KR20060064079A - Apparatus and method for call simulation in private branch exchange - Google Patents

Abstract

An object of the present invention is to provide a call simulation apparatus and method for a private exchange. A DTMF tone detector for detecting DTMF tones, a switching unit for switching, a data signal controller for controlling a data signal, and a tone generation for generating a tone A main control unit having a unit and controlling an operation of the private exchange; It is connected to the main controller and the voice signal path and data signal path, the CPU and DSP and the FPGA, and comprises a subscriber interface to perform the subscriber interface, analyze the test tone to check whether the switching abnormality, In the exchange, the DSP of the subscriber board is controlled by firmware without any test equipment such as a local call simulator, and the interface board and control unit of the extension and trunk lines are verified, and the virtual and data paths are generated. Traffic execution performance can also be measured.

Description

Apparatus and method for call simulation in private branch exchange}

1 is a block diagram of a call simulation apparatus of a conventional private exchange,

Figure 2 is a block diagram showing a call simulation method of a conventional private exchange,

3 is a block diagram of a call simulation apparatus of a private exchange according to the present invention;

4 is a flowchart illustrating a call simulation method of a private exchange according to the present invention.

Explanation of symbols on the main parts of the drawings

10: main control unit 11: DTMF detection unit

12: switching unit 13: data signal control unit

14: tone generating unit 20, 30: subscriber interface unit

21, 31: CPU 22, 32: DSP

23, 33: FPGA

The present invention relates to a call simulation apparatus and a method of a private exchange, and in particular, a firmware (Digital Signal Processor, DSP) of a subscriber board without a separate test equipment such as a local call simulator in a private exchange is firmware. (Firmware) control to verify the interface boards and controllers of stations and trunk lines, voice and data paths, and generate virtual calls to measure the overall call traffic performance of the system. A call simulation apparatus for a private exchange and a method thereof are provided.

In general, a private branch exchange (PBX) is a kind of subscribing telephone and means an internal telephone exchange facility and an extension telephone installed in a premises such as a public office or a company. This exchange serves to connect trunk lines and stations to each other by means of telephone lines (or trunk lines) of the on-site exchange facilities and the belonging switching handling sections. Increasing the use of telephone exchanges used to relay telephone networks, including data or integrating voice and data communication in offices, is being used for network construction with local area networks (LANs). High line efficiency and high noise enable high quality data communication.

These private exchanges may also include or include separate Private Automatic Branch Exchanges (PABXs). In general, PABXs are exchanges based on automatic communication between stations of the local exchanges. Outgoing connections are usually direct outward dialing (DOD), but connections between external subscribers and extension subscribers are either manually connected via a transit station, or even incoming calls may be direct inward dialing (DID).

1 is a block diagram of a call simulation apparatus of a conventional private exchange.

Here, reference numeral 1 denotes a private exchange, 2 and 3 denote a subscriber interface unit that performs a subscriber interface to a trunk line or an extension in the private exchange 1, and 4 denotes a main word controlling the operation of the private exchange 1. It is wealth.

In addition, reference numeral 5 in the main controller 4 is a DTMF tone detector for detecting a dual tone multi frequency (DTMF) tone, and 6 is connected to a subscriber interface unit 2 (3) to perform signal switching. 7 is a data signal control unit for controlling the data signal interfaced by the subscriber interface unit 2 and 3, and 8 is a tone generation unit for generating a tone.

Also, reference numeral 9 is a local call simulator connected to the subscriber interface 2 and 3 of the private exchange 1 to perform a call simulation.

Figure 2 is a block diagram showing a call simulation method of a conventional private exchange.

As shown therein, the local call simulator 9 and the subscriber interface 2, 3 of the private exchange 1 are connected to connect the subscriber interface 2, 3 in the local call simulator 9. Occupying a loop through (ST1); Generating a DTMF tone in the tone generator 8 in the private exchange 1 after the occupancy (ST2); After generating the DTMF tones, a test tone is generated in the local call simulator 9 and passed through the subscriber interface unit 2 and 3 to detect a test tone (ST3).                         

The operation of the prior art will be described in detail with reference to the accompanying drawings.

First, call traffic performance test in a general private exchange is mainly performed using a local call simulator (9), which is an expensive test equipment.

The test equipment, such as the local call simulator 9, acts as an extension subscriber in a public switched telephone network (PSTN) network. Detects a dial tone of the private exchange 1, and transmits a designated digit tone to the private exchange 1,

Then, the switching unit 6 of the private exchange 1 detects the corresponding tone, gives an alarm signal (ring, ring) to the called party, and checks the ring voltage at the test equipment connected to the called party to form a call path (loop). .

When the call path is configured in this way, the tester generates the test tone, and if the tone is analyzed and received within the defined level, it determines that the call path is normal and generates a reaction tone. By analyzing the method, if there is no abnormality, it is considered normal and the test of one call is completed.

On the other hand, by performing a separate time (Separate Time) adjustment for each call, and only the destination information is set in the local call simulator (9) it becomes possible to simulate the overall call traffic for the private exchange (1).

The following is a system component that can be verified during the test with the local call simulator 9, which is a call traffic equipment.

Extension subscriber interface function (Layer 1, 2)

-Call processing tone transmission function (Dial Tone, etc.)

-Data, voice path

-DTMF reception function

Control switching function

-Line board firmware related to call processing, firmware and software of controller

-Call processing related cell traffic execution performance

However, this conventional technology has the following problems.

First, the local call simulator is used not only during the development of the private exchange but also during the verification when the private exchange is shipped.

Second, if there is a defect in the test equipment itself, such as a local call simulator, there was also a very difficult problem to check.

Third, because the specification of the test equipment is limited to a maximum of 32 channels, it is impossible to test more call processing functions.

Accordingly, the present invention has been proposed to solve the above-mentioned conventional problems, and an object of the present invention is to control the DSP of a subscriber board by firmware without a separate local call simulator or the like in a private exchange. The present invention provides a call simulation apparatus and method for a private exchange that can verify the overall call traffic performance of a system by performing verification of the interface board, the controller, and the voice and data paths.

In order to achieve the above object, the call simulation apparatus of a private exchange according to an embodiment of the present invention,

A main control unit including a DTMF tone detection unit for detecting a DTMF tone, a switching unit for switching, a data signal controller for controlling a data signal, a tone generator for generating a tone, and controlling an operation of the private exchange; It is connected to the main controller and voice signal path and data signal path, and has a CPU, DSP and FPGA, and includes a subscriber interface unit for performing a subscriber interface and analyzing a test tone to determine whether switching is abnormal. It is characterized by the configuration.

In order to achieve the above object, a call simulation method of a private exchange according to an embodiment of the present invention,

A first step of reporting a virtual off-hook from the first subscriber interface unit to the main control unit, receiving a dial tone and transmitting a DTMF tone again; A second step of transmitting a ring transmission command from the main control unit to a second subscriber interface unit after the first step, and then receiving a virtual off hook report; A third step of transmitting a test tone from the first subscriber interface unit to the second subscriber interface unit and receiving the test tone again and analyzing the tones transmitted from the first and second subscriber interface units, respectively; And a fourth step of reporting a virtual on-hook to the main control unit from the first and second subscriber interface units after the third step.

Hereinafter, an embodiment according to the present invention, a call simulation device for a private exchange, and a method thereof will be described with reference to the accompanying drawings.

3 is a block diagram of a call simulation apparatus of a private exchange according to the present invention.

As shown therein, a DTMF tone detection unit 11 for detecting DTMF tones, a switching unit 12 for switching, a data signal control unit 13 for controlling a data signal, and a tone generator 14 for generating a tone And a main control unit 10 for controlling the operation of the private exchange; The main controller 10 is connected to the voice signal path and the data signal path, and the CPU 21, 31, the DSP 22, 32, and the FPGA (Field Programmable Gate Array) 23 ( 33) and includes a subscriber interface 20 (30) for performing a subscriber interface and analyzing a test tone to determine whether switching is abnormal.

In the above, the DSPs 22 and 32 are responsible for transmitting and receiving DTMF tones and test tones, report off-hooks to the main control unit 10, and analyze the detected tones to determine abnormal switching in the private exchange. It is characterized by checking whether or not.

4 is a flowchart illustrating a call simulation method of a private exchange according to the present invention.

As shown therein, a first step (ST11 to ST13) of reporting a virtual off-hook from the first subscriber interface unit 20 to the main controller 10 and then receiving a dial tone and transmitting DTMF tones again; A second step (ST14 to ST16) of transmitting a ring transmission command from the main controller 10 to the second subscriber interface unit 30 after the first step, and then receiving a virtual off-hook report; The test subscriber transmits a test tone from the first subscriber interface 20 to the second subscriber interface 30 and receives the test tone again, and analyzes the tones transmitted from the first and second subscriber interface 20 and 30, respectively. A third step ST16 to ST19; And a fourth step (ST20) (ST21) of reporting the virtual on hook from the first and second subscriber interface units 20 and 30 to the main controller 10 after the third step.

Referring to the accompanying drawings, the operation of the call simulation apparatus and method of the private exchange according to the present invention configured as described above will be described in detail as follows.

First of all, the present invention performs a firmware control of a DSP of a subscriber board without test equipment such as a separate local call simulator in a private exchange to verify the interface boards and controllers of the station and trunk lines and to the voice and data paths and generate a virtual call. The overall call traffic performance of the system was also measured.

Therefore, the DSP 22 and 32 are mounted on the first and second subscriber interface units 20 and 30 respectively connected to the station and the trunk line so that call processing simulation can be performed.

The DSPs 22 and 32 are responsible for transmitting and receiving DTMF tones and test tones, and operating the firmware of the subscriber interface unit 20 or 30 on the extension or trunk line in the test mode to generate a call (in this case, Off Hook is reported to the main control unit 10).                     

The firmware of the subscriber interface unit 20, 30 manages the DSP 22, 32 so that the corresponding frequency tone can be transmitted at a corresponding timing, and also analyzes the tone detected by the DSP 22, 32, and the private exchanger. Check whether or not the switching at

In addition, by periodically reporting the virtual Off Hook (On Hook), On Hook (On Hook) message to the main control unit 10, the operation in the main control unit 10 is the call processing when a test equipment such as a local call simulator is connected Perform the same action as performing the function.

Referring to the operation of the present invention in more detail as follows.

First, the DSP 22 of the first subscriber interface unit 20, which is the calling party, is responsible for transmitting and receiving DTMF tones and test tones, and can also use them in a test mode.

Therefore, in the test mode for the call simulation, the DSP 22 of the first subscriber interface 20 reports the virtual off-hook to the controller to generate a call.

At this time, the virtual off-hook output from the DSP 22 of the first subscriber interface 20 is input to the data signal controller 13 of the main controller 10 via the data signal path (ST11).

Then, the main controller 10 generates the dial tone in the tone generator 14 and transmits the dial tone to the first subscriber interface 20 through the voice signal path (ST12).

Accordingly, the DSP 22 of the first subscriber interface 20 detects the tone and transmits the DTMF tone set by the operator to the DTMF detector 11 in the main controller 10 via the voice signal path. .

Then, the switching unit 12 of the main control unit 10 switches. The switching of the data signal control unit 13 of the main control unit 10 causes the DSP of the second subscriber interface unit 30 to be called. The ring transmission command is transmitted to (32) (ST14).

Accordingly, the ring rings at the second subscriber interface unit 30 on the called side.

Therefore, the second subscriber interface unit 30 receives the ring message in firmware and reports the virtual off-hook to the data signal controller 13 in the main controller 10 as a reaction (ST15).

By this report, the second subscriber interface 30 appears to have received the ring, and a call path is established between the first subscriber interface 20 on the calling side and the second subscriber interface 30 on the called side. Will be opened.

In this state, the user-defined test tone is generated in both directions and displayed on the monitor so that the tester can check if it is accurately detected by the DSP (22) (32).

That is, the first subscriber interface 20 transmits the test tone to the second subscriber interface 30 (ST16), and the DSP 32 of the second subscriber interface 30 analyzes the received tone. (ST17).

In addition, the second subscriber station 30 transmits a test tone to the first subscriber station 20 (ST18), and the DSP 22 of the first subscriber interface 20 analyzes the received tone. (ST19).

When the first subscriber interface 20 and the second subscriber interface 30 analyze the transmitted tone, the first subscriber interface 20 and the second subscriber interface 30 report the virtual on-hook to the main controller 10 and close the call path.

In addition, the reporting interval and test tone setting of each channel's off-hook are set up to be inputted to the monitor so that various test environments are possible.

In addition, the connection between the first subscriber interface unit 20 and the second subscriber interface unit 30 may be connected to the station-to-extension or the extension-to- trunk line or the trunk-line-to- trunk line, so that a test can be performed. Therefore, there is much convenience in scalability.

As such, the present invention performs a firmware control of the DSP of the subscriber board without testing equipment, such as a local call simulator, in the private exchange to verify the interface boards and controllers of the station and trunk lines and the voice and data paths, and generate virtual calls. It also measures the overall call traffic performance of the system.

Although the preferred embodiment of the present invention has been described above, the present invention may use various changes, modifications, and equivalents. It is clear that the present invention can be applied in the same manner by appropriately modifying the above embodiments. Accordingly, the above description does not limit the scope of the invention as defined by the limitations of the following claims.

As described above, the call simulation apparatus and method of the private exchange according to the present invention have the effect of ensuring cost savings, convenience of maintenance, and scalability by self-testing method through tone generation and integration of a detector. Will be.                     

In addition, the present invention is able to perform the test in the state of excluding the external environment when testing in the private exchange has the effect that can accurately verify the execution performance of the private exchange.

Claims (3)

A main control unit including a DTMF tone detection unit for detecting a DTMF tone, a switching unit for switching, a data signal controller for controlling a data signal, a tone generator for generating a tone, and controlling an operation of the private exchange; It is connected to the main control unit and the voice signal path and data signal path, CPU and DSP and FPGA, and comprises a subscriber interface for performing a subscriber interface and analyzing the test tone to determine whether switching abnormality Call simulation device of a private exchange. The method of claim 1, wherein the DSP, The call simulation apparatus of the private exchange which is responsible for transmitting and receiving DTMF tones and test tones, reports off-hooks to the main controller, and analyzes the detected tones to determine whether switching in the private exchange is abnormal. A first step of reporting a virtual off-hook from the first subscriber interface unit to the main control unit, receiving a dial tone and transmitting a DTMF tone again; A second step of transmitting a ring transmission command from the main control unit to a second subscriber interface unit after the first step, and then receiving a virtual off hook report; Transmitting a test tone from the first subscriber interface unit to the second subscriber interface unit, receiving the test tone again, and analyzing the tones transmitted from the first and second subscriber interface units, respectively; And a fourth step of reporting a virtual on hook from the first and second subscriber interface units to the main control unit after the third step.

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