KR100270648B1 - Common line call system and method for pabx - Google Patents

Abstract

The present invention relates to a common line calling system and a calling method of a private switch, wherein the common line calling system includes a main CPU (11), an interprocessor communication unit (12), a tone and clock generator (13), call processing, and diagnostics. A memory 14 capable of recording operation management, initialization, etc., a digital switching unit 15 for performing a switching function of the system to provide a voice path, a DTMF receiver 16, a universal line processor 17, a subscriber In the telephone line call system including the circuit unit 18, the memory unit 14 stores a virtual program for grouping telephone lines or switching lines per line so that the main CPU 11 can virtually switch. A virtual memory is provided for assigning a switching line by designating a group for each telephone number and for searching for the next unused line if one line is in use. Under the control of the main CPU 11, 15 may provide physical highways so that switching highways may be grouped according to a virtual program stored in the memory 14 so that N: 1 switching may be performed for each highway. Characterized in that it is provided with a virtual switching circuit.

Accordingly, if only the representative phone is dialed from the outside, the communication line can be automatically connected to an empty line, thereby reducing the number of phone numbers that increase in congestion and providing an effective use of the phone number.

Description

A common line calling system of a private exchange and a method thereof.

The present invention relates to a common line calling system and a method of a private switchboard, and more particularly, a single telephone number is assigned to several telephone lines used in an enterprise or a general office to connect to an empty line only when a representative telephone is dialed from the outside. The present invention relates to a common line calling system and a method thereof.

Generally, telephone numbers of corporations and offices usually have several representative phones such as 5780, 5781, 5782, and 5783, so it is difficult to remember them, and when 5780 is busy, it is necessary to call 5781 again.

1 shows a conventional telephone line calling system. Tone & Clock Module (TCM) for supplying circuit signals for generating and supplying various tone signals used in the system as shown in FIG. Circuit unit 3, the main CPU (1) that controls the whole system to control and analyze all the data by grasping the state of the parts of the other functions mounted on the control unit, the interprocessor responsible for communication between each processor Inter Processor Communication Module 2 (IPCM), Digital Switching Module 5 (DSM), which provides the path of voice by performing the switching function of the system, and interfaces the communication between the main controller of the system and the subscriber boards. Universe that monitors and analyzes the status of the subscriber board, reports to the controller through the PB, and recognizes and processes control commands from the controller. Universal Line Process 7 (ULP), a DTMF receiver circuit (DRC; DTMF Receiver Circuit 6) that converts DTMF signals from subscriber circuits into data bits so that the system recognizes them, loads them into the system, and transmits DTMF signals. And a memory 4 capable of recording call processing, diagnosis, operation management and initialization, and a subscriber circuit unit (SLC; Subscriver Line Circuit 8) for converting digital data into voice signals and converting voice signals into digital signals.

The main CPU 1 is a main control circuit which controls various MBUS and bus signals and transmits analysis and storage commands and processing of data of the IPCM 2 and the memory 4 to each lower controller. (IPCM 2) analyzes messages coming from the DTMF receiving circuit (DRC 6), universal line processor (ULP 7), etc. while communicating with the buses of the main CPU (data bus, address bus, control bus). It handles what can be processed and the part that needs to be processed by the main CPU through the bus, receives the data analyzed by the main CPU, manages the local control circuit, and the TCM 3 generates the clock required by the system. The memory 4 is a memory circuit unit that stores programs such as the initial operation management system so that the main CPU 1 can be executed, and the call processing program RAM is also stored. The DSM 5 is controlled by the main CPU using a switching chip to switch between the TX highway and the RX highway to open the highway path, and the DTMF receiving circuit DRC 6 is a DTMF receiver circuit and a DTMF signal coming from a subscriber. Is a circuit that reports the number to the main CPU, and the universal line processor (ULP 7) monitors the state of the SLC circuit to analyze the hang on, polarity inversion, etc. SLC (8) is an A / D conversion circuit that converts analog into digital by giving a ring to a subscriber or acting as a CODEC under the control of the universal line processor (ULP) with the subscriber circuit unit. And D / A conversion circuit that converts digital to analog voice signal.

However, according to the conventional apparatus, since each switching unit of the DSM is a circuit designed to assign one telephone number to one highway, the telephone number also increases as the line is increased so that the station number is from 2 to 3 digits and the Seoul area. The number is increased to four digits, and later, the position of the telephone number system itself must be modified, and a general company or an office needs only one representative telephone number, which has a problem of increasing the number of representative telephone numbers along a line.

Accordingly, the present invention solves the above problems and groups the telephone lines used in one office or enterprise to search for and connect the unused lines to any of the grouped telephone lines, and also if the company leases and uses several lines. It is an object of the present invention to provide a common line calling system and a common line calling method that allow multiple lines to be used by a single telephone number even if a single telephone number is assigned to several lines without assigning one telephone number to a line. .

1 is a simplified block diagram of a conventional telephone line calling system;

2 is a simplified block diagram of a common line calling system according to an embodiment of the present invention;

Figure 3 is an embodiment of a common line calling method according to the present invention.

Explanation of symbols on the main parts of the drawings

11: Main CPU 12: Inter Processor Module (IPCM)

13: Tone and clock generator (TCM) 14: Virtual memory (V-MEM)

15: virtual digital switching module (V-DSM) 16: DTMF receiving circuit (DRC)

17: Universal Line Processor (ULP) 18: Subscriber Circuitry (SLC)

In order to achieve the above object, the common line calling system of a private exchange according to the present invention reads a program for calling a subscriber line and processes data necessary for program execution, and analyzes an event generated from a lower processor to control a lower processor. An interprocessor communication unit in charge of communication between the CPU and each processor, a tone and clock generation unit supplying tones and clocks to each processor, a memory capable of recording call processing, diagnostics, operation management, and initialization, and a system; A digital switching unit providing a voice path by performing a switching function, a DTMF receiving unit receiving a DTMF signal from a subscriber circuit unit and converting data bits, and monitoring and analyzing a state of a subscriber board through the interprocessor communication unit. Or control commands from the CPU to the subscriber board. A telephone line calling system comprising a universal line processor and a subscriber circuit unit for converting digital data into a voice signal and converting the voice signal into a digital signal, wherein the memory unit has a telephone number or The virtual program for grouping the switching lines for each line is stored to assign a switching line by designating a group for each telephone number, and if one line is in use, a virtual memory for searching for the next unused line is provided. A virtual switching circuit configured to provide a physical highway so that switching highways can be grouped according to a virtual program stored in the memory under the control of the main CPU to enable N: 1 switching per highway. By its features do.

In addition, a common line calling method of a private switch for achieving the above object is a telephone line calling method of a telephone line calling system, comprising: a virtual switching line grouping step of grouping a plurality of switching lines for each telephone number or line into a virtual switching group; A representative telephone number assigning step of setting a virtual path for each virtual switching group and assigning a representative number corresponding to the virtual path, a switching highway grouping step of grouping switching highways of lines belonging to the same group; When there is a call of the representative telephone number from the outside, a virtual switching program operating step of searching for an unused line belonging to the group and switching to an unused line to start a virtual switching program for connecting a call is performed.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

A circuit for generating and supplying various tone signals used in the system, the tone and clock generator 13 for supplying time signal sources synchronized with the control of the main controller, and controlling the entire system. The main CPU 11 which controls and analyzes all data by identifying the states of the parts of other functions mounted on the control unit, the interprocessor communication module (IPCM 12) that is in charge of communication between the processors, and the virtual switching function of the system. A virtual digital switching module (V-DSM; Vertual-Digital Switching Module 15) that performs multiple voice switches, bundles multiple switches at the exchange, switches into a single switching group, and provides the path of the actual voice. Interface communication between members, monitor and analyze the status of subscriber board, report to the controller through PB, and control name from the controller Universal Line Processor (ULP 17), which recognizes and processes the DTMF Receive Circuit (DRC 16), which converts the DTMF signal from the subscriber circuit unit into data bits so that the system recognizes it, uploads it to the system, and transmits the DTMF signal. Virtual memory unit (V-MEM 14), which stores virtual programs that group telephone lines or line-by-line switching lines to execute processing, diagnostics, operation management and initialization, and create virtual memory for the CPU to perform virtual switching. Subscriber circuit unit SLC 18 converts data into voice signals and converts voice signals into digital signals.

The main CPU 11 reads a program at the time of initialization in the virtual memory 14 and processes various data required for program execution to give a control command to the lower processor (IPCM, V-DSM) and an event generated from the lower processor. The IPCM 12 is generated by the local processor (DRC, ULP, etc.) while communicating with a bus (data bus, address bus, control bus) of the main CPU 11. It processes the event directly to the main CPU 11, analyzes the data from the main CPU 11 and distributes the load of the main CPU 11 by giving a control command to the local processor. The TCM 13 generates a clock required by the system to provide a clock synchronized with all circuit units. The virtual memory 14 stores call processing, diagnosis, operation management, and initialization programs. By assigning a switching line by assigning a group, for example, the seven representative lines from the existing 460-5780 to 460-5786 are designated as Virtual Switching Group 1 and the representative number is 460-5780. With 7 real numbers assigned, one phone number can be used for 7 phone lines, and if one line is used among 7 highways in a group, a virtual memory can be searched for the next empty line. A virtual program for grouping switching lines for each telephone number or line so that the main CPU 11 can perform virtual switching. rogram) is built-in.

The V-DSM 15 provides a physical highway so that switching highways can be grouped according to a program stored in the virtual memory 14 under the control of the main CPU 11 using a switching chip. N: It has a virtual switching circuit for one switching, each highway is a virtual data switching module (Vertual Data Switching Module) is connected to the subscriber circuit unit (SLC) grouped to send and receive data.

The DTMF receiving circuit DRC 16 analyzes the DTMF signal coming from the subscriber and reports the number to the main CPU 11.

The universal line processor (ULP 17) is a circuit that monitors the state of the subscriber circuit unit 18, analyzes a hang off polarity reversal, etc., raises it to a higher processor, and receives a command from the higher processor to control the subscriber circuit. .

The subscriber circuit unit (SLC 18) is controlled by the universal line processor (ULP 17) to give the subscriber a ring or CODEC A / D conversion circuit for converting analog to digital and D to convert the analog to digital audio signal It consists of / A conversion circuit and operates.

The common line calling method in the common line calling system according to the embodiment of the present invention configured as described above will be described in detail with reference to FIG. 3.

One embodiment of the common line calling method is performed by performing a virtual switching line grouping step, a representative telephone number assignment step, a switching highway grouping step, and a virtual switching program operation step.

First, a virtual switching line grouping step of grouping a plurality of switching lines into a virtual switching group for each telephone number or line is performed, a virtual path is set for each virtual switching group, and a representative number corresponding to the virtual path is assigned. Perform a representative phone number assignment step. Performs a switching highway grouping step of grouping switching highways of a line belonging to the same group, and when there is a call of a main phone number from the outside, searches for an unused line belonging to the group, switches to an unused line, and connects a call. The common line calling method is achieved by running a switching program.

As shown in Fig. 3, the lines for the telephone numbers of 460-5780, 460-5781, 460-5782, and 460-5783 are the first group, and the lines for the telephone numbers of 460-5790 and 460-5791 are the second group. As a result, the lines for phone numbers 460-8000 to 460-8999 are grouped into a third group, and there are lines for phone numbers 460-9000.

In the virtual switching line grouping step, virtual switching paths are assigned one by one for the first, second, and third cases alone. Thus, telephone numbers belonging to the same group have one virtual switching path.

In the representative phone number assigning step, the representative number of 460-5780 is assigned to the virtual switching path of the first group, the representative number of 460-5790 is assigned to the virtual switching path of the second group, and the virtual switching path of the third group is assigned. Representative numbers of 460-8000 are assigned to each other, and a self-numbering number of 460-9000 is assigned to a single line.

In the switching highway grouping step, highways of a line having the same representative number are grouped in the virtual digital switching module.

After each of the above steps is performed, a virtual switching program can be started to call only the representative telephone number from the outside, thereby switching to a line of the virtual switching group belonging to the representative telephone number to make a telephone call. Therefore, calling a phone number of 460-5780 connects to an empty line among four lines, and calling a phone number of 460-8000 searches for an empty line among 1000 lines.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and it is common knowledge in the art that various substitutions, conversions, and changes can be made without departing from the technical spirit of the present invention. It will be apparent to those who have

According to the present invention, since a general office or company using multiple lines has several extension numbers, an external subscriber dials 2 when the first telephone number is busy and presses the next telephone number when busy. It remembers only one phone number, so it prevents the inconsistency of waiting and re-calling when the call is finished, so that the phone lines used in one office or company can be grouped to find and connect unused lines to any number of grouped phone lines. If a company leases and uses a single phone number without having to assign one phone number to one line, it can use multiple lines with one phone number. To reduce the number of phone numbers It provides an effect that can be used efficiently.

Claims (3)

The main CPU 11 which reads a program for calling a subscriber line, processes data necessary for program execution, analyzes an event generated from a lower processor, and controls the lower processor, and an interprocessor communication unit 12 which is in charge of communication between the processors. Tone and clock generator 13 for supplying the tone and clock to each processor, memory 14 for recording call processing, diagnostics, operation management, initialization, etc., performs the switching function of the system to perform the path of the voice The digital switching unit 15, the DTMF receiving unit 16 that receives the DTMF signal from the subscriber circuit unit and converts the data bits, monitors and analyzes the state of the subscriber board and transmits the state to the main CPU through the interprocessor communication unit 12. Universal line processor 17 for transmitting CPU control commands to the subscriber board, converts digital data into voice signals In a telephone line calling system comprising subscriber circuitry 18 for converting a call into a digital signal, The memory unit 14 stores a virtual program that groups telephone lines or switching lines for each line so that the main CPU 11 can virtually switch, assigns a switching line by designating a group for each telephone number, A virtual memory is provided for searching for the next unused line if the line is in use; The digital switching unit 15 provides physical highways so that the switching highways can be grouped according to a virtual program stored in the memory 14 under the control of the main CPU 11, thereby providing N: 1 for each highway. A common line calling system of a private switch comprising a virtual switching circuit for switching. 2. The common line calling system of a private exchange as claimed in claim 1, wherein each highway of the digital switching unit (15) is connected to a grouped subscriber circuit unit (SLC) and configured to send and receive data. In the telephone line calling method of the telephone line calling system, A virtual switching line grouping step of grouping a plurality of switching lines into a virtual switching group for each telephone number or line; A representative telephone number assigning step of setting a virtual path for each virtual switching group and assigning a representative number corresponding to the virtual path; A switching highway grouping step of grouping switching highways of lines belonging to the same group; When there is a call of the representative telephone number from the outside, the private switch which searches for an unused line belonging to the group, switches to an unused line, and executes a virtual switching program operation step for starting a virtual switching program to connect a call. How to call a common line.