuration of the measuring device 10, the oscillator (signal generator or oscillator) 11 generates the same frequency as the charging pulse generated in the telephone station. The oscillator 11 may use HP / 2040. The test jig 12 includes a switch (function generator or switch), and is connected to the output terminal of the oscillator 11 to connect or disconnect the output of the oscillator 11 to the trunk line circuit 21 of the exchange system. An oscilloscope 14 is connected in parallel to the output terminal of the oscillator 11 and measures the frequency of the pulse output from the oscillator 11. The oscilloscope 14 may use HP / 54601A. Voltage measuring device (DVM) 15 is connected in parallel to the output terminal of the oscillator 11 to measure the level (Vrms) of the pulse output from the oscillator 11. The voltage meter 15 may use HP / 3478A. A feeding bridge 16 is connected to the trunk line circuit 21 of the billing measuring device and the exchanger, and performs a function of feeding a voltage driving the trunk line circuit 21 in the measuring device.

Secondly, referring to the configuration of the exchanger 20, the trunk line circuit 21 is connected to the feeding bridge 16 of the measuring device and performs a function of interfacing with the measuring device. The analog subscriber circuit 24 functions to form a communication path in the exchange 20 by the analog subscriber 25, and the digital subscriber circuit 22 outputs to the digital subscriber 23 so that the number of pulses output from the measuring device 10 can be displayed. The trunk line circuit 21 corresponds to the trunk line circuit 117 of FIG. 1, and the digital subscriber circuit 22 and the analog subscriber circuit 24 correspond to the subscriber circuit 115.

Looking at the operation of the billing measuring device having the configuration described above, first through the analog telephone 25 to form a communication path between the analog subscriber circuit 24 and the trunk line circuit 21 to calibrate the trunk line (seizure), the exchange 20 is a digital signal Call subscriber 23. Therefore, when the billing measurement mode is performed, the calling party becomes the analog telephone 25 and the called party becomes the digital subscriber 23.

When the billing measurement communication path is formed as described above, the measurement selector 12 is controlled to form an output passage of the oscillator 11. At this time, the pulse signal output from the oscillator 11 is generated at the same frequency as the charging pulse generated from the telephone station. At this time, the operator of the measuring device 10 adjusts the frequency and level of the pseudo charging pulse signal output from the oscillator 11 by adjusting the oscilloscope 14 and the voltage measuring device 15 connected to both ends of the selector 12 to adjust the activation range and the deactivation range to be measured. Set it. For example, suppose that the charge exchange rate is sensed by a private exchange at 11.88KHz-12.12KHz and a level below 50mVrms. In addition, it is assumed that the range in which the charging pulse cannot be sensed by the private exchange is less than 11.88 KHz, more than 12.12 KHz, and more than 50 mVrms. The operator of the measuring device can then set the desired measurement range by adjusting the oscillator 14 and the voltage meter 15 while watching the pseudo charging pulse output from the oscillator 11.

In the above measuring method, each time the frequency and level of the set range are turned on / off by the switch in the selector 12, the number of detected charging pulses of the digital telephone 23 operates the switch in the selector 11 within the charging pulse detection range. Each time you do this, it is incremented by one. In the range in which the charging pulse signal cannot be detected, the charging pulse signal of the digital telephone 23 is not detected and is not counted.

Referring to FIG. 3, the billing measurement operation as described above, FIG. 3A is a flowchart performed when a call is detected. The control unit of the switch 20 (which becomes the control unit 111 of FIG. 1) first generates a trunk line signal from the analog subscriber 25. When the digital subscriber 23 is called, the charging pulse is detected in step 311 while the measurement subscriber path between the analog subscriber 25 and the digital subscriber 23 is formed. When the selector 12 of the measuring device 10 is turned on, the control unit detects the reception of the charging pulse in step 313, outputs a charging pulse detection message to the call control processor in step 315, and waits for detection of the next charging pulse.

Here, the charging pulse detection message performs a process as shown in FIG. 3B in a call state, and performs a process as shown in FIG. 3C in a call end state.

First, referring to the operation of FIG. 3B, when the charging pulse detection message is received in the call mode, the call control processor detects this in step 321, increases the count of the charging pulse in step 323, and in step 325, the digital telephone 23. Update the billing display data and send it to the digital telephone 23; The digital telephone 23 then displays the charging information output through the digital subscriber circuit 22. In addition, when a billing printer output request is received for the corresponding phone number, in step 327, the current billing information is outputted to the printer and printed, and execution ends.

When the call ends in the measurement process of FIG. 3B, the charging pulse signal is blocked.

Secondly, referring to the operation of FIG. 3C, when a call termination message is received in step 331 at the end of the call, steps 333 to 335 are generated to request a billing print by generating a billing message including the MP, and in step 337. Call termination processing.

If billing is measured in the same way as above, it is not necessary to connect and test the telephone line in the on-line tank of the exchanger 20, and the billing can be measured to the required standard.

As described above, since the measuring device generates a pseudo charging pulse signal in the private exchange and the exchange forms the charging measurement path, the charging measurement function can be efficiently performed, and the activation range and the deactivation range of the charging in the measuring device can be determined. By setting the pseudo charge pulse can be generated to improve the reliability of the charging measurement.

Claims (2)

An apparatus for measuring charge of an exchanger that counts and charges a charging pulse, comprising: an oscillator for generating a pseudo charging pulse, a selector having a switch, and an on / off control of the output of the oscillator; A frequency adjuster for adjusting the frequency of the pseudo charging pulse, a level adjuster connected in parallel with the output terminal of the oscillator, and a level adjuster for adjusting the level of the pseudo charging pulse, and between the output line of the selector and the trunk line circuit of the exchanger, the trunk line circuit Charge measuring device of the exchange, characterized in that consisting of a feeding bridge for feeding a charging pulse signal to the. A charging measurement method of an exchanger having a measuring device for generating a pseudo charging pulse, comprising: forming a charging measuring currency path with a second extension subscriber on request of a first extension subscriber, and generating a pseudo charging pulse generated by the measuring device. And a measurement range is set by adjusting a frequency and a level, and controlling a measurement device in the measurement range to control the supply of the pseudo charging pulse to measure the charging state.

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