KR920005584B1 - Calls service method by grouping - Google Patents

Abstract

If the local subscriber which is called is not free, the information table for the subscriber is searched to check whether the local subscriber is a member of a circulating group. If it is, another subscriber which is designated by the port number of the local subscriber is searched within the information table. If the other local subscriber is free, the stored data for the other party of the local subscriber is updated by writing the data of the other subscriber into it, and the call is connected to the other subscriber. On the other hand, if the other subscriber is busy, still another subscriber which is designated by the port number of the preceding other subscriber is searched.

Description

Group call service method in exchange system

1 is a block diagram of an exchange system.

2 is a conventional service flow diagram.

3 is a flow chart of the present invention.

4 is a memory map diagram for carrying out the present invention.

* Explanation of symbols for main parts of the drawings

10: central processing unit 20: ROM

30: RAM 40: internal circuit

50: switching circuit 60: tone feeder

70: ring generator 80: DTMF transmitter

90: DTMF receiver 100: trunk line circuit

The present invention relates to a call service method in an exchange system, and more particularly, to a method of allowing a station that belongs to the same group to serve on behalf of a call.

First, the configuration of a general private exchange system is as follows.

The central processing unit 10 collectively controls the overall operation of the exchange system, such as the call function or the provision of various services, and a ROM containing a program and initial service data for performing basic calls and functions. 20) a RAM 30 temporarily storing processing data in a program and data processing area, an internal circuit 40 for interfacing between systems while supplying a voice current of a voice band to a telephone of an extension subscriber; A circuit 50 for switching various tones or speech data under the control of the central processing unit 10, and a tone supply unit 60 for generating various tone signals and outputting them to the switching circuit 50. And a ring generator (70) for supplying a ring signal to the subscriber line, and a DTM for analyzing the MFC (Multi Frequency Code) generated by the subscriber and applying the corresponding digit data to the central processing unit 10. Under the control of the F receiver 80, the DTMF transmitter 90 which outputs the MFC signal under the control of the CPU 10, and the control of the CPU 10, the CO line loop is seized. And the trunk line circuit 100 for interfacing the incoming signal from the trunk line.

In a private exchange system having such a configuration, when a call is made to an arbitrary extension subscriber, the corresponding extension number may be dialed. FIG. 2 is a flowchart illustrating such a conventional call service process. A detailed operation process is as follows.

When any station subscriber in the private exchange system hooks off, the central processing unit 10 recognizes the hook-off of the station subscriber through the station circuit 40, and the tone supplier 60 in step (A1). The dial tone generated from the power supply is supplied to the corresponding subscriber station through the switching circuit 50 and the extension circuit 40. When the extension subscriber dials the first digit, the central processing unit 50 receives the first digit in step (A2) and then controls the tone supplier 60 in step (A3). Stop supplying the dial tone.

Thereafter, in step (A4), the central processing unit 10 analyzes the first digit received in step (A2) and checks whether the extension number is input for calling another extension subscriber. In the private exchange, a digit for calling, a function digit for performing an arbitrary function, and an extension digit for calling an extension subscriber are configured differently and can analyze the first digit when it is received. Therefore, in the step (A4), when a digit for making a call or performing a certain function is jumped to a routine for performing the corresponding function, the remaining extension number is received in step (A5) during a digit date and time for calling an extension subscriber. After that, in step (A6), the subscriber level is checked to see if the extension call is possible. If it is impossible to call the station as a result of the inspection, the CPU 10 proceeds to step A7 to control the tone supplier 60 to supply an error tone to the caller and terminate.

However, if the extension call is possible in step (A6), the state of the called extension subscriber is checked in step (A8). If the extension is in a free state, the CPU 10 Controlling the switching circuit 50 forms a call path between the corresponding subscribers to perform the service for the call, and when the called extension is busy, the process goes to step (A9) and the tone supplier 60 In response to the busy tone (busy tone) generated by the supply through the switching circuit 50 and the internal circuit 40 to the subscriber side informed the state of the non-call.

However, the call processing method as described above had no way to receive the call when the calling extension was not free. For example, suppose you want to talk to a department. And if the department has a household extension telephone and the calling party wants to talk to any one of the departments, the calling party dials one of the three extension numbers but the extension is busy. You have to hang up and dial another extension or wait for a while and then dial the extension again. As such, it would be very cumbersome for the calling party to continue to hang up the current call and call another extension until the call was established.

Accordingly, an object of the present invention is to provide a call service method of a group unit that allows a call to be automatically received at a station which is free among stations of the same cyclic group unless the called station is in a callable state.

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

The block structure and reference numerals of the private exchange system for carrying out the present invention are the same as in FIG.

3 shows a circular group call service process according to the present invention.

4 is a memory map diagram for implementing the present invention, where (a) is a calling party table, (b) is a subscriber information table of a ROM 20 area allocated to each extension subscriber, and a group flag area is rotated. Indicate whether or not it is a group, and in the group number area, the group number at the time of the circular group is recorded. (c) is a group table, (d) is a member table that stores extension numbers of members belonging to the same group, and (e) is a subscriber status table.

Based on the above-described configuration, the present invention will be described in detail with reference to FIGS.

A method of designating a circulation group is as follows.

To designate a cyclic group, first, a subscriber information table storing various information about each extension subscriber is stored in the ROM 20 as shown in FIG. 4 (b), and the port is circulated in the group flag area of each port. Indicate whether or not you are a member of the group, and record the group number of the circular group in the group number area. Based on the subscriber information table, a member table is stored which stores extension numbers for members in the same group as (c) and group table as shown in (c).

For example, there are any circular groups G7 and G8, and the members that constitute the circular group G7 are seven ports (P1, P2, P3, P12, P15, P18, P20) and the members that constitute the circular group G8 are five. It is assumed that the ports P4, P5, P7, P9, and P17 of the cyclic group information designation process by the group table and the member table will be described in detail. The port number Pn is a system number controlled by hardware allocated to each telephone subscriber.

While referring to the subscriber information table sequentially, the circular group information is designated by the group table and the member table. First, if the group flag indicates that the group flag is a circular group by searching the area allocated to the P1 port, the corresponding group number G7 is designated. After recognizing, P1 is stored in the group table by accessing the area having G7 as an address. Only the port number of the first subscriber of each group is stored in the group table, and the P1 port becomes the first subscriber of the G7 group. After that, the P2 port is searched again by referring to the subscriber information table. In this case, according to the above assumption, it will indicate that the group flag is a cyclic group, and the group number will be recognized as G7. When accessing the area having the address G7 in the group table, the port number P1 of another subscriber is Since it is recorded, this record is regarded as an address of the member table. That is, the P1 area of the member table is accessed to store P2. The P3 port is searched again by referring to the subscriber information table. In this case as well, the group flag will indicate that the group is a cyclic group based on the above assumption, and the group number will be recognized as G7. Therefore, if this record is regarded as an address of the member table and the P1 area of the member table is accessed, the content P2 is already stored in the area. Therefore, this time, the content of P2 is regarded as another address of the member table, and if the corresponding area is accessed, the area will be empty, and P3 will be written there.

After that, the P4 port is searched again by referring to the subscriber information table. Based on the above assumptions, the group flag will indicate that the group is a cyclic group and the group number will be recognized as G8. Therefore, when accessing the area with the address G8 in the group table, the port numbers of other subscribers will not be recorded until then. Stores P4, the first subscriber number of the G8 group. The P5 port is searched again by referring to the subscriber information table. In this case, according to the above assumption, it will indicate that the group flag is a cyclic group and the group number will be recognized as G8. When accessing the area having the address G8 in the group table, the port number P4 of another subscriber is already set. Since the record is regarded as the address of the member table, the P4 area of the member table is accessed and P5 is stored. Repeat this process to put the port number of the last subscriber (P20 for G7 group and P17 for G8 group) into the member table, and then add the corresponding group (G7) to the last subscriber port number storage of the member table. Alternatively, the first subscriber number (P1 in the G7 group and P4 in the G8 group) stored in the G8) area is recorded so that the user can cycle in the same group.

A simple example of designating a cyclic group through the above process and then performing a call service in a group unit is described. The originating subscriber P18 calls the first subscriber P2, but the first subscriber P2 is busy. And if the second subscriber P3, the next member of the same group, is free, the calling party P18 is serviced as if the second subscriber P3 is called and the counterpart of the calling party table of the calling party P18. In the number storage area, the information of the third subscriber P3 is recorded instead of the information of the second subscriber P2, and a ringing tone sounds to the third subscriber P5. 4 illustrates this example with L1,... This is a memory map that can be more easily understood using a solid line of L6, and shows a case where only one group G is set for convenience.

As shown in FIG. 3, the process of designating a cyclic group and then performing a call service in a group unit is shown in detail.

The operation process until the extension hooks off and dials the other party's extension number is the same as the above-described step (A1) to step (A8) in FIG. 2, and thus the detailed description is omitted and the above example is applied again. . If it is determined that there is a dialed extension subscriber as a result of searching the subscriber information table as shown in FIG. 4 (b) (L1), the called extension subscriber as shown in (e) in step (A8). Retrieve the state table (L2). If the called extension is in a call state as a result of the search, the subscriber information table of the called extension as shown in (b) of FIG. 4 is searched in step (B1) of FIG. Make sure is in the set state. If the reset result indicates that the reset state is not a cyclic group, the central processing unit 10 proceeds to step (A9) so that the sound generated from the tone supplier 60 is switched by the switching circuit 50 and the extension. By controlling the supply to the subscriber side through the circuit 40, the state of the non-call is notified.

However, if it is determined that the check result is set, it means that the group to which the called extension number belongs is a cyclic group, and records the maximum number of searches for finding other members in step (B2), and then proceeds to step (B3). The next member is searched for by referring to the member table shown in Fig. 4D (L4).

Thereafter, if the CPU 10 checks whether the next member is found in step (B4) in step (B4), it proceeds to step (B5) to search the subscriber state table. The state of the newly found member (the next called extension subscriber based on the call reception procedure in the circulation group) is examined (L5).

If it is determined that the call is possible, the central processing unit 10 inserts the extension number of the newly found member into the relative number storage area of the calling party table as shown in FIG. 4A (L6), By controlling the switching circuit 50 to form a communication path between the corresponding subscribers to perform the service for the call.

However, if it is determined in step (B5) that the newly found member is currently in a call or is in a state of failure or call rejection, it is determined that the call is impossible, then proceeds to step (B6) and increases the number of searches by 1 and in step (B7) Check if you searched the maximum number of times. As a result of the check, if the number of times searched so far is less than the maximum number of searches, all the extensions are not called and looping to step (B3) is performed to find the next member.

However, if it is determined in step (B4) that there is no next member or the maximum number of searches is made in step (B7), it means that all relevant extensions have been called. The generated talk sound is supplied to the called subscriber through the switching circuit 50 and the internal circuit 40 to inform the state of the non-call and ends.

As described above, according to the present invention, when the called extension is not in a callable state, other members belonging to the same group are searched sequentially from the currently called extension so that a call is made to a member who is in a callable state. There is no need to call it is convenient and there is an advantage that can make a fast extension call.

Claims (2)

An extension call service method of a private switching system having a circular group status display area and a corresponding group number storage area in a subscriber information table and having a group table and a member table, wherein the called subscriber information table is changed if the called extension subscriber is not free. Searching for and identifying whether the extension subscriber is a member of a circular group; finding another extension subscriber designated by the extension subscriber port number in the member table of the circular group when the extension subscriber is a member of the circular group; And checking the status of the other extension subscriber by searching the subscriber status table; if the other extension subscriber is free, updating the contents of the relative number storage area of the subscriber table with the other extension subscriber port number; The process of connecting a call to the subscriber And if the other extension subscriber is busy, searching for another extension subscriber specified by the other extension subscriber port number in the member table. The method of claim 1, wherein the member designation in the member table forms a smoothing loop with a series of procedures as a plurality of extension subscriber port numbers belonging to the same group.

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