KR100252510B1 - Method of receiving a call to the information desk - Google Patents

Abstract

PURPOSE: A method for re-receiving an attendant console call of a full electronic exchange is provided to make an originating call received in other attendant console included in the same group as an optional attendant console, when the optional attendant console is not capable of re-receiving the originating call. CONSTITUTION: If an originating call is not re-received in the first attendant console registered in one of many groups, a full electronic exchange decides whether other attendant(second attendant console) is registered in the group where the first attendant console is registered. If so, the full electronic exchange decides whether the second attendant console is capable of receiving the originating call. If so, the full electronic exchange makes the originating call received in the second attendant console. If the second attendant console is not registered in the corresponding group, the full electronic exchange delivers a busy tone to a terminal of an originating subscriber.

Description

Method of receiving a call to the information desk in the digital switching system

The present invention relates to a guide call reentry method of an electronic switchboard, and particularly, when an originating call cannot be rerouted according to an arbitrary guide, the calling call can be received according to the guide and other guides belonging to the same group. The present invention relates to a method for re-establishing a reception call of an electronic exchange.

In general, electronic switchboards are equipped with packet switching functions and comprehensive information to provide a wider range of voice and non-voice information communication services through matching not only telephones but also video phones, video tex, facsimile, telex, computers, televisions and various private switching networks. ISDN (Integrated Services Digital Network) is being developed to accommodate advanced network functions such as subscriber access functions, value-added service functions, and mobile communication exchange functions.

FIG. 1 is a structural diagram of a general electronic switch, wherein the electronic switch is composed of three sub-systems: an Access Switching Subsystem (ASS), an Interconnection Network Subsystem (INS), and a Central Control Subsystem (CCS).

The ASS includes a subscriber and trunk line interface, a T-switch, an Asynchronous Transfer Mode (ATM) switch, a frame relay handler, an optical subscriber interface, various signaling devices, a packet handler, and the like. It performs call processing function, self operation and maintenance function. The transmission medium with the INS is an optical link, also called a data link. It accommodates ISDN subscriber interface, No.7 signaling device, frame relay handler, packet handler function and PCS (Personal Communication Service), ATM, optical subscriber access device.

In addition, the ASS is ASS-S (Subscriber), ASS-T (Trunk), ASS-S / T (Subscriber / Trunk), ASS-7 (No.7), ASS-P (Packet), ASS -I (ISDN), ASS-ATM, ASS-F (optical subscriber access device), ASS-PCS, ASS-FR (Frame Relay) and the like may be used in combination.

The INS is located at the center of the system and performs a function of connecting ASS to each other or between ASS and CCS. Point-to-point data links between the INS and the ASS provide communication between the INS and each ASS (information exchanged between subscribers or for use within the system). The INS end of the data link is referred to as a space switch data link (SSL), the ASS end is referred to as a time switch link (TSL), and a link exists for a control action between the CCS and the INS. In addition, the switch network is based on the T-S-T switch structure, the space (S) switch is located in the INS, the time switch (T) or ATM switch is accommodated in the ASS.

In addition, the INS performs a centralized function such as a space switch connection among the call processing functions, and has a network synchronizer to generate and distribute a system clock.

The CCS performs the overall operation and maintenance of the system. In addition to system level operation and maintenance, management, and statistical functions, it performs mass storage media (MT, disk) control management, various input / output statement control with the operator, and interworking with other systems.

On the other hand, the switchboard (national exchange) is to group some or all of the subscribers connected to the same switchboard in order to provide the subscribers with various functions that were provided only in the private exchange, and any subscriber in each group Introduced the CENTRALized EXchange (CENTREX) feature, which allows users to call other subscribers in the same group using only the extension dial.

FIG. 2 is a diagram illustrating a connection state between a conventional electronic switch, a reception desk, and a subscriber in which a CENTREX function is introduced. A part or all of the subscribers connected to the same electronic switch are integrated into a plurality of CENTREX groups, and a maximum of one CENTREX group is included. Up to 10 guides are registered to perform the guide function for the group. More specifically, up to 1000 CENTREX groups may be accommodated in one electronic exchanger, and only one CENTREX group is shown in FIG. 2.

The subscribers registered in the CENTREX group are divided into several levels, so that some subscribers are restricted from calling outside the CENTREX group, and some subscribers can receive special services (multiple calls, etc.) in addition to the services basically provided by the CENTREX group. Among them, the guide is a device that provides a variety of services for low-grade subscribers of which outbound calls are limited.

In addition, the information desk is provided with a terminal equipped with a key panel, a monitor screen, and the like, and the receptionist working at the information desk responds to the inquiries related to the subscriber's telephone number, billing data or other phone calls using the information desk terminal. The company provided various services and managed the CENTREX group.

On the other hand, the call from the outside could be connected to the internal subscriber who requested the call only through the guide registered in the relevant CENTREX group. If the internal subscriber did not answer, the originating call would be re-routed according to the guide, and the receptionist's guide would provide the calling external subscriber with a notification that the called party did not respond.

However, conventionally, when an information desk calls an internal subscriber and the user cannot receive a call or becomes unable to answer a call, the call should be re-answered if the originating call needs to be re-answered by the internal subscriber's non-answer. There is a problem that causes inconvenience to the external subscriber because it rejects and sends a call sound to the calling party's external subscriber.

The present invention has been made to solve the above problems, the convenience of the subscriber by allowing the originating call to be received according to the other guides belonging to the same group as the guide when the outgoing call can not be re-directed according to any guide The purpose of the present invention is to provide a method for re-establishing a reception call of an electronic switching system capable of promoting the transmission.

In order to achieve the above object, the guide recalling method of an electronic switchboard according to the present invention has subscribers divided into a plurality of groups, and at least one guide board is registered in each group. 1. A call rerouting method, comprising: a first step of determining whether another guide is registered in a group in which the first guide is registered if the originating call is not re-called according to the first guide registered in one of the plurality of groups; A second step of determining whether the second guide is in a state capable of receiving a call if another guide (hereinafter, referred to as a second guide) is registered in the corresponding group as a result of the determination of the first step; If the second guide is in a state capable of receiving a call as a result of the determination of the step is provided with a third step of forwarding the outgoing call according to the second guide The features.

In addition, the present invention preferably further comprises the step of transmitting a call sound to the terminal of the calling party subscriber is not registered in the corresponding group as a result of the first step.

1 is a structural diagram of a general electrical exchanger,

2 is a diagram illustrating a connection state between a conventional electronic switch, a guide, and a subscriber in which a CENTREX function is introduced;

3 is a connection state diagram of an electronic switch, a guide and a subscriber for implementing the present invention;

4 is an internal configuration diagram of an ACC of an electronic exchanger for implementing the present invention;

5A and 5B are flow charts illustrating a process in which an electronic exchange switches a call back as guided according to an embodiment of the present invention.

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

FIG. 3 is a diagram illustrating a connection state between an electronic switch, an information desk, and a subscriber for implementing the present invention, in which part or all of the subscribers connected to the same electronic switch are integrated into a plurality of CENTREX groups, and one CENTREX group includes a maximum of 10. FIG. The guides for performing the guide function of the group are registered, and only one CENTREX group and an external subscriber A are shown in FIG. 3.

Figure 4 is a block diagram showing the internal configuration of the ASS of the electronic switch for implementing the present invention, the ASS is an Access Switching subsystem Processor (ASP) equipped with an Attendant Console Control (ACC) block, and Digital Subscriber Interface Telephony Processor (TP) block and BRI (Basic Rate Interface) hardware module connected with guide.

The DSI block is a software block that receives information from a BRI hardware module to which a guide is connected, transfers received information to an ASP, which is an upper main processor, and controls a device.

In addition, the DSI block separates the 2B + D signal and data information received from the subscriber into the B channel and the D channel, and transmits the B channel to the time switch, and the D channel transmits the link access procedure on the D- It handles channel protocol and transmits error-free signaling information to ISDN Subscriber Access Processor (ISAP) and has ISDN subscriber line termination.

The ACC block is a guide control software block loaded in an ASP which is a main processor of the ASS. The ACC block performs an interprocessor communication (IPC) communication with the DSI block to process a control message transmitted by the guide.

In order to implement an embodiment of the present invention, the inter-guide call transfer control block is generated / deleted in the ACC block. The call transfer control block includes a main module which is in charge of the overall control of the guide call transfer service, a term module which is a processing module for the incoming call to the guide, and an outgoing call from the guide to the internal or external subscriber of the CENTREX group. It consists of an org module, a holdorg module which is a hold control module for guide call origination call, a holdterm module that is a hold control module for guide call incoming call, and a trforg module that is call transfer control module. In addition, the modules are each created / destroyed in the form of a process.

The guide is connected to an electronic switching system using BRI, an ISDN interface, and its basic call procedure follows the procedures of ISDN Q.921, Q931. The BRI provides a channel capacity of 2B + D to each subscriber. The BRI is allocated a B channel by using a D channel (16 Kbps) to transmit a signaling message necessary for connection, maintenance, and release of a call. Deliver the necessary data (voice, digital data, etc.)

In addition, the guide is provided with a terminal provided with a key panel, a monitor screen, etc. The terminal collects and stores the IPC data generated by the electronic switchboard and outputs it to the monitor screen at the request of the guide.

Referring to the flow chart shown in Figures 5a and 5b described in detail with reference to the flow diagram shown in Figure 5a and 5b, the electronic exchanger configured as described above according to an embodiment of the present invention.

First, when a call is received from the external subscriber A shown in FIG. 3 to the guide C, the main process of the electronic switchgear generates a term process, and the term process transmits that the call has been received to the terminal of the guide C. The terminal rings to notify the attendant that there is an incoming call.

Subsequently, when the receptionist at the reception desk C hooks off the terminal, a telephone call is made between the receptionist at the reception desk C and the external subscriber A, and the external subscriber A is at the reception desk. When the attendant at C is informed of the telephone number of the internal subscriber B belonging to the same CENTREX group, the attendant at the reception desk C operates the key panel of the terminal and inputs the subscriber B's telephone number. Calls to subscriber B as the main process of.

When the subscriber B's telephone number is input from the terminal of the information desk C, the term process is succeeded to the holdterm process under the control of the main process. When the subscriber B's telephone number is completed, the main process creates a new org process, and org The process requires an incoming call to subscriber B.

Thereafter, the org process receives a response from subscriber B (subscriber B hears a ring ringing from the terminal and hooks the terminal off), and if a call transfer is requested from the terminal of guide C, the call is controlled under the main process. It is succeeded by trforg which is a switching control module.

Thereafter, if the trforg process requests call transfer information to the holdterm process, the holdterm process notifies the call transfer to the trforg process and requests out to guide C, and the trforg process is informed of the call transfer to holdterm process. Call transfer is requested.

The holdterm process requests subscriber A (the calling party) to transfer a call when a call is requested to be transferred, and when a notification is received from subscriber A to the transfer call, the call is transferred to a trforg process. Be notified.

When the trforg process is notified of the transfer of the call transfer call, the subscriber B notifies the transfer of the call transfer call so that the terminal of the subscriber B generates a ring, and the subscriber A listens to the ring back tone. Thereafter, the trforg process registers a re-call timer with the operating system (OS).

On the other hand, if the subscriber B does not continue to hook the terminal, i.e., when the subscriber B is not answering the call and the timeout of the incoming call timer is notified from the OS, the trforg process goes to the holdterm process. Re-information is requested, and subscriber B is notified of the release so that the terminal no longer rings.

The holdterm process first checks the state of guide C, from which the call of subscriber A was called, to determine whether guide C can redial the call.

As a result of the above judgment, if guide C is able to redial a call, the holdterm process will redial the call to guide C. If guide C is not able to redial a call, another guide within the same CENTREX group is If other guides exist to determine whether they exist, it is determined whether each guide can be called in turn, and if there is a guide that can receive a call, the incoming call is re-called according to the guide.

For example, if the holdterm process is capable of receiving a call by determining whether the guide D (shown in FIG. 3) registered in the same CENTREX group as the guide C can receive the call, as shown in FIG. 5B. Likewise, when the call is requested to the guide D, and the response is received from the guide D, a telephone call is made between the subscriber A and the guide D of the guide D, and the control is transferred to the term process under the control of the main process.

When a telephone call is made between the subscriber A and the guide of the guide D, the guide of the guide D informs the subscriber A that the subscriber B does not respond, and the holdterm process and the trforg process disappear.

However, if there is no other guide in the CENTREX group to which guide C belongs, the holdterm process sends a call to subscriber A's terminal, indicating that connection with subscriber B is impossible.

As a result, the present invention allows the originating call to be re-sent according to the other guides belonging to the same CENTREX group as the guide when the outgoing call cannot be re-initiated according to any guide, so that the situation of the subscriber who is called to the calling party is requested. Let them know

In this way, when the present invention is impossible to re-initiate an outgoing call according to any guide, the outgoing call is received according to other guides registered in the same group as the guide, so that the outgoing call can not be connected to the called party's internal subscriber. It is possible to facilitate the convenience of subscribers and to diversify information service related to information desks.

Claims (2)

In the method of redialing a reception desk of an electronic switching system in which subscribers are divided into a plurality of groups and at least one reception desk is registered in each group, A first step of determining whether another guide is registered in the group in which the first guide is registered if the outgoing call is not re-initiated according to the first guide registered in one of the plurality of groups; A second step of determining whether the second guide is in a state capable of receiving a call if another guide (hereinafter, referred to as a second guide) is registered in the group as a result of the determination of the first step; If the second guide is in a state capable of receiving a call as a result of the determination of the second step, a third step of receiving the outgoing call according to the second guide is provided. . The method of claim 1, And when the other guide is not registered in the group as a result of the determination of the first step, transmitting a call tone to the terminal of the calling party.

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