KR100285716B1 - Callign line identification presentation transmision method for analog subscriver in exchange system - Google Patents

Abstract

PURPOSE: A method for transmitting a calling number to an analog subscriber in an exchange is provided to transmit a calling number to a called analog subscriber using a DTMF signal. CONSTITUTION: If a termination request is generated from a calling exchange(201), an MP(Main Processor) checks whether a called subscriber telephone is registered in a CLIP(Calling Line Identification Presentation)(202). In case that the called analog telephone is registered in the CLIP, the MP requests the calling exchange to send a calling number(204). If the calling number is received(205), the MP requests the LTSP(Local service and Time Switch Processor) of a switching circuit to seize a DTMF channel to transmit the calling number(206). If the LTSP seizes a DTMF channel, the MP transmits the calling number to the called analog subscriber by transmitting a DTMF signal to the called analog telephone through an ASI(Analog Subscriber Interface)(207).

Description

CALLIGN LINE IDENTIFICATION PRESENTATION TRANSMISION METHOD FOR ANALOG SUBSCRIVER IN EXCHANGE SYSTEM}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a public exchange, and more particularly to a technique for transmitting a calling party number (calling number) to a subscriber using an analog line so that the calling number can be displayed on the analog subscriber telephone.

In general, there are various types of exchanges, from mechanical exchanges to analog, digital, ISDN (Asynchronous Transfer Mode) and ATM (Asynchronous Transfer Mode) exchanges. In order to form a transmission path between two or more subscribers who transmit and receive voice and data information, the above-mentioned exchanges detect a connection request coming from the incoming line of the switch network, select the outgoing line, set up the incoming / outgoing route, and then enter the incoming / outgoing line. It is a device to monitor the status of, cut, charge, etc. Such exchanges require a subscriber to be exchanged, which is also distinguished according to its type. If the subscriber is an analog telephone using an analog method, in a public exchange having a conventional analog subscriber, when the called analog subscriber requests the calling party number, the calling party number is not transmitted to the called party. Only the calling party's phone number was printed. In this case, since the service is mainly used to prevent malicious calls or mischief calls, there was no function of transmitting the calling number as a DTMF signal to an actual analog subscriber.

Accordingly, an object of the present invention is to provide a method for transmitting an originating call to an analog subscriber to be received using a DTMF signal in an exchange having an analog subscriber.

In order to achieve the above object, the present invention provides a method for transmitting a calling party number to an analog subscriber in an exchange that provides a calling party transmission function. In this case, a DTMF channel is formed with an analog subscriber telephone to transmit the calling number information to the incoming analog subscriber telephone with the DTMF signal, and then releases the DTMF channel established with the analog subscriber telephone and transmits a ring. It features.

1 is a configuration diagram of the exchange period according to the present invention

2 is a block diagram of an exchange providing a call origin transmission function according to the present invention.

3 is a control flow diagram for transmitting a calling number to an exchange analog subscriber according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention, such as specific processing flows. It will be apparent to those skilled in the art that the present invention may be practiced without these specific details. Detailed descriptions of well-known functions and configurations that are determined to unnecessarily obscure the subject matter of the present invention will be omitted.

The construction of the exchange period according to the present invention is shown in FIG. Referring to Figure 1 describes the configuration of the exchange period according to the present invention,

When the calling party calls the called party, the calling party exchange 20 searches the called party number to determine whether the calling party number is a telephone number subscribed to a local station or a subscriber of another station, and if it is a subscriber of the other country, it connects to the called party exchange 100. The called side exchange 100 is configured as shown in FIG. 2 and performs the same operation as FIG. 3 when the called party is an analog phone subscribed to a Calling Line Identification Presentation (CLI). A description of the configuration of the destination side exchange 100 and the operation of the configuration section will be described with reference to FIG. 2.

2 is a block diagram of an exchange providing a call origin transmission function according to the present invention;

MP (Main Processor) 110 controls the call switching and the overall operation of the exchange system to provide a variety of services to the subscriber, the calling party (calling party telephone number if the subscriber is a subscriber subscribed to the CLIP function) Abbreviation, hereinafter referred to as calling number). In addition, the MP 110 has a ROM and a RAM therein, and stores the program and initial service data of the MP 110 for performing basic calls and various functions in the ROM, and performs the program under the control of the MP 110 in the RAM. Temporarily store data generated during the process.

The switching circuit 120 switches various tones and voice data under the control of the MP 110, and there is a Local Service & Time Switch Processor (LTSP) inside to control the transmission / reception of DTMF signals, It operates under the control of the MP 110. The subscriber circuit 150 supplies a call current to an extension subscriber (in the present invention, it is assumed to be an analog phone subscribed to the CLIP) under the control of the MP 110, and interfaces a signal between the extension subscriber and the switching circuit 120. Here, the extension refers to a line connecting the switching system and the subscriber telephone. In addition, the subscriber circuit 150 includes a processor called an ASIP (Analog Subscriber Interface Processor) to control ring transmission to a subscriber and an analog subscriber interface (ASI).

The ring generator 160 generates a ring signal and supplies the ring signal to the subscriber line. The trunk line circuit 140 forms a trunk line call loop by seizing a trunk line under the control of the MP 110, and interfaces a signal between the trunk line and the switching circuit 120. Here, the trunk line refers to a line that connects the trunk line circuit 140 and the national exchange.

The tone generator 132 generates various tone signals under the control of the LTSP located in the switching circuit and outputs them to the switching circuit 120. The dual tone multi-frequency receiver 134 outputs the DTMF signal input from the switching circuit 120 to the MP 110. The DTMF signal input to the DTMF receiver 134 through the switching circuit 120 may be a telephone number generated by the trunk line subscriber or a telephone number generated by an extension subscriber. The DTMF transmitter 136 outputs a DTMF signal to the switching circuit 120. Here, the DTMF signal output from the DTMF transmitter 136 is a telephone number of a trunk line subscriber generated when calling the trunk line side from the station side, or the call number according to the present invention. The subscriber is divided into analog telephones, which are subscribed to the CLIP and analog telephones not subscribed to the CLIP, as described above. Subscriber information according to whether or not to join the CLIP is stored in the RAM of the MP110.

With reference to Figures 1 and 2 described above, a preferred embodiment of the present invention will be described in detail based on the flowchart of Figure 3; 3 is a control flow diagram for transmitting a calling number to an exchange analog subscriber according to an embodiment of the present invention. The diagram according to the embodiment of FIG. 3 is a flowchart according to the present invention when the calling party is not a local subscriber. If the calling party is a subscriber of its own country, steps 203, 204, and 205 of FIG. 3 are omitted. In addition, the call forwarding function is performed only at the called party's exchange to the exchange analog subscriber according to the present invention.

First, in step 201, the MP 110 checks whether there is a call request. The incoming request may be a request from the originating exchange 20, or may be a request from a local subscriber. If the incoming call is requested, the flow proceeds to step 202. In step 202, the MP 110 checks whether the incoming subscriber phone is a CLIP subscribed phone and proceeds to step 204 if the incoming subscriber phone is a phone subscribed to CLIP, otherwise proceeds to step 203. After notifying the incoming call to 20, proceed to step 209. If the incoming subscriber's phone is identified as a phone subscribed to the CLIP, the MP 110 requests the calling party to the calling exchange 20 in step 204. It also informs you that the incoming call has been taken. Thereafter, if the calling number is received in step 205, the MP 110 proceeds to step 206. In step 206, the MP 110 requests the DTMF channel occupancy with the incoming analog telephone 30 to transmit the calling number to the LTSP in the switching circuit 120, and the LTSP under the control of the MP 110 occupies the DTMF channel. Form an DTMF channel with the incoming analog phone 30. Thereafter, in step 207, the MP 110 transmits the calling number to the analog subscriber 30 to be called. The originating call transmits a DTMF signal to the incoming analog telephone 30 through the incoming analog subscriber matching device (ASI) via the occupied DTMF channel through the incoming analog subscriber matching device (ASI). The DTMF signal transmitted to the incoming analog telephone 30 is a DTMF signal corresponding to the received calling number. When the transmission of the calling DTMF signal is completed, the LTSP notifies the MP110 of the completion of sending the calling number. Then, in step 208, the MP 110 releases the DTMF channel occupied with the analog telephone 30 to be received by the LTSP, and proceeds to step 209. In step 209, the MP 110 instructs the ASIP in the subscriber circuit 150 to transmit the ring to the called subscriber, and the received ASIP controls the ring generator 160 to send the ring to the subscriber 30. That is, the transmission of the information on the calling party's telephone number is to be made before sending the ring to the called party.

In summary, the present invention described above; Sending the calling party to the called party for the CLIP subscriber does all the processing at the called party's exchange where the call is received.If the calling party and the called party are subscribed to the same exchange, the exchange already knows the calling party's information. Since it is a state, there is no need to request a calling number. Also, since the incoming subscriber's phone is an analog phone, the incoming subscriber's phone is transmitted as DTMF signal to the called subscriber's phone.

On the other hand, the following conditions are required to carry out the present invention.

1. The called party's telephone shall be provided with a display to display the calling number.

2. Matching between incoming and outgoing exchange periods shall not be mechanical.

If both of the above conditions are not met, the calling number is not transmitted to the called party for the CLIP subscriber according to the present invention. If the second condition, called-to-call exchange period matching, must not be mechanical, is not satisfied, even if the called party is not CLIP-subscribed, the exchange cannot send the calling party information. A specific DTMF signal can be sent to the telephone to inform the incoming CLIP analog subscriber that the calling party information cannot be transmitted.

The caller ID information received by the CLIP analog subscriber to be received is displayed on the display unit and can be stored as necessary. In this case, if the answer to the incoming call is not possible, it is possible to make a call to the calling number displayed or stored on the display or to check the calling number after returning home.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible 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.

As described above, the present invention has the effect of providing a better service for analog subscribers in a public exchange.

Claims (5)

In a method for transmitting a calling party number from an exchange providing a calling party number transmission function to an analog subscriber telephone, When the incoming call is requested, checking whether the incoming call is an analog subscriber phone registered in the call forwarding function; When the incoming call is an analog subscriber phone registered to the calling party transmission function, forming a DTMF channel with the registered analog subscriber phone; Transmitting calling number information to the registered analog subscriber telephone through the DTMF channel; And transmitting a ring after releasing the DTMF channel formed with the registered analog subscriber telephone. 2. The analog subscriber station according to claim 1, wherein if the incoming request is not a local exchange, the calling party receives a calling number through communication with a calling exchange and transmits it to the registered analog subscriber telephone through a DTMF channel. Calling method for sending. 3. The method as claimed in claim 2, further comprising a step of notifying the calling exchange that the incoming call is occupied if the incoming request is not a local exchange. The method of claim 1, further comprising: transmitting a ring to the incoming analog subscriber telephone when the incoming call is not an analog subscriber telephone registered in the calling party transmission function when the incoming call is requested. Method of transmission of calling number for analog subscriber in exchange. The method of claim 2, further comprising a step of notifying the transmission of the calling party information through a specific DTMF channel when the calling party information cannot be transmitted to the incoming analog subscriber phone because the calling party information is not received. An originating method for analog subscribers in an exchange, characterized by the above-mentioned.

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