KR19990001790A - Multi-switching system and method during call in private exchange - Google Patents

Abstract

The present invention relates to a private network connection of a private exchange, and more particularly, to a multi-switching system and method during a call in a private exchange that enables communication by reoccupying a trunk line and a dedicated network in a busy state.

In the conventional private exchange, only one-to-one calls can be made between the multilateral extension and the trunk line, the extension and the leased line through the existing state, and the multi-party multi-call is impossible while the call is in progress.

According to the present invention, the multi-switching unit forms the same highway path as the switching circuit unit at the time of input of the multi-switching code in the busy state, and switches the formed highway path with other call lines to make a multi-party connection. You can talk to other lines without having to listen to the contents of the mailbox and call the pager.

Description

Multi-switching system and method during call in private exchange

The present invention relates to a private network connection of a private exchange, and more particularly, to a multi-switching system and method during a call in a private exchange that enables communication by reoccupying a trunk line and a dedicated network in a busy state.

In general, as shown in FIG. 1, the configuration of a private exchange for connecting a private network includes a subscriber circuit unit 11 for mutual communication between subscribers in the premises, a trunk line circuit unit 12 for communicating with a general trunk line, and a dedicated line. A dedicated line circuit section 13 for connection, a switching circuit section 14 for maintaining highway switching between circuits, and a TSB / RSB circuit section 15 for monitoring and controlling the state of a line; And a DTRF / tone circuit section 16 for supplying DTMF and tones, and a control section 17 for processing various data signals.

Referring to the operation of the local area network access system in the conventional private exchange configured as described above, first, when a subscriber A picks up the telephone, a hang-off signal is transmitted to the TSB / RSB circuit unit 15. Store in the TSB memory provided.

Accordingly, the controller 17 reads out and analyzes the TSB signal stored in the TSB memory, and then controls the transmission sound stored in the tone memory included in the DTMF / tone circuit unit 16 to apply it to the switching circuit unit 14.

Accordingly, when the subscriber A hears the dial tone and presses the first digit, the subscriber A applies the DTMF value to the controller 17 through the DTMF / tone circuit unit 16. Accordingly, the control unit 17 analyzes the first digit and checks whether it is an extension call number or a trunk line / dedicated line. In the case of the extension, the control unit 17 receives the following second digit and the TSB / RSB circuit unit 15 receives the following digit. RSB memory provided in the control to output the ring to the corresponding subscriber station (A).

In the case of the CO line call code, the RSB memory is controlled to occupy trunks of the first and third national channels, and then the second digit is processed by the local exchange. Accordingly, when the other subscriber station B picks up the telephone, the controller 17 reads a TSB value in the TSB memory and sends a response message to the controller 17, and the controller 17 sends the response message. After analysis, the recovery message of the corresponding RSB memory is read so that the ring sent to the two subscribers (A, B) is stopped and the two subscribers (A, B) are in a call state.

In the case of the corresponding CO line / dedicated line, the inversion signal of the existing line is applied and the subscriber A and the first state are kept in the switching state when the CO line is connected, and the subscriber A and the third state is switched in the state of the dedicated line. Keep it.

On the other hand, if any of the subscribers in the subscriber circuit section 11, the trunk line circuit section 12, and the dedicated line circuit section 13 hang up, the control unit 17 analyzes the TSB memory and gives the subscriber A the other party (B). ) Sets up the corresponding tone memory as an end message indicating that the user hangs up and sends Busy Tone to subscriber A. The subscriber A listens to busy tone and hangs up the phone. Is terminated.

When the subscribers (A, B) connected to the corresponding private exchange are connected to the national exchange, the multilateral station and the trunk line, the extension and the dedicated line through the relevant country are only one-to-one, and the one-to-one, two-to-one, one-to-many multi-party multi-call Pager call and extension and other extension and trunk line, extension and trunk line and leased line, extension and other extension and leased line, extension and other extension and trunk line and other trunk line and leased line and other leased line Multiparty calls cannot be accepted.

As such, the conventional private exchange has only one-to-one communication between the multilateral extension and the trunk line, the extension and the leased line through the national language, and there is a disadvantage in that the multi-party multi-call is not possible in a busy state.

In order to solve the above-mentioned disadvantages, a multi-switching system and method during a call in a private exchange according to the present invention aims to enable communication by connecting a local network by reoccupying another line and a leased line in a busy state. do.

In addition, by making a pager call and a general subscriber of a local exchange directly while talking on a private telephone of a private exchange, a multi-party conference call can be made by directly calling a conference number with a general subscriber and an extension number connected to a private network. For the purpose of

In other words, the present invention allows a one-to-many call to be made by accessing an additional service through a corresponding trunk line network by re-occupying pager calls and trunk lines / dedicated line networks while the telephone is in use. During a call between an extension and an extension, you can make a conference call with a partner connected to the national language without interrupting the extension.If the pager rings during a call, you can listen to the contents of the mailbox and call the pager. If there is, the first and second workplaces can make a conference call with the third workplace while talking on the private network, so it is necessary to give up the story to the person at the third workplace after hanging up. The purpose is to ensure that there is no.

1 is a block diagram showing a national network connection system in a conventional private exchange.

2 is a block diagram illustrating a multi-switching system during a call in a private exchange according to an embodiment of the present invention.

3 is a diagram illustrating a connection relationship between a switching circuit unit and a multi-switching unit in FIG. 2.

4 is a flowchart illustrating a multi-switching method during a call in a private exchange according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

21: subscriber circuit portion 22: trunk line circuit portion

23: dedicated line circuit portion 24: switching circuit portion

25: TSB / RSB circuit part 26: DTRF / tone circuit part

27: control unit 28: multi-switching unit

The present invention for achieving the above object is connected to the subscriber circuit unit for connecting the call between the station subscriber, the trunk line circuit unit for connecting the call of the general trunk line, the dedicated line circuit unit for connecting the call of the dedicated line, and the signal between the respective circuit unit A private exchange having a switching circuit unit, a TSB / RSB circuit unit for monitoring and controlling a line state, and a DTMF / tone circuit unit for supplying DTMF and tones, wherein the multi-switching code for a multi-party call is applied and analyzed. A control unit which applies control data and receives and analyzes another call code during a call to apply second control data; A highway path, such as a highway path of the switching circuit unit, is formed according to the first control data applied from the controller, and a highway path corresponding to the call code is formed on the formed highway path according to the second control data applied from the controller. It comprises a multi-switching unit for connecting the multi-party call by switching to each other.

In addition, the multi-switching method during the call in the private exchange according to the embodiment of the present invention for achieving the above object is applied to the multi-switching code for the multi-party call after confirming the call state maintained through the highway path of the switching circuit unit A first step of confirming whether it is possible; A second process of converting the highway path of the switching circuit part into the highway path of the multi switching part after reading and analyzing the multi switching code; A third step of maintaining the confirmed call state through the highway path of the multi-switching unit and confirming that a call code is applied; A fourth step of switching the highway path maintained in the multi-switching unit and the highway path corresponding to the call code after reading and analyzing the call code; And a fifth process of setting a RSB memory corresponding to the call code and looping a line to make a multi-party call.

Hereinafter, with reference to the accompanying drawings will be described as follows.

FIG. 2 is a block diagram illustrating a multi-switching system during a call in a private exchange according to an exemplary embodiment of the present invention. FIG. 3 is a diagram illustrating a connection relationship between a switching circuit unit and a multi-switching unit in FIG. 2, and FIG. A flowchart illustrating a multi-switching method during a call in a private exchange according to an embodiment of the present invention.

In the private switching system according to the embodiment of the present invention, the configuration of the multi-switching system during a call is illustrated in FIG. 2, wherein the subscriber circuit unit 21 for mutual communication between subscribers in the premises and the trunk line circuit unit 22 for talking with a general trunk line ), A dedicated line circuit section 23 for connecting a dedicated line, a switching circuit section 24 for signal connection between each circuit, a TSB / RSB circuit section 25 for monitoring and controlling line status, DTMF and a tone DTMF / tone circuit section 26 for the purpose of doing so.

In addition, the present invention further comprises a control unit 27 and a multi-switching unit 28 for the multi-party call. However, the control unit 27 controls operations for general call connection of all the circuit units 21 to 26, checks the current call state through the highway path of the switching control unit 24, and multi-switches for the multi-party call. After the code is authorized and analyzed, first control data for converting the call state into the highway path of the corresponding multi-switching unit 28 is applied, and while maintaining the call through the highway path of the multi-switching unit 28. The second control data for authorizing and analyzing the different call codes is applied to the conference. The multi-switching unit 28 forms the same highway path as the highway path of the switching circuit unit 24 according to the first control data applied from the control unit 27 and is applied from the control unit 27. According to the control data, the highway path corresponding to the call code is mutually switched to the formed highway path to make a multi-party call.

In addition, the multi-switching unit 28 loops the lines transmitted and received by the switching circuit unit 24 to the multi-switching unit 28. As shown in FIG. 3, data for switching is controlled by recording a data value to control the transmission highway and the reception highway. To provide a bus, an address bus for managing the address of the data bus, a receiving line of various clocks for allocating time slots, a transmission highway for providing a transmission voice path between subscribers, and a receiving voice path between subscribers. Loops the receiving highway for the switching circuit section 24 and the multi-switching section 28, and connects a first control bus to the switching circuit section 24 for overall control of data reading, writing, needle selection, and the like. And a second control bus connected to the multi-switching unit 28.

In the private exchange according to the embodiment of the present invention, the multi-switching system during a call performs an operation as shown in the flowchart of FIG. 4, and the basic operation description is the same as that of the related art, and thus, only the case for the multi-party multi-switching is omitted. Explain.

When a first subscriber A calls to the extension, trunk line, or leased line, the control unit 27 controls the switching circuit unit 24 to maintain a call state according to the call codes of the extension, trunk line, and leased line. The control unit 27 checks the call code that maintains the current call state (step S1).

First, if the call code of the call state currently maintained in the first step S1 is the first subscriber A and the second subscriber B between the extension and the extension, that is, the first subscriber A If the second subscriber B is busy, if one of the two subscribers A and B is to be connected to the trunk line circuit 22 when the first subscriber wants to talk to the trunk line subscriber, the first subscriber is connected. To do so, press the multi-switching code of the station to Japan line. Then, the control unit 27 confirms whether the multi-switching code of the corresponding line-to-column line is applied (step S2), and reads the multi-switching code of the corresponding line-to-line line through the DTRF memory of the DTRF / tone circuit unit 26. After the analysis (step S3), the highway path of the switching circuit unit 24 to which the two subscribers A and B are connected is converted to the highway path of the multi-switching unit 28 (step S4). ).

At this time, the control unit 27 waits for the input of the CO line call code, and maintains the call state of the two subscribers A and B through the highway path of the multi-switching unit 28. When the subscriber who pressed the multi-switching code of the toll-to-one trunk line of the two subscribers A and B presses the corresponding CO line call code, the control unit 27 checks whether the corresponding CO line call code is applied (step S5). Read and analyze the corresponding CO line call code (step S6) and control the multi-switching unit 28 to switch the highway paths of the two subscribers A and B and the highway path of the first established subscriber to each other (step S6). S7).

The control unit 27 also sets the RSB memory of the trunk line circuit unit 22 to loop with the laying side (step S8).

In this way, the two extension subscribers A and B and the first established subscriber of the trunk line are switched by the multi-switching unit 28 to make a call.

Secondly, if the call code of the call state currently maintained in the first step S1 is the first subscriber A and the first established subscriber between the extension and the trunk line, that is, the first subscriber A and the first subscriber. If the subscriber is in a call, the first subscriber A is to call the second subscriber connected to the trunk line circuit 22 when attempting to talk with another subscriber over the second station. Press the multi switching code of. Then, the control unit 27 checks whether the multi-switching code of the corresponding line to CO line is applied (step S9), and reads the multi-switching code of the corresponding line to CO line through the DTRF memory of the DTRF / tone circuit unit 26. After the analysis (step S10), the highway path of the switching circuit unit 24 to which the first subscriber A is connected to the first local subscriber is switched to the highway path of the multi-switching unit 28 (step S11).

At this time, the control unit 27 waits for the input of the CO line call code, and maintains the call state between the first subscriber A and the first established subscriber via the highway path of the multi-switching unit 28. Then, when the first subscriber A presses the corresponding CO line call code, the controller 27 checks whether the corresponding CO line call code is applied (step S12), reads and analyzes the CO line call code (step S13). The multi-switching unit 28 controls to switch the highway path of the first subscriber A, the first subscriber and the highway path of the second subscriber (step S14).

The control unit 27 also sets the RSB memory of the trunk line circuit unit 22 to loop with the laying side (step S15).

In this way, the first subscriber A of the extension and the first and second established subscribers of the two trunk lines are switched by the multi-switching unit 28 to make a call.

Thirdly, if the first subscriber A and the first established subscriber are in a call as in the case where the call code of the call state currently maintained in the first step S1 is the second case, the third establishment is performed. When the first subscriber A wants to talk to the leased line subscriber through the terminal, the first subscriber A presses the multi-switching code of the line-to-one line-to-one leased line to call the third national subscriber connected to the leased line circuit section 23. Then, the control unit 27 checks whether the multi-switching code of the corresponding line to Japan line to line dedicated line is applied (step S16), and through the DTRF memory of the DTRF / tone circuit unit 26 of the line to Japan line to line dedicated line. After reading and analyzing the multi-switching code (step S17), the highway path of the switching circuit unit 24 to which the first subscriber A is connected to the first subscriber is connected to the highway path of the multi-switching unit 28. Is switched to (step S18).

At this time, the control unit 27 waits for the input of the leased line calling code, and maintains a call state between the first subscriber A and the first established subscriber via the highway path of the multi-switching unit 28. When the first subscriber A presses the dedicated line call code, the control unit 27 checks whether the corresponding dedicated line call code is applied (step S19), reads and analyzes the dedicated line call code (step S20). The multi-switching unit 28 controls to switch the highway paths of the first subscriber A, the first local subscriber and the highway path of the third national subscriber (step S21).

The control unit 27 also sets the RSB memory of the dedicated line circuit unit 23 to loop with the dedicated side (step S22).

In this way, the first subscriber A of the extension, the first national subscriber of the trunk line and the third national subscriber of the leased line are switched by the multi-switching unit 28 to make a call.

Fourth, if the call code of the call state currently maintained in the first step (S1) is the first subscriber A and the third national subscriber between the extension and the dedicated line, that is, the first subscriber A and the third subscriber. If the local subscriber is busy, the first subscriber A is to call the fourth domestic subscriber connected to the dedicated line circuit unit 23 when trying to talk to another leased line subscriber through the fourth national connection. Press the multi switching code of. Then, the control unit 27 checks whether the multi-switching code of the corresponding day-to-day dedicated line is applied (step S23) and reads the multi-switching code of the corresponding day-to-day dedicated line through the DTRF memory of the DTRF / tone circuit unit 26. After analysis (step S24), the highway path of the switching circuit unit 24 to which the first subscriber A and the third national subscriber are connected is switched to the highway path of the multi-switching unit 28 (step S25).

At this time, the control unit 27 waits for the input of the leased line calling code, and maintains the call state between the first subscriber A and the third national subscriber via the highway path of the multi-switching unit 28. When the first subscriber A presses the dedicated line call code, the control unit 27 checks whether the corresponding dedicated line call code is applied (step S26), and reads and analyzes the dedicated line call code (step S27). The multi-switching unit 28 controls to switch the highway path of the first subscriber A and the third national subscriber and the highway path of the fourth national subscriber to each other (step S28).

The control unit 27 also sets the RSB memory of the dedicated line circuit unit 23 to loop with the dedicated side (step S29).

In this way, the first subscriber A of the extension and the third and fourth national subscribers of the two dedicated lines are switched by the multi-switching unit 28 to make a call.

Fifth, if the call code of the call state currently maintained in the first step (S1) is the first subscriber A, the first national subscriber and the third national subscriber between the extension, the trunk line and the leased line, that is, the first If the subscriber A, the first national subscriber and the third national subscriber are in communication with each other, the first subscriber A is connected to the dedicated line circuit unit 23 in the case of trying to speak with the fourth national subscriber through the fourth national subscriber. Press the multi-switching code of the Japan-to-Japan dedicated leased line to call the established fourth national subscriber. Then, the control unit 27 checks whether the multi-switching code of the corresponding single line to single line carrier line is applied (step S30) and through the DTRF memory of the DTRF / tone circuit unit 26 of the corresponding line to single line carrier line. After reading and analyzing the multi-switching code (step S31), the highway path of the switching circuit unit 24 to which the first subscriber A, the first national subscriber, and the third national subscriber are connected is connected to the multi-switching unit ( 28) and the highway route (step S32).

At this time, the controller 27 waits for the input of the leased line calling code, and the call state of the first subscriber A, the first national subscriber, and the third national subscriber is communicated through the highway path of the multi-switching unit 28. Will be maintained. When the first subscriber A presses the dedicated line call code, the control unit 27 checks whether the corresponding dedicated line call code is applied (step S33), reads and analyzes the dedicated line call code (step S34). The multi-switching unit 28 controls to switch the highway paths of the first subscriber A, the first national subscriber and the third national subscriber and the highway path of the fourth national subscriber to each other (step S35).

The control unit 27 also sets the RSB memory of the dedicated line circuit unit 23 to loop with the dedicated side (step S36).

In this way, the first subscriber A of the extension, the first national subscriber of the trunk line and the third and fourth national subscribers of the two leased lines are switched by the multi-switching unit 28 to make a call.

As described above, the multi-switching unit forms the same highway path as the switching circuit unit at the time of the input of the multi-switching code in the busy state, and switches the formed highway paths to other call lines so as to make a multi-party connection. You can talk to other lines without hanging up the line you're on, or listen to the contents of your mailbox and make pager calls during the call.

Claims (2)

Subscriber circuit portion 21 for connecting calls between extension subscribers, trunk line circuit portion 22 for connecting calls of general trunk lines, dedicated line circuit portion 23 for connecting calls for dedicated lines, and corresponding circuit portions 21, 22, and 23 In the private exchanger comprising a switching circuit section 24 for connecting signals between the terminals, a TSB / RSB circuit section 25 for monitoring and controlling the line state, and a DTMF / tone circuit section 26 for supplying DTMF and tones, A control unit 27 receiving and analyzing a multi-switching code for a multi-party call and applying first control data, and receiving and analyzing another call code during a call to apply second control data; A highway path, such as the highway path of the switching circuit unit 24, is formed according to the first control data applied from the controller 27, and the highway path is formed according to the second control data applied from the controller 27. And a multi-switching unit (28) for connecting a multi-way call by mutually switching the highway path corresponding to the call code. A first step of checking whether a multi-switching code for a multi-party call is applied after checking a call state maintained through a highway path of the switching circuit unit 24; A second step of converting the highway path of the switching circuit unit 24 into the highway path of the multi-switching unit after reading and analyzing the multi-switching code; A third step of maintaining the confirmed call state through the highway path of the multi-switching unit 28 and confirming that a call code is applied; A fourth step of switching between the highway path maintained in the multi-switching unit 28 and the highway path corresponding to the call code after reading and analyzing the call code; And a fifth process of setting a RSB memory corresponding to the call code so as to loop a line to make a multi-party call.