KR19980063095A - Delayed Call Handling Method of Local Electronic Switching System - Google Patents

Abstract

The present invention relates to a delayed call processing method of a local electronic switchgear, comprising at least one guide from a subscriber station (12) of a domestic station for processing a call setup request for a third subscriber through a switchboard of a host. A first step of requesting call setup for one guide 24 of said at least one guide posts in response to a call setup request for a third subscriber of a home country or another station exchange 10; A second step of attempting to set up a call to a third subscriber in response to a call setup request of the calling party's terminal 12 at the guide 24; A third step in which the third subscriber determines to switch to the available call state after registering the call setup request from the calling party's terminal 12 when the third subscriber is in an unreachable state in the second step; ; And a fourth step of establishing a call path between the calling party subscriber terminal 12 and the third subscriber by the registered call information when the third subscriber switches to the call-acceptable state.

Description

Delayed Call Handling Method of Local Electronic Switching System

The present invention relates to a delayed call processing method of a local electronic switchgear, and more particularly, a call with a third subscriber through an at least one operator position system (OPS) accommodated in a national electronic switchgear. If the third subscriber is in a call or is in a state where reception of the call is not possible, register the call information and automatically transfer the call information while making a call with the third subscriber. The present invention relates to a delayed call processing method.

At present, an electronic switching system has been proposed as a means for providing an optimized call service for call setup and call requests generated from subscriber terminals in a state where a plurality of subscriber terminals are interconnected through a call network. It is a state applied to practical use.

According to such an electronic switching system, a plurality of subscriber terminals accommodated in one switching center are connected to a call path network including, for example, a semiconductor switch via a subscriber line, thereby enabling mutual communication, and connecting with subscriber terminals accommodated in another switching center. Is realized through the trunk.

In addition, the electronic switchboard includes a device (Scanner) that detects all events occurring in subscriber lines and trunks and notifies the control unit, which includes, for example, an on-off hook of a handset, a telephone number to be dialed, The incoming signal from the subscriber terminal and the state of the relay line (collinear or busy) are detected.

In addition, the electronic switchboard also includes a signaling equipment that is responsible for the processing of signals to be transmitted through the telephone network. The signaling equipment includes, for example, a dial tone, a call tone, a call tone, a call signal current under the control of a control unit. For example, a signal to be transmitted to another station exchange is generated.

Therefore, according to the conventional electronic switchboard, the call request from the subscriber terminal is automatically executed and the call signal is processed to provide an efficient call service.

Here, for example, if the format of a foreign exchange to which a call establishment request generated at the subscriber terminal of the local electronic switchgear is transmitted is different from that of the local exchange, direct call establishment processing with the subscriber terminal connected to the foreign exchange is impossible. Done.

In view of such a situation, a so-called 0g operator position is used to implement a call connection to a foreign exchange that adopts a different exchange method for a domestic electronic exchange, or to handle a separate charging process for a subscriber terminal of its own country. It is assumed that the system) 0c is connected to at least one system, and the exchange system differs by the operation of an operator operating the guide in response to a call setup request generated at the subscriber station of the local exchange by providing the guide. It is possible to make a compatible call connection with the other subscriber station connected to the other station exchange.

However, at present, the third subscriber is busy with a call setup request for attempting to make a call to the third party subscriber from the subscriber terminal through at least one or more reception desks accommodated in the domestic electronic exchange. If the caller does not receive the call or the caller does not receive the call, the subscriber terminal requesting call setup cannot recognize the recovery of the third subscriber to the callable state. Therefore, the caller subscriber terminal frequently sets up the call to the third subscriber. You will be asked for a guide.

That is, when a calling party requests a call connection with a third subscriber through a guide station, the calling party tries to call repeatedly until the call connection is made with the third subscriber, and frequently occurs at the guide party. There is a disadvantage of having to respond to a call establishment request from the calling party's terminal.

The present invention has been made in view of the above-described circumstances, and when a call establishment request with a third subscriber is generated from a calling party subscriber terminal at a local electronic switchboard to which at least one information desk is connected, Local caller to register call information of the calling party's subscriber terminal as delayed call information at the information desk if the caller is in a call or not receiving the call. The purpose is to provide a delay call processing method of the exchange.

In order to achieve the above object, according to a preferred embodiment of the present invention, at least one guide is connected to perform call setup for each other's subscriber terminal or its subscriber terminal and the subscriber terminal of another station through the guide. A first electronic switching system comprising: a first requesting call setting for one of the at least one guides in response to a call setting request for a third party subscriber of the own country or another country exchange originating from the subscriber station of the own country; Step; A second step of attempting to establish a call to a third subscriber in response to a call establishment request of the calling party subscriber terminal at the information desk; In the second step, when the third subscriber is not available to receive the call, the call subscriber may selectively register the call setup request from the calling party subscriber terminal as delayed call information and then return to the third subscriber. A third step of judging the conversion of; And a fourth step of establishing a call path between the calling party's terminal and the third subscriber based on the registered call information when the third subscriber switches to the call-acceptable state. In the present invention, a delay call processing method is provided.

According to the present invention, the call setup request for the guide of the first step is registered with the call setup request when the guide cannot respond to the call request and is executed for the restored guide when the guide is restored. .

Further, the second step of attempting to set up the call to the third subscriber is determined by the guide in response to the call setup request when the reception of the call is possible by determining the reception status of the third subscriber in the guide. The caller of the calling party and the third subscriber set up a call path, and when the caller cannot receive the call, the delayed call is determined by determining the registration request of delayed call information (call registration information) in response to a call registration voice guidance. If the registration of the information is not required, the call path for the calling party subscriber terminal is disconnected while the request for registration of the delayed call information is registered in the memory of the called party means.

In addition, according to the present invention, the delayed call information preferably includes the calling party's name and telephone number.

The call setup for the third subscriber in the third step requires transmission of the delayed call information registered in the called party means from the information desk when the third subscriber is able to receive a call. A call is set up for the third subscriber based on call information, and when a call is set up with the third subscriber, the calling subscriber terminal is called to establish a call path with the third subscriber.

According to the delayed call processing method of the local electronic switching system according to the present invention described above, in response to a call setup request for a third subscriber from a calling party subscriber terminal, a call setup attempt is made from the information desk to the third subscriber. If the call setup with the third subscriber is not available, the call subscriber is selected to store the call information by the voice guidance to the calling party's terminal, and the registered call information is restored when the third subscriber returns to the callable state. In addition to transmitting the information to the third subscriber terminal via the guide, the caller can be notified of the call setup state by the calling subscriber terminal so that the calling subscriber terminal and the third subscriber can be called. In a state where call setup is impossible, frequent call connection attempts at the calling party's subscriber station can be eliminated as much as possible.

1 is a view showing a functional block configuration of a conventional electronic switchboard which realizes a delay call processing method by a guide according to a preferred embodiment of the present invention;

2A to 2E are flowcharts for explaining a delay call processing method of a conventional all-electronic exchanger according to the present invention.

Explanation of symbols on the main parts of the drawings

10 --- local exchange, 12 --- local subscriber terminal,

14 --- calling party, 16 --- number translation,

18 --- called party, 20 --- Q.931 protocol,

22 --- Q.921 link, 24 --- guide,

26 --- Relay call processor, 28 --- Foreign exchange.

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

1 is a block diagram showing a functional block configuration of a local electronic switchboard which realizes a delay call processing method by a guide according to the present invention. In the local switch indicated by reference numeral 10, 12 is housed in the local switch 10. A representative subscriber station requiring call setup to a guide (described as '24' in FIG. 1) described below for a third subscriber of a third-party subscriber or a different subscriber station ('28' in FIG. 1) to which a different exchange scheme is applied. Indicates.

14 requests translation of the number based on a request for call establishment generated by the subscriber station 12 of the local exchange 10, and the guide 24 requested by the subscriber station 12 of the local exchange 10. Originating subscriber line control that notifies the result of connection of the announcement to the reception desk 24 or the third party subscriber when the call setup for the third party or the third party subscriber cannot be established. part).

Reference numeral 16 denotes a call to the guide 24 in response to a number translation request based on call setup in the calling party 14 or the relay call processing unit (indicated by '26' in FIG. 1) described later. In addition to the request, a number translation unit for receiving a message requesting a connection by a call from the information desk 24 and delivering it to the originating subscriber unit 14 (or the relay call processor 26) requesting a call setup. processing part).

18 accepts the call setup request for the translation requested number from the calling party subscriber unit 14 to determine the answerable state of the guide 24, that is, the state of being able to talk to the guide 24, and the guide 24 If the call is possible, the guide 24 is in a callable state if the call setup request is executed from the subscriber terminal 12 of the calling party or if the guide 24 is not available. Guide broadcasting indicating the busy state of the guide 24 by storing the call setup request from the subscriber terminal 12 of the calling party in a memory means (i.e., call registration buffer or call waiting queue; not shown) until The terminating subscriber line control part, which acts to be transmitted to the subscriber terminal 12 side of the calling party instead of the busy tone, is shown. In addition, the called party 18 is configured to store delayed call information that is registered via the guide 24 when the third party of the call setup target is not received at the calling party's terminal 12. (I.e., delayed call registration buffer; not shown) and when the third subscriber is converted into a callable state, the registered call information is transmitted to the reception desk 24 to send the calling party subscriber terminal 12 and the third subscriber. The call path is set up between and.

In this case, as the delayed call information, the name or subscriber number of the subscriber occupying the calling party subscriber terminal 12 can be applied, and if necessary, the application of a specific code number is also possible.

In FIG. 1, reference numeral 20 transmits a call setup request from the called party 18 to the guide 24 and sends a call setup OK message from the guide 24 to the called party ( Represents the Q.931 recommadation processing part that carries out the protocol of the ITU-T Recommendation for delivery.

22 is a Q.921 link unit (ITU) which transmits a call setup request from the Q.931 protocol unit 20 to the side of the guide and transmits a call setup OK message to the Q.931 protocol unit 20. -T Indicates Q.921 recommadation processing part.

In addition, in FIG. 1, at least one or more guides 24 are installed on the local exchange 10, in response to a call setup request (or call information registration request) generated at the subscriber station 12 of the calling party. By the operator's work, for example, the call setting process is performed with the third subscriber included in the local exchange 10 or the foreign exchange 28, and the guide 24 is busy or the third subscriber sets the call. In the non-response state, the information of the call setup request in the subscriber terminal 12 on the calling side is stored by the operator in the memory means (not shown) of the called party 18.

In addition, in FIG. 1, the relay call processing unit 26 requests a translation of the called party number to the number translation unit 16 for the called party number requested by the third subscriber (or subscriber terminal) of the foreign exchanger 28. In addition, the relaying process of the message for notifying the third subscriber (or subscriber station) of the other station exchange 28 of the result of the announcement broadcast connection processed by the number translation unit 20 is performed.

Next, the delay call processing method of the conventional electronic switch system according to the present invention having the above-described configuration will be described in detail with reference to the flowchart shown in FIG. 2.

First, when a call setup request is made to the information base 24 for a call from a subscriber station 12 of the local exchange 10 to the third subscriber housed in the local exchange 10 or the foreign exchange 28, for example. (Step 40), the number translation request is transmitted to the number translation unit 16 via the caller subscriber unit 14 (step 42).

If the number translation unit 16 receives a number translation request from the calling party unit 14, the number translation unit 16 requests a call to the reception desk 24 for the called party 18 in step 44. 18. The Q.921 link unit 22 provides information on a state (i.e., a busy state or a callable state, etc.) for at least one or more guides 24 connected to the local exchange 10. And the Q.931 protocol unit 20 determine whether there is a call guide 24 available for the call setup request (step 46).

As a result of the determination in step 46, if there is no call guide 24 available, the called party 18 transfers the busy state of the guide 24 to the calling party 14, and The information on the request for reception of the guide from the originating subscriber 14 is stored in an internal call registration buffer (or a queue (not shown)) (step 48).

Then, the calling party subscriber unit 14 requests the number translation unit 16 to connect the announcement broadcast on the call of the guide 24 (step 50), and responds to the connection request of the announcement. The number translation unit 16 connects the announcement in step 52 and notifies the calling subscriber unit 14 of the result of the announcement of the announcement, and accordingly, the local exchange that generated the call request for the reception desk 24. On the subscriber terminal 12 side of (10), the guidance broadcast regarding the busy state of the information base 24 is performed by voice.

Subsequently, the guide 24 requests the call disconnection of the call to the destination subscriber unit 18 through the Q.921 link unit 22 and the Q.931 protocol unit 20. Accordingly, the receiving party 18 notifies the guide 24 of the call disconnection result, or the receiving party 18 requests the cutting of the busy call from the receiving party 18 to the guide 24 and requests the request. As a result, the guide 24 is notified to the destination subscriber unit 18 the result of the call cutting request.

Subsequently, when the called party 18 determines the recovery of the call guide 24 available for communication (YES in step 54), the called party 18 stores the call stored in the call registration buffer (or call waiting queue). The information is read in a first-in, first-out (FIFO) manner, and a call request is generated to the call counter 24 (step 56).

In addition, even when there is a guide 24 available for communication as a result of the determination in step 46, the process proceeds to step 56 to generate a call request to the guide 24.

In response to the call request from the called party 18 generated in step 56, the guide 24 capable of making a call transmits a ring to the called party 18, which has requested a call setup, and sends a call. The setting OK is notified (step 58).

Accordingly, when the called party 18 receives call setup OK information, the called party 18 transmits ringing ringing information to the calling party 14 (step 60).

The calling subscriber 14 receiving the ring start information determines whether the subscriber is in a state of listening to the announcement performed in step 52 (step 62). If it is determined that the listening state, the number translator 16 requests the cutting of the announcement and connects a ring back tone to the subscriber.

In contrast, if it is determined in the step 64 that the subscriber does not listen to the announcement, the process proceeds to step 68 where only the ringback tone is connected.

After the ringback tone in step 66 or step 68 is connected, the called party 18 receives the response from the call guide 24 in step 70 and transmits it to the calling party terminal 12. Thus, the call path is formed, and thus, the calling party subscriber terminal 12 and the guide 24 are set in the call state in step 72, so that the guide 24 according to the request of the subscriber station 12 in the country. The guidance function at will be executed.

The third subscriber of the local exchange 10 or the foreign exchange 28 in the calling party subscriber terminal 12 in a state in which the call path of the calling party (that is, the calling party member 14) and the guide 24 is formed. A call connection request is requested (step 74), and in response to the call connection request, the guide 24 attempts a call connection to the third subscriber (step 76).

Upon execution of the call connection to the third subscriber, the guide 24 determines in step 78 whether the third subscriber receives the call, and if the third subscriber receives the call, step 80 By setting the call path between the calling party subscriber terminal 12 and the third subscriber, the calling party subscriber terminal 12 and the third subscriber are in a callable state.

On the other hand, if it is determined in step 78 that the third subscriber does not receive the call, in step 82, the call reception status of the third subscriber is notified to the calling party's terminal 12, and the voice guidance is performed. In response to this, it is determined whether a registration request for delayed call information from the calling party terminal 12 is generated.

As a result of the determination in step 82, if there is no request for registration of delayed call information for the third subscriber, the guide 24 generates a call cutting request to the called party 18 in step 84. As a result, the call with the calling party subscriber terminal 12 is terminated.

On the other hand, if it is determined in step 82 that the request for registration of delayed call information is generated in the calling party's terminal 12, the information desk 24 provides the recipient subscriber unit 18 with the delayed call information in step 86. The registration is requested, and the called party 18 registers the delayed call information from the guide 24 in the internal memory means (i.e., call registration buffer or call waiting queue (not shown)). Step 88).

In this case, as the delayed call information, the calling party's name or telephone number designated by the calling party subscriber terminal 12 is applied.

Therefore, the called party 18 registers the delayed call information in step 88 and registers the delayed call information with the Q.931 protocol 20 and the Q.921 link 22. The information desk 24 is notified, and the information desk 24 notifies the calling party subscriber terminal 12 of the registration of delayed call information by voice in step 90.

Subsequently, the guide 24 requests call cutting for the called party 18 in step 92, and the called party 18 notifies the calling party 14 of the call cutting and then calls the call. This is done.

When the call cutting is performed by the above process, the called party 18 is notified of the call cutting OK to the guide 24 at step 96, and the calling party 14 is number translation unit 16. You will be asked to cut the currency.

In the state in which the call path between the calling party terminal 12 and the guide 24 is cut, the guide 24 determines whether the third subscriber is switched to a callable state.

As a result of the determination, when the third subscriber converts and recovers to the callable state (YES in step 100), the guide 24 requests the delayed call information registered for the called party 18 in step 102. In response to the request, the called party 18 has a delayed call information (i.e., originating subscriber) for the third subscriber registered in the internal memory means (i.e., call registration buffer or call waiting queue) in step 104. The name or telephone number) is read out and transmitted to the information desk 24.

Then, the guide 24 performs a call for setting the call path for the third subscriber based on the delayed call information in step 106 and then calls the third party subscriber 12 with the third subscriber. And the calling party subscriber terminal 12 and the third subscriber are available for a call.

That is, the guide 24 notifies the called party 18 about the setting of the call path when the third subscriber returns to the callable state, and the called party 18 translates the number. The number 16 is to be notified to the calling party about the setting state of the call, and accordingly, the number translation part 16 establishes a call path to the calling party subscriber terminal 12 through the calling party subscriber 14. You will be notified of a condition.

The calling party subscriber station 12 can be assumed to be a subscriber station connected to another switching center 28, and in such a case, the delay call can be processed by a similar procedure.

As described above, according to the delayed call processing method of the local electronic switching system according to the present invention, the third subscriber can receive a call setup request for the third subscriber in the calling party subscriber terminal connected to at least one information desk. If the call information is not received immediately, the call information is registered at the request of the calling party's subscriber terminal, and when the callee can receive the call, the call channel is connected to the third subscriber by the call information. The automatic connection is made, and thus the occurrence of frequent call setup request for the call path connection with the third subscriber in the calling party subscriber terminal is suppressed as much as possible, and the efficiency of call setup by the guide can be greatly improved. .

Claims (5)

In a local electronic switchboard which at least one information desk is connected and performs call setup for each other's subscriber terminal or its own subscriber terminal and another subscriber's terminal through the information terminal, In response to a call establishment request from a subscriber station 12 of the home country or a third party subscriber of the other country exchange 10 or 28, the call setup of one guide 24 of the at least one guide station is made. The first step required; A second step of attempting to set up a call to a third subscriber in response to a call setup request of the calling party's terminal 12 at the guide 24; In the second step, if the third subscriber is not available to receive the call, the third party registers the call setup request from the calling party subscriber terminal 12 selectively as the delayed call information in the called party processing means 18, and then the third subscriber. Determining a subscriber's transition to a callable state; And a fourth step of establishing a call path between the calling party's subscriber station 12 and the third subscriber by the registered call information when the third subscriber is switched to a call-acceptable state. Delayed call handling method at the information exchange desk of the national electronic exchange. The call setting request according to claim 1, wherein the call setting request for the guide stand 24 of the first step is registered when the call setting request is not answered by the guide stand 24 for the call request. The delayed call processing method of the local electronic switchboard, characterized in that to be executed for the restored guide 24 at the time of recovery. According to claim 1, The second step of attempting to set up the call to the third subscriber is determined by the guide 24 to determine the call receiving status of the third subscriber to the call setup request when the call is possible In response, the call center sets the call path of the calling party subscriber terminal 12 and the third subscriber, and the delayed call information in response to the call registration voice guidance when the third subscriber cannot receive the call. Call registration information) is determined, and if the registration of the delayed call information is not required, the call path for the calling party subscriber terminal 12 is disconnected while the delayed call information registration is requested. The delayed call processing method of a local electrical switchboard, characterized in that to register in the memory of the incoming subscriber means. 4. The method of claim 3, wherein the delayed call information includes a calling party's name and telephone number. The call setup of claim 3, wherein the call setup for the third subscriber in the third step is delayed call information registered in the called party means 18 in the guide 24 when the third subscriber is in a state of being able to receive a call. Requesting transmission of the third party, and establishing a call to the third subscriber based on the transmitted delayed call information, and when a call is established with the third subscriber, the calling party terminal 12 is called. 3. A delayed call processing method of a national electronic switchgear, characterized by setting up a call path with a subscriber.