KR100312183B1 - Redialing method in isdn terminal - Google Patents

Abstract

PURPOSE: A redialing method in an ISDN terminal is provided to store more than two phone numbers in an identical address in order to automatically dial another stored phone number when a busy signal is received from the other side. CONSTITUTION: If an abbreviated dial signal to call a specific person is inputted from a keypad part, a control part reads a phone number stored in a relevant address from a memory part and sends it to an ISDN through an interface part after executing the first or second layer protocol(S201). The control part analyzes a signal received from the other side terminal through the interface part. If a busy tone or a release signal is detected(S202), the control part analyzes the same address and judges whether other phone numbers are stored(S203). In case that other phone numbers are stored in the same address, the control part reads a new phone number, automatically dials the phone number, and sends it to the ISDN through the interface part(S204,S205).

Description

How to Redial an ISDN Terminal

1 is a block diagram of an ISDN terminal according to the present invention.

2 is a flow chart for storing a telephone number in the present invention shown in FIG.

3 is a flow chart for performing redialing in the present invention shown in FIG.

<Description of the symbols for the main parts of the drawings>

10: interface unit 20: HDLC (High level Data Line Control)

30 control unit 40 memory unit

50: backup power supply 60: keypad

70: display unit

The present invention relates to an ISDN terminal, and in particular, when a telephone number of a company or a public place using two or more telephone numbers is stored at the same address, and a call is received using a speed dialing, when a busy signal is received from the other terminal. The present invention relates to a redialing method of an ISDN terminal that attempts to connect to a call by automatically dialing another telephone number stored in the same address.

In the conventional terminal, when a user attempts to make a call connection with a specific counterpart's terminal, when a busy signal is received from the counterpart's terminal, a redial key is secured by driving a redial key after a predetermined time and then dialed for the first time by driving a redialing key. Attempt to connect to one phone number or to another phone number using keypad.

In addition, as a complementary system, when a busy signal is received from the other terminal requesting a call connection, an apparatus for repeatedly attempting a call connection by redialing the first dialed telephone number by the system itself has been used.

Such a conventional terminal repeatedly redials only the first dialed telephone number, so when the handset of the opposite terminal is misplaced or the call is long, it takes a lot of time for the call connection, and the user is uncomfortable, and the call is made to another telephone number. When attempting to connect, there is a problem that the user has to dial a new phone number through the keypad.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and an object thereof is to store two or more telephone numbers used in a company or a public place at the same address of a memory means, and make a call from a counterpart terminal during a speed dialing connection. When receiving a signal, it automatically dials another phone number stored at the same address to provide convenience and reliability in a call connection.

A feature of the present invention for achieving the above object is, in the redialing method of the ISDN terminal, a telephone number storing process for storing a plurality of telephone numbers for the same counterpart input through the key input means in the same address of the memory means and; And dialing the other party, and automatically re-dialing the phone numbers stored in the address one by one.

The storing of the telephone number may include switching to a speed dial input mode according to a command input through a key input means and receiving an address of a memory means through the key input means. Displaying the number on the display means and displaying the first telephone number stored at the corresponding address on the display means; adding, deleting, storing, and storing the telephone number for the address according to a command input through the key input means; And confirming scrolling.

The dialing process may include dialing one telephone number stored in an address to the counterpart when a speed dial signal for a counterpart call is received through the key input means, and transmitting a signal to the counterpart from the counterpart. If is detected, automatically redialing another telephone number stored in the address.

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

FIG. 1 is a block diagram of an ISDN terminal according to the present invention, FIG. 2 is a flow chart for storing a telephone number in the present invention shown in FIG. 1, and FIG. 3 is a redialing in the present invention shown in FIG. This is a flowchart to perform.

As can be seen in FIG. 1, the ISDN terminal according to the present invention includes an interface unit 10, an HDLC 20, a control unit 30, a memory unit 40, a backup power supply unit 50, and a keypad unit 60. And a display unit 70. The interface unit 10 interfaces with data of a first layer and a second layer, which are connected to an ISDN network and transmit / receive with a counterpart terminal connected to a call. The HDLC 20 controls a protocol for data transmission and reception of the first layer and the second layer. The control unit 30 controls the overall operation of the ISDN terminal use, such as automatic redialing of a new telephone number when a busy signal is detected from a communication terminal of a communication terminal and attempted connection of data to be transmitted and received. The memory unit 40 stores program data necessary for operating the ISDN terminal, and stores predetermined number telephone number data of the counterpart terminal according to the control signal of the controller 30 at the same address. The backup power supply 50 supplies the backup power to prevent the loss of data stored in the memory 40 when the main power supply of the ISDN terminal is stopped. The keypad 60 is composed of ten keys 0 to 9 and predetermined function keys, and generates a digit signal selected by a user and applies it to the controller 30. The display unit 70 displays the overall operation state of the ISDN terminal use and the phone number of the counterpart terminal selected by the keypad unit 60.

Referring to FIG. 2, an operation of storing a counterpart terminal phone number of the present invention configured as described above is as follows.

When the user inputs a mode selection signal for storing the telephone number of the other party's terminal through the keypad unit 60, the controller 30 switches to the speed dial input mode according to the input key signal and displays the mode state at the same time. Is instructed to the user (step 101). Thereafter, the user checks the display unit 70 and designates the address of the memory unit 40 through the keypad unit 60 (step 102). When the address of the memory unit 40 is designated as described above, the number of phone numbers stored in the corresponding address is displayed to the user through the display unit 70 (step 103), and the first phone number stored in the corresponding address is displayed on the display unit ( 70) (step 104).

Thereafter, the control unit 30 detects a key signal input to the keypad unit 60 (step 105), and the key signal input in step 105 is a "*" key signal for deleting the telephone number displayed in step 104. The controller 30 deletes the displayed telephone number from the predetermined address of the memory unit 40 (step 106), decrements one from the number of telephone numbers stored in the address, and executes step 105 (step 107). . If the key signal input in step 105 is a scroll key signal for checking the telephone number stored in the assigned address, the controller 30 reads the next telephone number digit from the assigned address of the memory unit 40. After displaying to the user via the display unit 70 (step 114), the step 105 is executed. If the key signal input in step 105 is a program (PGM) key signal for ending the speed dial input mode, the speed dial input mode ends after the storage of the other party's telephone number is completed (step 113). If the key signal input in step 105 is a key signal (#) to store the telephone number input to the address assigned to the memory unit 40, the telephone number input through the keypad unit 60 is increased to the corresponding address. After storing (step 108), it is detected whether or not the maximum number of telephone numbers that can be stored at the address is stored (step 109). If the counterpart phone number can be stored continuously in the detection of step 109, the telephone number to be input is stored (step 110), and step 105 is executed. If there is no area that can be stored in the address allocated in step 109, a message indicating that the user cannot input a phone number is notified to the user through the display unit 70, and then the number of stored phone number variables is reduced and the step 105 is executed.

The automatic redialing operation in the state where the speed dial storage of the other party's phone number is completed as described with reference to FIG. 3 is as follows.

When a speed dial signal for calling a specific partner is input from the keypad unit 60, the controller 30 reads the telephone number stored in the corresponding address from the memory unit 40, and then reads the first or the second number through the interface unit 10. After the protocol of the second layer is performed, it is sent to the ISDN network (step 201). Then, the controller 30 analyzes a signal received from the opposite terminal through the interface unit 10 and detects a busy tone that is being used by the opposite terminal or detects a release signal for connection failure (step 202). The same address of the memory unit 40 is analyzed to detect whether or not another telephone number is stored (step 203). If another telephone number is stored in step 203, the variable for transmitting the telephone number is increased to read a new telephone number and then automatically dials the read telephone number to the ISDN network through the interface unit 10 (step 204, step). 205) Then, when the call path is connected to the user of the opposite terminal, the call is performed.

The operation as described above is repeatedly executed until a call path with the opposite terminal is formed.

As described above, the ISDN terminal according to the present invention stores a speed dialed telephone number stored in a stored address when a busy tone is detected from a specific counterpart dialed to call or a release signal that fails to call is detected. Redialing with a new phone number eliminates unnecessary actions to connect to a call, providing convenience for use.

Claims (3)

A redialing method of an ISDN terminal, comprising: a telephone number storing step of storing a plurality of telephone numbers for the same counterpart inputted through a key input means at the same address of a memory means; And dialing the phone number stored in the address one by one to automatically redial if the other party dials the call. The method of claim 1, wherein the storing of the telephone number comprises: switching to a speed dial input mode according to a command input through a key input means and receiving an address of a memory means through the key input means; Displaying the number of stored telephone numbers on the display means, and displaying the first telephone number stored on the corresponding address on the display means, and adding and deleting telephone numbers with respect to the address according to a command input through the key input means. And storing, and scrolling confirmation. The method of claim 1, wherein the dialing process comprises: dialing one telephone number stored in an address when the speed dial signal for a counterpart call is received through the key input unit, and transmitting the dialed number to the counterpart; And redialing another telephone number stored in the address when a signal related to the failure is detected.