KR19990020282A - Design service method using Diady trunk in private exchange system - Google Patents

Abstract

end. FIELD OF THE INVENTION The claimed invention belongs to:

Direct Inward Dialing (DID) trunk is a technology that services the DISA (Direct Inward System Access) function in a private exchange system.

I. The technical problem to be solved by the invention:

When there is a call that is received through DID trunk of private exchange system, if it is registered as DISA number, all functions provided by private exchange system can be serviced.

All. Summary of the Solution of the Invention:

When there is a call received from the external trunk line through the DID trunk, the digit of the incoming signal is analyzed and the DISA function is serviced if it is registered with the DISA number.

la. Important uses of the invention:

Applies to private exchange system.

Description

Design service method using Diady trunk in private exchange system

The present invention relates to a method for servicing a DIDA function in a private exchange system, and more particularly, to a method for servicing a direct inward system access (DISA) function using a direct inward dialing (DID) trunk in a private exchange system.

Normally, private exchange system uses MFC, Decaclic or MR2MFC when the telephone line is connected by C.O and DID trunk. The number of digits transferred from the CO line to the private exchange only delivers the length determined by the prior appointment. This makes it possible for some subscribers of the CO line to call a specific extension of the private exchange system, but cannot use many of the functions provided by the private exchange system. For example, as shown in FIG. 1, the subscriber A can call the subscriber B of the first private exchange 100, but the access code of the first private exchange 100 and the access code of the first private exchange 100 may be used to call the subscriber B of the second private exchange 102. The access code of the second private exchange 102 and the serial number of the subscriber C should be dialed. In addition, the access code of the second private exchange 102 and the unique number of the subscriber C should be sent from the local exchange 104 to the first private exchange 100, which cannot transmit all these digits.

Accordingly, an object of the present invention is to provide a method for servicing a DISA function using a DID trunk in a private exchange system.

The present invention for achieving the above object is characterized in that when there is a call that is received from the external trunk line through the DID trunk analyzes the digits of the incoming signal is registered with the DISA number service the DISA function.

1 is a network connection diagram of a general trunk line and a private exchange period

2 is a block diagram of a private switching system to which a DID trunk is connected according to an embodiment of the present invention.

3 is a block diagram of a DISA number registration table according to an embodiment of the present invention;

4 is a control flow diagram for performing a DISA function using a DID trunk according to an embodiment of the present invention.

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

2 is a block diagram of a private switching system to which a DID trunk is connected according to an embodiment of the present invention.

The central processing unit 10 controls the call switching by accessing a preset program, and sends out a voice guidance message for inputting various services and passwords, and controls the DISA function to be serviced for a call received by the DID trunk 30. . The memory unit 12 includes ROM and RAM, and includes the program initial service data for performing a call and various functions, and temporarily stores data generated during program execution. The trunk line circuit 14 forms a trunk line loop by scissoring the trunk line in response to the control of the central processing unit 10, and interfacing the incoming signal from the trunk line. The station circuit 16 supplies the voice current in the voice band to the subscriber's key phone and the general telephone, and performs interfacing between the station telephone and the main device. The switching circuit 18 switches various tones and voice data under the control of the CPU 10. The tone generator 20 generates the various tone signals in response to the control of the CPU 10 and provides them to the switching circuit 18. The ring generator 22 supplies a square wave shaped ring signal to the switching circuit 18 in response to the control of the CPU 10. The DTMF transmitter 24 outputs a DTMF (Dual Tone Multi Frequency) signal under the control of the CPU 10. The DTMF receiver 26 analyzes the dual tone multi frequency (DTMF) received from the subscriber of the extension circuit 16 and applies corresponding digit data to the CPU 10. The voice memory 32 is made of SRAM and stores a voice prompt message for inputting a password. DID trunk 28 is a trunk that receives the called number from the local switching center (telephone station) and directly connects the subscriber. The voice synthesizing unit 30 synthesizes voice data stored in the voice memory 30 under the control of the central processing unit 10 and transmits the voice data to the trunk line subscriber C through the switching circuit 18 and the DID trunk 30.

3 is a block diagram of a DISA number registration table according to an embodiment of the present invention.

4 is a control flowchart for performing a DISA function using a DID trunk according to an embodiment of the present invention.

1 to 4 will be described in detail a preferred embodiment of the present invention.

The telephone number for servicing the DISA function through the DID trunk 28 is stored in a specific area of the memory unit 12 as shown in FIG.

Referring to the flowchart of FIG. 4, an operation of serving a DISA function when there is an incoming call through a DID trunk 28 after registering a telephone number capable of DISA service as described above will be described. If there is an incoming call, the process proceeds to step 102. In step 102, the central processing unit 10 receives the digit input from the local exchange and proceeds to step 103. In step 103, the CPU 10 checks whether the digit has been received. If the digit reception is completed, the CPU 10 proceeds to step 104. In step 104, the central processing unit 10 searches the DISA number registration table of FIG. 3 and checks whether it is a DISA number, performs a general function if it is not a DISA number, and proceeds to step 105 if it is a DISA number. In step 105, the CPU 10 transmits a response signal through the DID trunk 28, and proceeds to step 106. In step 106, the CPU 10 connects the DTMF receiver 26 and the DID trunk 28 by controlling the switching circuit 18. In step 107, the central processing unit 10 checks whether a password is registered and proceeds to step 104 if a password is not registered. In step 104, the central processing unit 10 transmits a voice message to the caller through the switching circuit 18 and the DID trunk 28 to control the voice synthesis unit 30 to start the DISA function. In step 115, the service is controlled to receive the corresponding function. However, if the password is registered in step 107, the process proceeds to step 108, and the central processing unit 10 controls the voice synthesis unit 30 to read the voice message requesting the input of the password stored in the voice memory 32, and synthesizes and transmits the voice. . The caller then hears this message and enters a password. Then, in step 109, the CPU 10 receives the password through the DTMF receiver 26. At this time, the password consists of 8 bytes. Then, in step 110, the CPU 10 checks whether the 8-byte password is completed. If the reception is not completed, the CPU 10 returns to step 109 to continue receiving the password, and if the password is completed, proceeds to step 111. . In step 111, the central processing unit 10 checks whether the received password matches a previously registered password, and proceeds to step 112 if the password does not match. In step 112, the central processing unit 10 checks whether the maximum number of requests for a password is reached. If the maximum number of requests is reached, the CPU 10 performs error processing. In step 113, the password inputted by the caller is input again, and the operation returns to step 109. However, if the password matches in step 111, the process proceeds to step 114. The central processing unit 10 controls the voice synthesizer 30 to synthesize the voice message of the DISA function start stored in the voice memory 32, and sends the voice message to the caller through the DID trunk 28. do. Then, in step 115, the central processing unit 10 controls to service the corresponding function desired by the caller. The caller can then

As described above, when the call is received through the DID trunk in the private exchange system, when the call is registered with the DISA number, the function provided by the private exchange can be serviced.

Claims (3)

In a method of designing a DISA function using a DID trunk in a private exchange system, DISA function service method using a DID trunk in a private switching system, characterized in that when there is a call received through the DID trunk from an external trunk line, the digit of the incoming signal is analyzed and registered with the DISA number. In a method of designing a DISA function using a DID trunk in a private exchange system, Receiving a digit for a telephone number when there is a call received from the DID trunk; When the received telephone number is registered as a DISA number, sending a response signal to a caller and requesting input of a password to receive a password; DISA function using a DID trunk in a private exchange system, wherein a voice message for initiating the DISA function is transmitted to the caller and the corresponding service is performed when the received password matches a previously registered password. How to service. The method of claim 2, The request for inputting the password is a DISA function service method using a DID trunk in a private switching system, characterized in that a voice message for inputting a password is sent to the caller.