KR100442430B1 - Keyphone system's analog main wire and extension interface board and transmission characteristics control method and Keyphone system - Google Patents

Abstract

The present invention relates to an analog trunk line and an extension interface board of a keyphone system, and the analog trunk line and extension interface board and a transmission characteristic control method of a keyphone system according to the present invention are characterized in that the specification of the trunk line and extension transmission characteristics of a country connected to the keyphone system. A DSP coefficient value dedicated memory for downloading and storing a satisfied DSP coefficient value; And an interface circuit including a DSP codec for impedance matching and PCM conversion of voice signals.

According to the present invention, it is possible to download and operate the required coefficient value according to the country selected by the user from the CO line and the station interface board so that the CO line and the station interface board can be easily operated in various countries without replacing the board. Is expected.

Description

Keyphone system's analog main wire and extension interface board and transmission characteristics control method and Keyphone system

The present invention relates to an analog trunk line and an extension interface board of a key phone system, and more particularly, to control transmission characteristics of an analog trunk line / extension interface board of a key phone system for operating the analog trunk line and extension interface boards according to different transmission characteristics for each country. It relates to a method and a keyphone system.

The key phone system accepts trunk lines such as public switched telephone networks (PSTNs) to the key phone main devices and freely uses them at each station assigned to each unique number. It is a communication system that makes it possible to perform tasks.

1 is a block diagram showing the configuration of an analog trunk line and an extension interface board of a conventional key phone system.

Referring to FIG. 1, a key phone system includes an analog trunk line interface board 10 connected to a trunk line to interface with the system, and a user telephone connected to an extension line assigned a unique number to a trunk line connected to the trunk line interface board 10. It is characterized in that it comprises an analog station interface board 20 for interfacing to use, the analog trunk line interface board 10 and the station interface board 20 and the central control board 30 for controlling the entire system. .

Particularly, the analog trunk line and extension interface boards 10 and 20 include a trunk line and extension matching circuit 12 including hardware circuitry for matching impedance to satisfy specifications according to the unique transmission characteristics of the country in which the key phone system is used. 22) and analog trunk lines and station interface circuits 11 and 21 including voice codecs 13 and 23 for PCM conversion of voice signals.

At this time, the trunk line matching circuits 12 and 22 provide a unique impedance for connecting the trunk lines of each country to configure a hardware circuit so that the key phone system and the trunk line can be connected and operated.

In addition, the central control board 30 is a CPU 31 for controlling and managing the overall system operation, the PCM switching device 32 to connect the trunk line and the station so that voice data can be transmitted and received, and the memory used for system operation. And a communication port 34 for communication between the 33 and the keypad system management terminal.

The management terminal connected through the communication port 34 may be connected and used by the system administrator to update the software program of the central control board 30 or to perform operation control.

2 is a flowchart illustrating an operation procedure of a transmission characteristic control method of a conventional analog trunk line and extension interface board.

Referring to FIG. 2, in order to operate the keyphone system, first, a country in which the analog trunk lines and the extension interface boards 10 and 20 of the keyphone system are used is determined (S11).

When the country in which the analog trunk lines and the station interface boards 10 and 20 are to be used is determined, the matching circuit is modified to satisfy a specification for connecting with the trunk line used in the determined country (S12).

That is, the circuit is modified so that impedance matching is performed by changing the impedance value by resistance or capacitance in hardware to connect with the trunk line.

After the modification of the circuit as described above, the analog trunk line and the station interface board (10, 20) is generated to operate in accordance with the corresponding country specifications (S13).

However, as described above, the method of modifying the matching circuit by changing the impedance value in hardware is not available in other countries once the analog trunk line and extension interface boards are created, and if the connected countries are different, the board itself may be redesigned or matched. There was an inconvenience in modifying the circuit.

In addition, even if it is manufactured with analog CO lines and extension interface boards operating in the country, if the transmission characteristics are different between regions, if the impedance value is different, the transmission characteristics may deteriorate.

In order to solve the above problems, the present invention stores in advance the DSP coefficient value for impedance matching, which is set differently for each country, in the memory of the central control board, and the coefficient required according to the country selected by the user in the trunk line and the station interface board. To provide keyphone system and control method of transmission characteristics of analog trunk line / extension interface board of keyphone system that enables users to download and operate values so that trunk line and extension interface board can be operated in various countries without changing board. There is this.

1 is a block diagram showing the configuration of an analog trunk line and an extension interface board of a conventional key phone system.

2 is a flowchart illustrating an operation procedure of a transmission characteristic control method of a conventional analog trunk line and extension interface board.

Figure 3 is a block diagram showing the configuration of the analog trunk line and the station interface board of the key phone system according to an embodiment of the present invention.

4 is a flowchart illustrating an operation procedure of a transmission characteristic control method of an analog trunk line and an extension interface board of a key phone system according to an exemplary embodiment of the present invention.

Analog trunk line and extension interface board of the key phone system according to the present invention,

A DSP coefficient value dedicated memory for downloading and storing DSP coefficient values satisfying trunk line and station transmission characteristic specifications of a country connected to the key phone system;

And an interface circuit including a DSP codec for impedance matching and PCM conversion of speech signals.

Preferably, the memory is connected to the analog trunk line and the station interface board, and controls a system operation, and comprises a memory for storing the DSP coefficient value information that satisfies the transmission characteristics specification for each country stored in the DSP coefficient value dedicated memory It characterized in that the configuration further comprises a central control board.

In addition, the transmission characteristics control method of the analog trunk line and the station interface board of the key phone system according to the present invention,

A system administrator inputting a country code connected to a key phone system through a terminal connected to the central control board;

Retrieving a DSP coefficient value according to the country code from a memory of a central control board and storing the DSP coefficient value in a dedicated memory for DSP coefficients of the analog trunk lines and the station interface board;

The analog trunk line and the station interface board is configured to operate as a board dedicated to a corresponding country according to a coefficient value stored in a DSP coefficient value dedicated memory.

Preferably, when the country connected to the keyphone system is changed

Inputting a changed country code through a user terminal connected to a central control board;

The DSP coefficient value according to the input country code is loaded from the memory, and stored in the DSP coefficient value dedicated memory of the analog trunk lines and the station interface board, and operated as a modified country dedicated board.

Preferably, in the operation of the analog extension and trunk line board,

By accessing the DSP coefficient value dedicated memory through the user terminal connected to the control board, it is possible to modify the DSP coefficient value for solving the characteristic problem for each region in the country.

An analog trunk line and an extension interface board and a transmission characteristic control method of a key phone system according to the present invention configured as described above will be described with reference to the accompanying drawings.

3 is a block diagram illustrating a configuration of an analog trunk line and an extension interface board of a key phone system according to an exemplary embodiment of the present invention.

Referring to FIG. 3, an analog trunk line interface board 100 for connecting a key phone system and a trunk line, an analog extension interface board 200 for connecting a user phone having a unique number with a key phone system, and the analog trunk line and It is configured to include a central control board 300 connected to the station interface board (100, 200) to control the system.

Meanwhile, the analog trunk lines and the station interface boards 100 and 200 include analog trunk lines and the station interface circuits 110 and 210 for the interface, respectively, and match the impedance matching in the analog trunk lines and the station interface circuits 110 and 210, respectively. DSP codec filters (120, 220) for PCM conversion of speech signals and DSP coefficient value dedicated memories (130, 230) for storing and providing DSP coefficient values for satisfying transmission characteristic specifications of the country connected to the system. It is configured by.

In addition, the central control board 300 is connected to the CPU 310 for the overall control of the system, and the analog trunk line and the station interface board (100, 200) PCM for switching voice data for telephone calls to the trunk line and the station Connecting a switching device 320, a memory 330 that stores DSP coefficient values so that the analog trunk lines and the station interface boards 100 and 200 satisfy national transmission characteristic specifications, and the key phone system and the management terminal. It is configured to include a communication port 340.

The key phone system is connected to the management terminal via LAN or serial communication via the communication port 340, receives a country code for operating the system, and loads different DSP coefficient values in the country code from the memory to the analog trunk line and the station interface. The DSP coefficient value dedicated memories 130 and 230 of the boards 100 and 200 are stored in the board 100 and 200 so that they can operate while satisfying the transmission characteristic specification in any country.

The operation method described above will be described in more detail with reference to FIG. 4.

4 is a flowchart illustrating an operation procedure of a method for controlling transmission characteristics of an analog trunk line and an extension interface board of a key phone system according to an exemplary embodiment of the present invention.

Referring to FIG. 4, first, in a key phone system, DSP coefficient values satisfying a transmission characteristic specification for each country are stored in a table format for each country in a memory of the central control board 300 (S101). This is pre-stored at system design time, and can be used to upgrade the system's software to further store DSP coefficients from other countries.

When the DSP coefficient values for various countries are stored in the memory 33 as described above, the administrator inputs a country code to which the current keyphone system is connected through the management terminal (S102), and the CPU 310 of the central controller 300. ) Checks the entered country code (S103).

According to the country code, the CPU 310 searches the memory 330 and loads the DSP coefficient values of the corresponding country to the DSP coefficient value dedicated memories 130 and 230 in the analog trunk lines and the station interface boards 100 and 200. Save (S104).

According to the stored DSP coefficient value, the analog trunk lines and the station interface boards 100 and 200 operate as the board dedicated to the corresponding country (S105).

As described above, if the administrator simply inputs only the country code, the administrator sets the country's analog trunk line and extension interface board to transfer the DSP coefficient value stored in advance to the board so that the DSP code can be changed simply by changing the country code even if the country is changed. By reloading the value from memory and saving it, it can be operated with analog CO lines and station interface boards that can be used in changed countries.

In addition, even if they are used in the same country, there may be a problem that a part of DSP coefficient value needs to be changed due to regional characteristics due to regional characteristics. In this case, simply connect the management terminal to the communication port and directly connect the analog trunk line and extension. It is provided with the function to modify the coefficient value by connecting to the DSP coefficient value dedicated memory in the interface board.

As described above, the method for controlling the transmission characteristics of the analog trunk line / extension interface board of the keyphone system according to the present invention and the keyphone system allow the analog trunk line and extension interface boards of the conventional keyphone system to operate by creating a new matching circuit for each country. The DSP coefficient value that satisfies the national transmission characteristics specification is stored in the memory, not the impedance matching circuit, so that the DSP coefficient value can be stored and provided. It has the effect of modifying the DSP coefficients of the system so that it can be used in any country.

In addition, even if an analog transmission problem occurs in a specific area, the central control board and management terminal can be connected to solve the problem by modifying the DSP coefficient value even at a remote location.

Claims (5)

In the method of controlling the transmission characteristics of the analog trunk line and the station interface board of the keypad system equipped with a central control board, If country code information input by a user is received through a terminal connected to the central control board, extracting a DSP coefficient value corresponding to the country code information from the central control board; Storing the extracted DSP coefficient values in the analog trunk line and the station interface board; The analog trunk line and the station interface board operating as a board dedicated to a corresponding country according to the stored count value Transmission characteristics control method of the analog trunk line and the station interface board of the key phone system comprising a. The method of claim 1, When the country connected to the keyphone system is changed Inputting a changed country code through a user terminal connected to a central control board; The analog trunk line and extension interface of the key phone system, characterized in that for loading the DSP coefficient value according to the input country code from the memory to store in the DSP coefficient value dedicated memory of the analog trunk line and station interface board and to operate as a modified country-specific board How to control the transmission characteristics of the board. The method of claim 1, In the operation of the analog station and the trunk line board, Transmission characteristics of the analog trunk line and extension interface board of the key phone system, characterized in that by accessing the DSP coefficient value dedicated memory through the user terminal connected to the central control board, the DSP coefficient value can be modified to solve the regional characteristic problem in the country. Control method. In a key phone system, A central control board which controls the operation of the system and stores DSP coefficient values satisfying transmission characteristic specifications of each country; After downloading and storing the DSP coefficient value satisfying the national trunk line and station transmission characteristic specification of the central control board, the analog trunk line and station interface board operating as a board dedicated to the country according to the stored coefficient value Keyphone system comprising a. The method of claim 4, wherein The analog trunk line and extension interface board A DSP coefficient value dedicated memory for downloading and storing DSP coefficient values satisfying trunk line and extension transmission characteristic specifications of a corresponding country from the central control board; A key phone system comprising an interface unit including a DSP codec for impedance matching and PCM conversion of speech signals.