KR940006518B1 - Call switching method in pabx - Google Patents

Abstract

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Description

Call processing method of private exchange system

1 is a block diagram of a private exchange system for carrying out the present invention.

2 is a flowchart illustrating call processing at the time of an external call.

3A and 3B are flowcharts of call processing in implementing the intercom function.

4 is an intercom arrangement of executive and secretary telephones.

5 is a memory map configuration diagram for performing the present invention.

* Explanation of symbols for main parts of the drawings

10: central processing unit 11: memory

12 interface unit 13 switching circuit

14: subscriber circuit 15: digital subscriber circuit

16: trunk line circuit 17: tone supply circuit

18: DTMF Receiver 19: DTMF Center

The present invention relates to a call processing method of a private exchange system, and more particularly, to a method capable of efficiently performing a call processing of a particular subscriber in a private exchange system.

In general, private subscribers (hereinafter referred to as "executives") and counterparts (hereinafter referred to as "secretaries") are connected by 1: 1.

FIG. 1 is a general system configuration diagram of a private exchange, and the central processing unit 10 controls call switching according to the state of originating and incoming calls, and processes to provide various functional services. The memory 11 stores a program and initial service data so that the central processing unit 10 can perform basic call and awakening functions, and the central processing unit 10 executes a program. It consists of RAM that temporarily stores the generated data. The interface unit 12 switches various tone signals, dial signals, and audio signals under the control of the exchange system and the central processing unit 10 as a control unit. The subscriber circuit 14 is connected to a general telephone, and supplies a call current to the telephone and performs an interfacing function between the switching system and the telephone period. A digital line interface (DLI) 14 is connected to a digital phone (hereinafter referred to as TGP) and performs interfacing between the switching system and the DGP under the control of the central processing unit 10. The trunk line circuit 16 is connected to the public telephone network (PSTN) via a trunk, and performs the interface between the public telephone network and the switching system under the control of the central processing unit 10. The tone supply circuit 17 Various tone signals are generated and output to the switching circuit 13 under the control of the CPU 10.

The DTMF receiver 18 receives the DTMF dial signals generated from the subscriber circuits 14 and 15, converts them into digital data, and outputs them to the CPU 10. The DTMF center 19 converts the digital data output from the central processing unit 10 into a DTMF signal and outputs the DTMF signal.

In the private exchange having the above configuration, the executive and the secretary are connected to 1: 1 to implement an intercom (INTERCOM) function. That is, it can be grouped with only one secretary of one executive, and one secretary can be grouped with one executive, so that the call that is received by the secretary can be connected to only one grouped executive. Thus, if there are several executives, the secretary will not be able to connect calls to each executive. In addition, if the secretary is busy, the incoming call cannot be connected to the executive. When the secretary is busy, the assistant cannot connect the call. Can't give

Therefore, the purpose of the present invention is to group a large number of executives and secretaries in a private exchange system, so that incoming calls from the public telephone network or incoming calls to the executives can be received by any of the grouped secretaries. In providing a method.

The purpose of the present invention is to provide a method for grouping a number of executives and secretaries in a private exchange system and registering them in the executive secretary table.

Another object of the present invention is to provide a call processing method that enables intercommunication between a plurality of executives and secretaries using the executive secretary table in a private testicular system.

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

The system configuration of the private exchange for carrying out the present invention is configured as shown in FIG. 1, and the same reference numerals are used.

FIG. 2 shows a selection of secretaries who can connect using a management secretary table (hereinafter referred to as "MGSETB") when an incoming call originates from a public telephone network according to the present invention. It shows the process of connecting to the secretary.

FIG. 3A illustrates a process in which an assistant secretary forms an executive registered with the MGSETB when an assistant intercoms with a specific executive.

FIG. 3B illustrates a process in which an executive searches for secretaries registered in the MGSETB when intercoming with a specific secretary and forms a call.

4 is an arrangement diagram of intercom keys I1-I4 arranged in the DGP of the executive and secretary. In the present invention, one executive may form a group with four secretaries, and one secretary may form a group with four executives. Assume that there is.

FIG. 5 is a block diagram of a memory map for carrying out the present invention. In FIG. 5A, when a group is formed as shown in FIG. 4, MGSETB includes port numbers of four executives and four secretaries. ) Is a buffer MSGB (message buffer) that registers a message generated when an intercom key is received. The flag is set when an intercom key flag (ICF) is received. PTNO is a port number of the executive or secretary who pressed the intercom key. It is the port number of the secretary or executive corresponding to the intercom key. Thus, PTNO becomes the calling party port number and ICNO becomes the called party port number.

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

In order to perform a call service by grouping multiple executives and secretaries, the executives and secretaries are grouped and registered in MGSETB. In the MGSETB, the executive and secretary port numbers are recorded. The group numbers are determined by the grouping order at the initial position. Thus, when registered in MGSETB as shown in (5A) of FIG. 5, the first secretaries of the executives MG1-MF4 become SE1-SE4, and the respective first executives of the secretaries SE1-SE4 become MG1-MG4, respectively. In addition, the second secretary of the executive MG1-MG4 becomes SE2, SE3, SE4, SE1, and the second secretary of the secretary SE1-MG4 becomes MG4, MG1, MG2, MG3, respectively. Therefore, the priority of the executives of the executive MG1 is SE1 → SE2 → SE3 → SE4, and the priority of the secretaries of the secretary SE1 is MG1 → MG4 → MG3 → MG2.

The MGSETB is a table for linking a plurality of executives and secretaries so that they can call each other. The intercom keys I1-I4 use a programmable key during installation.

First, in the auto mode, do as follows.

"MMC mode → 0 → desired key → autodial code (31-62) → MMC mode" In addition, the autodial value is entered as an intercom code and a group number (graup NO). "MMC mode → 1 → desired key → intercom code (= hold key) → group number (1-4) → MMC mode" In this case, if you want to implement the intercom key I1-I4 function using another key, set the desired key to auto dial mode. Change the data to ROM, input intercom code and group number, and change ROM data.

In this way, if the group number of executives and secretaries are grouped and registered in MGSETB, calls from outside can be sent to the secretary, and mutual calls are made with intercom keys I1-I4. It is possible to call each other with intercom key I1-I4 between executive and secretary mutual.If intercom key is generated while the executive or secretary is in an incoming call and call state, the incoming call is held by the intercom key and can make intercom call. If the other party is busy when intercom call is requested, it supplies ring for incoming call and flashes the call wating lamp.

First, the process of processing incoming call from the outside is examined. When an incoming signal is generated from the outside through the trunk line circuit 16, the CPU 10 recognizes that the trunk line is in a state of receiving in step 201, and checks whether the incoming signal is in midrange in step 202. At this time, if the incoming call is not midrange, the same process is performed during general call processing. However, when the incoming call calls the executive, in step 203, the contents of the MGSETB are accessed from the memory 11 to check whether the secretaries for the executive are registered. At this time, in step 203, secretaries for the corresponding executive are registered in the MGSETB, and in step 204, after accessing the first secretary signal Port NO of the corresponding executive registered in the MGSETB, in step 205 Checks if the assistant is busy. At this time, if the secretary is busy in step 205, the secretary port number is increased in order to access the next secretary number belonging to the executive in step 206, and the next secretary is repeatedly performed by repeating steps 203 to 205. Access the number to determine the status of the secretary. In step 205, if the secretary is not in a busy state, the ring data is transmitted to the DGP of the selected secretary in step 207. In this case, when the secretary LGP is hacked off, a call path is formed between the secretary and the calling party subscriber, thereby forming a call path with the executive.

Looking at the incoming call processing process with reference to MGSETB of (5A), when an incoming call for midrange MG1 is generated from outside, the central processing unit 10 recognizes that midrange MG1 is registered in MGSETB in step (203). After accessing the port number of the first secretary SE1 in step 204, the state of SE1 is checked in step 205. At this time, if the SE1 is in the idle state, the ring is supplied to the SE1 in step 207. When the SE1 hooks off, a call path is formed between the calling party and the SE1.

However, if SE1 is busy in step 205, the second secretary SE2 belonging to executive MG1 is accessed by repeating steps 203 and 205 after accessing the next secretary number information in step 206. -Check the status of the fourth Secretary SE4.

As described above, when an incoming call is generated from the outside and the secretary needs to give an incoming call to the executive, or implements an intercom function between the secretary and the executive, the same procedure is performed as in FIGS. 3A and 3B.

First, the process of searching for the augmentation number by pressing the intercom key of the secretary will be described with reference to FIG. 3A. When any intercom key among the intercom keys I1-I4 of the secretary DGP is pressed, the CPU 10 recognizes this in step 301, sets an ICF of MSGB such as 5B, and the secretary's port corresponds to the PINO. Record the number and record the intercom key number in ICND. In step 302, it is checked whether there is a midrange in MGSETB such as 5B, and if there is a midrange corresponding to the received intercom key in step 303, it is checked. In this case, if the executive is a desired executive corresponding to the received intercom key in step 303, the manager checks whether the executive is a DGP subscriber, and if it is DGP, accesses the port number for the executive in MGSETB. Register at In addition, in step 303, if the desired executive is not the same, the processes are repeated through steps 306 and 307 to select the desired executive registered in the MGSETB.

Thereafter, the corresponding call is processed according to the selected state of the executive. When the assistant in the idle state calls the executive to perform the intercom function, the central processing unit 10 receives the ring data indicating the incoming call of the digital subscriber. Output to the corresponding mid port of circuit 15. In this case, the ring data is data that is turned on and off in a 0.2 second cycle. In addition, the central processing unit 10 controls to display "SECRCTARY" by the display unit (LED) of the executive LGP, and controls to display "MANAGER" with the number of the corresponding executive by the display unit of the assistant DGP.

Secondly, when the secretary calls the corresponding executive to switch the incoming call, the central processing unit 10 controls the switching circuit 13 to transfer the incoming call to the hold state when the call is in progress with the secretary and the corresponding executive secretary To form an intercom communication path. At this time, the central processing unit 10 transmits the pending music to the incoming call subscriber in the hold state, and controls the intercom and LED of the executive and secretary in the intercom call. When the intercom key corresponding to the intercom LED whose executive board flashes after the intercom call is pressed, the CPU 10 controls the switching circuit 13 to form a call path between the subscriber who pressed the intercom key and the pending subscriber and flashes. Turn off the LED.

Thirdly, if the secretary calls the executive while the executive is on the line, it will provide incoming call ring data and flash the alert lamp. At this time, the incoming call recognition ring data is supplied as a busy ring at 0.5 second intervals.

The above process is assumed assuming that SE4 calls MG1 in MGSETB of (5a). This case corresponds to the case where SE4 like FIG. 4 presses intercom key I4. Then, in step 301, IGB is set in MSGB such as 5B, the port number of SE4 is recorded in PTNO, and I4 key data is recorded in ICNO. Thereafter, the CPU 10 repeats steps 302, 303, 306, and 307 to find the midrange MG1 corresponding to the I4 key by referring to the contents of the MSGB. In step 305, after recording the port number for the MG1, the state of the MG1 is examined to process the corresponding call.

First, when SE4 calls MG1 in the idle state, the central processing unit 10 supplies the ring data to MG1, displays "SCRETARY" on the display of MG1, and "MANAGER" on the SE4 with the number of MG1. Illustrated.

Secondly, when the SE4 wants to switch the incoming call to MC1, the CPU 10 controls the switching circuit 13 to transition the incoming call subscriber who was talking to the SE4 to the hold state and intercoms between the SE4 and the MG1. At the same time, the intercom LED blinks.

During the intercom call, when the intercom key corresponding to the LED flashing MG1 or SE4 is pressed, the central processing unit 10 controls the switching circuit 13 to disconnect the intercom call path and disconnect the intercom call pending subscriber and intercom key. Form a currency path between the pressed DGP.

If the SE4 calls MG1 while the MG1 is in a call, the MG1 will send ring receipt data to the MG1 every 0.5 sec.

Secondly, the process of searching for the secretary number by pressing the intercom key of the executive will be described with reference to FIG. 3B. When any intercom key of intercom key I1-I4 of the executive DGP is pressed, the central processing unit 10 recognizes this at step 351 and sets the ICF of the MSGB such as 5B, and the port of the corresponding midrange to the PINO. Record the number and record the intercom key number received by ICND. In step 352, it is checked whether there is a secretary in MGSETB such as 5B. In step 353, it is checked whether the secretary corresponds to the received intercom key. In this case, if the secretary is a desired secretary corresponding to the received intercom key in step 353, the secretary checks whether the secretary is a DGP subscriber. In step 354, the port number for the executive is accessed from MGSETB. Write on. If the secretary is not the secretary in step 303, the processes are repeated through steps 306 and 307 to select the secretaries registered in the MGSETB.

Thereafter, the corresponding call is processed according to the state of the selected secretary. The call processing is performed in the same manner as the call processing of the executive.

As described above, in order to improve the intercom call function between the executive and the secretary in the fact exchange system, a plurality of connectable subscribers can be registered to one subscriber to have priority, thereby grouping the executives and secretaries. When an incoming call occurs, by identifying the secretary status according to the priority of the grouped table to form a call path, even if the secretary is in a busy state, the incoming call to the executive may be connected to the corresponding executive. One-touch function allows you to call any executive or secretary to perform intercom functions efficiently. In particular, even if the executive or secretary called during the intercom is in a busy state, the call state can be notified through the ring and display unit, so that the call service can be efficiently performed.

Claims (2)

1. A call processing method of a private switching system having a digital telephone having a plurality of intercom keys to service a call between an executive and a secretary, wherein the call processing method receives an intercom key and a group number generated in the program mode and is located at a corresponding group number position. Registering the executive secretary group table having priority by sequentially grouping the received key data to correspond, and sequentially receiving the executive secretary group table according to the priority upon receiving any intercom key for executive call from a secretary digital telephone. And selecting an executive number corresponding to the incoming intercom key, and forming an intercom call path during the called executive digital telephone period with the secretary digital telephone and receiving an arbitrary intercom key for the secretary call from the executive digital telephone. The senior secretary group table in order of priority And sequentially selecting the secretary number corresponding to the received intercom key, and then forming an intercom call path during the midrange digital telephone call of the midrange digital telephone. In the call processing method of a private instructor system having a senior secretary table that registers port numbers of each secretary to form an intercom call path with a plurality of secretaries, when receiving an incoming call to a specific executive from the outside, Supplying an incoming ring signal to the secretary's digital telephone having the highest priority among the secretaries in the idle state by sequentially checking the state of the secretaries in the executive secretary group table, and from the secretary digital transfer machine Suspending the incoming call subscriber upon receiving an intercom key corresponding to an arbitrary executive and forming an intercom call path between the assistant digital telephone and the executive digital telephone; and forming the intercom call route from the executive digital telephone during the intercom call. When the incoming call subscriber corresponding to the telephone receives the incoming call subscriber Call processing method of the PBX system, characterized by constituted by any process of forming a group call in a digital telephone executive period.