KR20000042218A - Call process method for displaying incoming number on transmit terminal in integrated service digital network exchange system - Google Patents

Abstract

PURPOSE: A call process method for displaying an incoming number on a transmit terminal in an integrated service digital network(ISDN) exchange system, is provided to display a number of incoming party on a terminal of a transmitting party, when a main station of transmitting party requests for a call access, and to display an incoming number on a terminal of the transmitting party. CONSTITUTION: A call process method for displaying an incoming number on a transmit terminal in an integrated services digital network(ISDN) exchange system, refers to a method for processing a call of primary rate interface for displaying an incoming number on a transmitting terminal. The call process method comprises the steps of: transmitting a call progressing message to the ISDN when a setup message responds to being leaded-in, and then an incoming party requests for call progress; transmitting a message displayed an incoming state of the incoming party to the ISDN, in an indication-type; and transmitting a call access message including the number of the incoming party to the ISDN.

Description

Call Processing Method for Displaying Called Party Number on Calling Terminal in Integrated Information Communication Network Switching System

The present invention relates to a general information communication network switching system, and more particularly, to a call processing method for displaying a called number on a calling terminal.

A typical form of communication is human-to-human communication where the calling party and the called party make a direct call. In the case of such a human-to-human communication, there is no problem in the destination confirmation because the called subscriber is confirmed by the call after the start of communication. On the other hand, in the case of communication between a human and a machine such as a facsimile, there is a problem in confirming a destination because a communication partner is not identified.

Of course, in the present facsimile communication between the compatible models are processed so that the called party number is displayed on the calling terminal, there is a convenience that can confirm the information about the destination at the time of communication as in the case of human-to-human communication. For example, Integrated Services Digital Network (ISDN) supports COLP (COnnected Line Identification Presentation) and COLR (COnnected Line Identification Restriction) as additional services. Here, the COLP function is a function of displaying a responder's number, that is, a called number, on a calling terminal when a call is connected by a caller making a call (hook off). The COLR function is a function that prevents the answering party's number, ie called number, from being displayed on the calling terminal when the call is answered. Since this service causes the called party number to be displayed on the calling terminal, such as a facsimile connected to the ISDN exchange, the calling subscriber can reliably communicate while checking whether the called party is where he or she wants to communicate. It becomes possible to do it.

On the other hand, depending on the type of facsimile, the called number may not be displayed on the calling terminal. Therefore, there is a disadvantage in that the calling subscriber transmitting the document cannot check whether the document transmitted by him or her is correctly delivered. This shortcoming may be solved by the sending subscriber retransmitting the document, but this retransmission procedure is very wasteful from both the subscriber's point of view and the system's point of view.

Accordingly, an object of the present invention is to provide a call processing method for displaying a called number on an originating terminal in an ISDN exchange system.

It is another object of the present invention to provide a call processing method for allowing a calling subscriber to check information of a called destination and perform stable communication in an ISDN exchange system.

The present invention for achieving these objects discloses a call processing method for displaying the called number on the calling terminal in the switching system connected to the ISDN through the primary group speed interface (PRI). This call processing method is done by PRI.

The call processing method according to the present invention includes a first process of transmitting a call progress message to the ISDN when there is a call progress request from the called subscriber in response to an incoming setup message for call setup from the ISDN; A second process of transmitting a message indicating the incoming state of the called party to the ISDN after performing the second process, and a call connection message including the number of the called party after performing the second process; And at least a third process of transmitting to the ISDN.

In addition, the call processing method according to the present invention, after the call connection message is transmitted to the calling subscriber side through the ISDN, a call connection acknowledgment message is received from the calling subscriber side to establish a call path between the calling subscriber and the called subscriber. And forming a fourth process, and at the same time as the fourth process is performed, an operation of displaying the number of the called party is performed on the calling terminal of the calling party.

The operation of the third process is performed by a PRI including at least a layer 3 processing unit and an application layer processing unit. That is, after performing the second process, the application layer processor determines whether to display the number of the called party on the calling terminal by receiving a response message from the called party. The layer 3 processor receives the result confirmed by the application layer processor and transmits a call connection message including called number indication information or called number indication restriction information to the ISDN.

1 is a view showing a schematic configuration of a comprehensive information communication network switching system to which the present invention is applied.

2 is a diagram showing a call processing flow for displaying a called number on a calling terminal according to the present invention.

DETAILED DESCRIPTION A detailed description of preferred embodiments of the present invention will now be described with reference to the accompanying drawings. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. In addition, the terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of the user or chip designer, and the definitions should be made based on the contents throughout the present specification.

1 is a diagram illustrating a schematic connection configuration of an ISDN exchange system to which the present invention is applied.

Referring to FIG. 1, the ISDN exchange 4 is connected to the ISDN through a primary rate interface (PRI), and is connected to the subscriber station 6 through the subscriber circuit 40. The ISDN exchange 4 includes at least a control unit 10, a PRI 20, a switching circuit 30, and a subscriber circuit 40. The controller 10 controls the overall operation of the ISDN exchange, including call processing and call switching operations. The control unit 10 further includes a memory unit such as a read only memory (ROM) and a random access memory (RAM), a tone generator, a dual tone multi frequency (DTMF) generator, and a DTMF transmitter. Can be controlled. The switching circuit 30 switches various tones and voice data under the control of the controller 10. By the switching operation of the switching circuit 30, the tone and voice data are transmitted and received between the calling subscriber and the called subscriber. At this time, both the calling subscriber and the called subscriber may be an extension subscriber connected to the subscriber circuit 40, or may be a trunk line subscriber connected through the ISDN. The subscriber circuit 40 supplies a call current to the subscriber station 6 under the control of the controller 10 and interfaces a signal between the subscriber station 6 and the switching circuit 30.

PRI 20 is a trunk circuit that supports 1.544 Mbps interface speed. Under control of the control unit 10, a PRI 20 establishes a trunk line call loop with ISDN 2 under the control of the control unit 10, and transmits a signal between the trunk line and the switching circuit 30. Interface. The PRI 20 is a layer 3 processing unit 21 for processing the main functions of the layer 3 (network layer) among the protocol layers according to the Open Systems Interconnection (OSI) reference model, and the main functions of application adaptation. The application layer (APPLICATION LAYER) processing unit 22 is made. According to the present invention, the application layer processing unit 21 checks the contents of the received response message when the response message is received from the called subscriber under the control of the control unit 10 so as to display the called number on the calling terminal or the called number. Confirm that you want to restrict the display. The layer 3 processor 22 generates a call connection message including a COLP message and a COLR message using the result confirmed by the application layer processor 21 and transmits the message to the ISDN.

2 is a diagram illustrating a call processing flow for displaying a called number on a calling terminal according to the present invention.

Now, assuming that the setup message (SETUP) for call setup in step S11 is coming in from ISDN 2 from the counterpart station, in step S12, the layer 3 processor 21 of PRI 20 is assigned a digit number (DIGIT NO) included in this setup message. .: 0914) is sequentially transmitted to the application layer processor 22. The setup message SETUP includes a calling party number and a calling party number, and the digit number 0914 corresponds to the called party number. When all the digit numbers have been received, the application layer processor 22 transmits a message indicating that all digit numbers have been received (END OF DIGIT) to the controller 10 in step S13. In response, the controller 10 transmits a call proceeding request (CALLPROC_RQ: call proceeding request) to the application layer processor 22 in step S14, and the application layer processor 22 responds to the call progress request message NS_CALLPROC_RQ in step S15. ) Is transmitted to the layer 3 processor 21. In response to the message NS_CALLPROC_RQ being transmitted, the layer 3 processor 21 transmits a call progress message CALLPROC to ISDN 2 in step S16.

Next, in step S17, the controller 10 generates a message (CALLED_STATUS) indicating the incoming state of the called party. The generated message CALLED_STATUS is transmitted to the application layer processor 22. The application layer processor 22 generates a message NS_ALERT_RQ in step S18 and transmits the message NS_ALERT_RQ to the layer 3 processor 21 in response to the transmission of the message CALLED_STATUS. Then, in step S19, the layer 3 processor 21 generates a message ALERT and transmits it to ISDN 2. That is, in steps S17 to S19, the controller 10 generates a message indicating the called state of the called party, and the generated message is transmitted to ISDN 2 in the form of an alert.

Next, the controller 10 generates a response message (ANSBACK) in step S20 so that the generated message is transmitted to ISDN 2 in the form of a call connection message (CONNECT). That is, when the control unit 10 generates a response message (ANSBACK) in step S20 and delivers it to the application layer processing unit 22, the application layer processing unit 22 generates a message NS_CONN_RQ in step S22 and delivers it to the layer 3 processing unit 21, and the layer 3 processing unit. 21 generates a call connection message (CONNECT) in step S23 and delivers to ISDN 2. At this time, the message CONNECT transmitted to ISDN 2 includes COLP / COLR information.

More specifically, when the response message (ANSBACK) is received from the controller 10, in step S21, the application layer processing unit 22 checks a parameter for determining whether or not to display the called number on the calling terminal. Next, in step S22, the application layer processor 22 generates a message NS_CONN_RQ corresponding to the verification result of the parameter and transmits the message NS_CONN_RQ to the layer 3 processor 21. Then, in step S23, the layer 3 processor 21 checks the contents of the transmitted message NS_CONN_RQ, and generates COLP (COnnected Line identification Presentation) information or COLR (COnnected Line identification Restriction) information corresponding to the result of the check. Here, the COLP information is information for displaying the called number on the calling terminal, and the COLR information is information for limiting the displaying of the called number on the calling terminal. That is, the COLR information is information so that the called number is not displayed on the calling terminal.

In step S23, COLP information or COLR information is generated, and in step S24, a call connection message (CONNECT) including the generated COLP information or COLR information is generated and transmitted to ISDN 2. When the call connection message (CONNECT) is delivered to the calling party through ISDN 2, the calling party (CALLING SIDE) generates a call connection response message (CONNECT_ACK) to transmit to the calling party (CALLED SIDE) in step S25. do. Then, in step S26, the active call becomes an active state. At this time, since the calling party receives the call connection message (CONNECT) including the COLP information or the COLR information from the called party, it is determined whether to display the called number on the calling terminal, and the COLP message is displayed in the call connection message (CONNECT). If the information is included, the called number should be displayed on the calling terminal.

On the other hand, since the COLP is information according to the calling party's function and the COLR is information based on the calling party's function, when the calling party or the called party requests such service from the ISDN exchange at the same time, only one of the services is determined by setting priority You need to be. In the present invention, the control unit 10 of the ISDN exchange puts a higher priority on the COLR function than the COLP function, and if the COLP function and the COLR function are required at the same time, the COLR function is served.

As described above, in the present invention, when the call connection request is made from the calling party, the calling party subscriber number is displayed on the terminal of the calling party subscriber. The operation of the present invention has the advantage that the called party number can always be displayed on the calling terminal even if the type and model of the calling terminal and the called terminal are different. In addition, by the operation according to the present invention, the calling party subscriber can know the destination accurately, there is an advantage that it can perform a stable communication.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by the equivalents of the claims.

Claims (5)

In the call processing method of the PRI for displaying the called number on the calling terminal in the switching system connected to the ISDN through the primary speed interface (PRI), A first step of transmitting a call progress message to the ISDN when there is a call progress request from the called subscriber in response to the setup message for call establishment from the ISDN; A second process of transmitting the mesh indicating the incoming state of the called subscriber to the ISDN after performing the first process in the form of an alert; And performing a second step of transmitting the call connection message including the number of the called party to the ISDN after performing the second step. 4. The method of claim 1, wherein the call connection message is transmitted to the calling party through the ISDN, and then a call path is established between the calling party and the called party as a call connection approval message is received from the calling party. Further comprising a process. The method as claimed in claim 2, wherein the number of the called subscriber is displayed on the calling terminal of the calling subscriber at the same time as the fourth process. The method of claim 3, wherein the PRI comprises a layer (LAYER) 3 processing unit, the application layer (APPLICATION LAYER) processing unit at least, The third process, A first step of confirming whether the application layer processor displays the number of the called party on the calling terminal by receiving a response message from the called party after performing the second process; And receiving a result confirmed by the application layer processor and transmitting, to the ISDN, a call connection message including the called party number indication information or the called number indication restriction information to the ISDN. 5. The method according to claim 4, wherein the application layer processor preferentially sets the called party number restriction information to the called party number indication information when the layer 3 processor requests the simultaneous generation of the called party number indication information and the called number indication restriction information. Producing.