KR0156844B1 - Alarming relay method in the electronic simple switch apparatus & private switching system - Google Patents

Abstract

It is an emergency relay method of electronic simple switching system and private exchange system. To prevent call loss and interruption in case of abnormal condition of relay station, designate emergency relay station and check the state table of relay station to see if there is any problem. If there is a problem, the emergency observatories are to be substituted for the functions.

Therefore, the call loss and interruption that occurred in case of the existing relay fault can be prevented. The present invention is applied to an electronic simple exchange device and a private exchange system.

Description

Emergency relay method in electronic simple exchange system and private exchange system

1 is a hardware block diagram of a private switching system.

2 is a control flow chart for emergency relay designation of the present invention.

3 is a call processing control flowchart of the present invention.

4 is a flow chart of a relay station abnormal state detection control of the present invention.

5 is a block diagram of a subscriber table of the present invention.

* Explanation of symbols for main parts of the drawings

10: central processing unit 11: memory

12: trunk line connection circuit section 13: subscriber connection circuit section

14 tone generator 15 switching circuit portion

The present invention relates to an emergency relay method in an electronic simple exchange device and a private exchange system, and more particularly, to an electronic simple exchange device and an emergency relay method in a private exchange system that can prevent the loss and interruption of a call in the event of an error in the relay station. will be.

In general, when a telephone designated as a relay in an electronic simplified switching system and a private switching system fails to function as a relay, call loss and interruption may occur, and countermeasures are required.

The conventional call control flow will be briefly described with reference to FIG. 1. First, assuming that the extension telephone ST1 of the subscriber access circuit unit 13 is registered in the relay station, the trunk lines L9 and L10 in the normal state. The trunk line call received by the trunk line connecting circuit unit 12 through the terminal is received through the switching circuit unit 15 to the extension telephone set ST1 under the control of the central processing unit 10.

However, at this time, if the extension telephone set ST1 designated as the abnormal relay is busy, the CPU 10 controls the tone generator 14 to transmit a ring tone to the trunk line. In addition, the central processing unit 10 controls the tone generator 14 to periodically transmit an off hook ring to notify the extension telephone set ST1 designated as the relay station.

When the phone ST ends the previous call and hooks up, the call with the CO line is connected at this time.

However, when the telephone ST1 designated as the relay station cannot function as a relay station because an abnormality occurs in the extension line or a failure of the telephone itself occurs, the call of all the trunk lines or the extension subscribers is interrupted. Thus, a serious problem arises that the loss and interruption of the call is caused by the telephone designated as the relay.

Accordingly, it is an object of the present invention to provide an emergency relay method in a private exchange system that can prevent the loss and interruption of a call in the event of a fault in the relay station in view of the above problems.

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

FIG. 1 is a hardware block diagram of a private switching system, which includes a central processing unit 10 that controls call switching and various operations in the system to provide various services, and a relay station under the control of the central processing unit 10. Memory 11 for storing the data for performing various functions by accessing the number and emergency relay station number, and for switching the communication path of the trunk line and the incoming station subscriber under the control of the central processing unit 10 A switching unit 15, a tone generator 14 connected between the central processing unit 10 and the switching circuit unit 15 for supplying various tones to trunk lines and stations, and a plurality of station subscribers ST1-STN; A subscriber connection circuit 13 for interfacing between the central processing units 10 and checking the periodic signaling of the extension subscribers and applying data to the central processing unit 10; A trunk line connection circuit section 12 for detecting a ring signal coming into the lines L9 and L10 and detecting a trunk line scissors condition is configured.

2 is a control flow chart for emergency relay designation of the present invention, the emergency relay number determination process for determining whether the emergency relay station designated number if the MMC mode key input from the station subscriber connected to the station subscriber access circuit; Emergency call center number input determination process for supplying a predetermined ring tone to the corresponding extension telephone, and determining whether the telephone number is complete, if the emergency station ID number from the repeater number determination process; If the input is completed from the process, the emergency relay registration process is performed to register the emergency relay telephone number on the emergency relay table.

3 is a flow chart of a call processing control according to the present invention, in case of a trunk line, a call tone is sent to a subscriber of a trunk line, and if a call is received, a relay station steady state determination process is performed to determine whether the relay station is normal. And, if abnormal from the relay station normal state determination process, designates the relay station as an emergency relay station and turns off the emergency relay station state process to determine whether the current emergency relay station is busy and off if it is busy from the emergency relay state judgment process. Emergency relay service process to send hook ring and check if emergency relay is hook on and if it is free, send ring to the emergency relay and judge if it is off. Is done.

4 is a flow chart of an emergency relay station abnormality detection control according to the present invention, after initializing a subscriber port number, a data checking process for checking whether data of a corresponding subscriber's port number is an extension subscriber and a data checking process; If there is no input from, increase the check variable, and if the check variable is more than a certain number of times, then the abnormal state registration process for displaying an abnormality in the subscriber status table, and the check variable if there is data input from the data check process. Initialization is performed and access status of the next subscriber is checked, and an abnormal state check completion determination process is performed to determine whether the check is completed.

5 shows the structure of the subscriber table of the present invention, where 5a shows a subscriber state table. For convenience, A1 is an extension telephone port, A2 is an extension telephone port 2, and A3 is an extension telephone port 3; (5b) shows a relay table and an emergency relay table, where B1 is a relay table area and B2 is an emergency relay table area.

Hereinafter, the present invention will be described in detail with reference to FIGS. 1 to 5 based on the above-described configuration. First, the present invention is a case in which an error occurs between the relay station and the private exchange system, and thus the relay station cannot perform the role of the relay station. In other words, an emergency repeater will be designated. For example, in the case where the station subscriber ST1 is used as a relay among the plurality of station subscribers ST1-STN connected to the subscriber access circuit unit 13 of FIG. 1, the telephone of the subscriber ST1 serves as a relay station. How the central processing unit 10 knows whether an abnormal condition occurs that cannot be performed is an important problem.

The above problem is solved when the telephone of the extension subscriber ST1 is a 4-wire key phone or a digital telephone. In this description, two of the four lines are speech lines and the other two lines are data transmission / reception lines. When there is no abnormality in the data line, null data is always sent to the subscriber access circuit section 13 at predetermined intervals.

If an error occurs in the line or the telephone, the depressed data is not output to the subscriber access circuit section 13. Therefore, the central processing unit 10 checks the subscriber access circuit unit 13, and if there is an error, replaces another telephone designated as an emergency relay as a relay. It is obvious that this is important to eliminate call loss and interruption.

Referring to the emergency repeater designation registration control flow chart of FIG. 2, in step (2a), the central processing unit 10 has a subscriber who presses an MMC mode key among the station subscribers ST1-STN of the subscriber access circuit unit 13; Determine if there is. Here, the MMC mode key is a specific key generated in a key phone or a digital phone.

In step (2b), it is determined whether the MMC mode key is an ID number for designating an emergency relay.

Steps (2a) → (2b) correspond to the fraud emergency number determination process. Therefore, in step (2c), the sound of the call for entering the telephone number is heard to the corresponding subscriber. The central processing unit 10 controls the tone generator 14 to send a predetermined tone. For example, when the extension subscriber ST2 presses the MMC mode key, the caller hears the sound.

In step (2d), it is determined that the telephone number input completion authorization is completed. Step (2d) is a step of registering a telephone number in the area B2 of (5b) of the fifth step.

After the step (2g) is performed (2g) is a step of transmitting a designated registration confirmation tone. In addition, the step (2f) is to send an error sound when the telephone number input is not completed in the step (2d). Wherein (2c) → (2d) corresponds to the telephone number input determination process and (2e) → (2g) corresponds to the emergency relay registration process.

Therefore, the emergency relay station is registered in the corresponding area of B2 in (5b) of the memory 11 of FIG.

Referring to the call processing control flow of FIG. 3 when the emergency relay station is designated and registered in a predetermined area of the memory according to FIG. 2, (3a)-> (3b)-> (3c)-> (3d) is a general process. In step (3e), the CPU 10 determines whether the relay station is normal, which corresponds to the process of determining the relay station steady state.

The criterion of the step (3e) is to check whether there is an abnormal state indication in the subscriber state table area designated by the relay of FIG. For example, if the status table of the relay station designated telephone is ST1 of (5a) among the subscribers (ST1-STN), A2 is used as an emergency relay if an abnormal condition is indicated in A1.

If step (3e) is normal in step (3e), but if an abnormal condition occurs, in step (3g) the relay station is designated as an emergency relay and in step (3h) it is determined whether the emergency relay is busy.

If it is busy in step (3h), the off hook ring for notifying the incoming call is sent out in step (3i), and it is checked in step (3j) whether the emergency relay is hooked on.

If it is free in step (3h), it is checked in step (3l) whether the emergency relay is hooked off after ring transmission in step (3k), and if it is off, perform step (3m) → (3n) Will be connected. Thus, the service control flow of the emergency relay station is completed, wherein steps (3e) → (3g) → (3h) correspond to the emergency relay state determination process, and (3i) → (3n) are the emergency relay station. Corresponds to the service process.

Step (4a) of FIG. 4 is to initialize the port number of the subscriber, and step (4b) determines whether the corresponding subscriber port number is the extension subscriber of the key phone or the digital telephone and periodically checks the data in step (4c). Determine whether it is input. If data is not input periodically in step (4c), the check variable is increased by one in step (4g) and it is determined whether the check variable is more than a predetermined number of times. Will be displayed. Step (4d) → (4f) is a step for checking the next subscriber. Wherein (4a) → (4b) → (4c) corresponds to the data check process and (4g) → (4h) → (4i) corresponds to the abnormal state registration process and (4d) → (4e ) → (4f) corresponds to the abnormal state check completion decision process.

Therefore, the present invention checks the push-in data periodically output from the keyphone or digital telephone connected to the subscriber access circuit unit 13, and if there is an error in the relay station, it is immediately replaced by an emergency relay to prevent loss and interruption of the call. Will be.

As described above, the present invention has an advantage of preventing loss and interruption of a call when an abnormality occurs in a relay station.

Claims (2)

In the emergency relay method of the electronic simplified switching system and private exchange system, if the incoming line is an incoming call, the ring tone is sent to the subscriber of the trunk line. If the incoming line is an incoming call, the ring tone is sent to the station subscriber. And an emergency relay station state determination process for designating a relay station as an emergency relay station and determining whether a current emergency relay station is in a call, if it is abnormal from the normal state determination process during the relay, and from the emergency relay state determination process. If it is busy, it sends out the off-hook ring and if it is free, it checks whether it is hooked on. If it is free, it sends out the ring according to the emergency relay, and if it is off, it is determined that it is off. Electronic simple exchange device, characterized in that a large service process And emergency relay method of a private exchange system. The method of claim 1, wherein the process of determining whether the relay station is in a normal state initializes the subscriber port number, and then checks whether the subscriber's port number is inputted periodically by the extension subscriber of the keyphone or digital telephone. If there is no input from the data checking process, if one check variable is increased and the check variable is more than a predetermined number of times, an abnormal state registration process for displaying an abnormality in the corresponding subscriber status table and data input from the data checking process are performed. The emergency relay method of the electronic simplified switching system and the private switching system, characterized in that it consists of an abnormal state check completion determination process for initializing a check variable, accessing the next subscriber port number, and determining whether the check is completed.