KR100285683B1 - Automatic redialing method in communication equipment using public communication network - Google Patents

Abstract

PURPOSE: An automatic redialing method in a communication equipment using a public communication network is provided to automatically seize a trunk again if a busy tone is supplied after dialing, to inform a user that redialing is in process while executing redialing through the seized trunk, and to execute the redialing process repeatedly if a busy tone is supplied again after redialing. CONSTITUTION: A telephone is composed of a busy tone detection part(5), a keypad part(1), a dialing part(2), an LED part(7), a speaker driving part(6), a trunk interface part(4), and a CPU(3). The busy tone detection part(5) detects a busy tone and converts it into a digital signal. The keypad part(1), containing numeric keys and function keys, outputs key input information, based on key input. The dialing part(2) sends a dial pulse or a DTMF signal according to key input information by numeric key input. The LED part(7) lights on and off the LED. The speaker driving part(6) amplifies a dialing signal or a busy tone and outputs it to a speaker(S). The trunk interface part(4) selectively connects between the dialing part(2) and a trunk or between the speaker driving part(6) and the trunk. The CPU(3) receives the key input information output of the keypad part(1) and drives the speaker driving part(6) and the LED part(7). Also the CPU(3) controls the connection operation between the dialing part(2) and the trunk or between the speaker driving part(6) and the trunk.

Description

Automatic Redialing Method in Communication Device Using Public Communication Network

1 is a simplified configuration diagram of a telephone for explaining the present invention.

2 is a flowchart showing an automatic redial process according to the present invention.

* Explanation of symbols for main parts of the drawings

1: keypad 2: dialing

3: CPU 4: Trunk Line Connection

5: busy tone detection unit 6: speaker driving unit

7: LED part 10: telephone

S: Speaker

The present invention relates to a transmission method in a communication device using a public communication network, and in particular, when the other communication device is in communication after the transmission, it automatically performs a redial, at the same time notifies the user of the redialing, and even after the redial communication a certain number of times The present invention relates to an automatic redial method in a communication device using a public communication network that repeatedly performs a redial operation.

In general, a communication device using a public communication network such as a telephone dials a specific number for a call with a counterpart communication device, and when a busy tone is applied through the handset, the handset is on-hook and off-hook again, and then a redial key is input. Or, it is common to perform redial by inputting a redial key while the handset is on hook.

However, in such a redial method, the user must listen to a busy tone and then re-occupy the CO line and enter the redial key, and when the user is in a call again after redialing, the above process must be repeated again, resulting in inefficient and cumbersome problems. There is no choice but to have.

An object of the present invention to solve this problem is to automatically re-occupy the CO line when a busy tone is applied after dialing, and to redial through the re-occupied CO line and to notify the user that it is redialing, even after redialing. The present invention provides an automatic redialing method in a communication device using a public communication network that repeats the redialing process a predetermined number of times when a busy tone is applied due to a busy line.

A feature of the present invention for achieving the above object is a retransmission method when a counterpart wishing to communicate in a communication device using a public communication network is connected to any communication device connected to the public communication network. A first step of transmitting a specific signal for calling any desired counterpart communication device, a second step of storing the specific signal transmitted in the first step if the counterpart communication device does not answer the call; A third step of re-occupying the public communication network and retransmitting a specific signal stored in the second step through the occupied public communication network; and the number of times that the third communication device is transmitted in the third step when the call is not answered. A fourth step of determining whether has reached the set value, and if the number of transmissions has not reached the set value in the fourth step, The fifth step is to proceed.

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

1 is a simplified configuration diagram of a telephone for explaining the present invention, and includes a busy tone detection unit 5 which detects a busy tone, converts it into a digital signal, and outputs the number. A keypad unit 1 for outputting predetermined key input information and a dialing unit 2 for transmitting dial pulses or DTMF signals according to key input information by numeric key input among key input information output from the keypad unit 1; And a LED unit 7 for blinking the LED, a speaker driver 6 for amplifying a signal by dialing or a sound during a call and outputting it to the speaker S, a dialing unit 2, a trunk line or a trunk line; The trunk line connecting unit 4 for selectively connecting the speaker driver 6 side, and the key input information output of the keypad unit 1 are applied to operate the speaker driver 6 and the LED unit 7, and the trunk line connecting unit 4 CO line and dialing part (2) or CO line and speaker It consists of a CPU 3 which controls the connection operation between the eastern part 6.

Referring to the flow chart shown in Figure 2 attached to the re-routing process according to the present invention in the phone configured as described above are as follows.

When the user of the telephone 10 off-hooks the handset to occupy the trunk line and inputs the telephone number of the other telephone using the keypad 1, the keypad 1 dials predetermined key input information according to the input telephone number. (2) and the CPU 3, the CPU 3 judges whether or not the predetermined key input information output from the keypad 1 is caused by telephone number input (step S1).

In step S1, when the CPU 3 determines that the predetermined key input information output from the keypad unit 1 is the predetermined key input information by telephone number input, the CPU 3 operates the dialing unit 2, and the trunk line and the dialing unit. The trunk line connecting portion 4 is controlled so that (2) is connected to each other. Thereafter, the dialing unit 2 generates DTMF or dial pulses according to the key input information transmitted from the keypad unit 1, and outputs the DTMF or dial pulses to the trunk line connecting unit 4, and the output DTMF or dial pulses outputs the trunk line connecting unit 4. It is sent to the trunk line via (step S2).

If the busy tone is applied to the telephone 10 through the trunk line because the other telephone is busy after the call is made to the other telephone, the busy telephone detects the busy tone and detects the busy tone by the CPU 3. Since the predetermined busy signal is output to notify that the user is busy, the CPU 3 determines whether the other party's telephone is busy according to the busy signal output of the busy tone detection unit 5 (step S3).

When the busy signal output from the busy tone detection unit 5 is applied to the CPU 3 in step S3, the CPU 3 stores the telephone number that was sent in step S2 (step S5). After that, the re-dial number N is initialized in step S6, and the transmission time T is initialized in step S7.

After the step S7, the duration of the busy signal output from the busy tone detection unit 5 is checked to determine whether a predetermined time has elapsed, that is, whether the transmission time T has reached a set time (step S7). S8). If it is less than the set time in step S8, the flow advances to step S9 to determine whether the other party is busy. If the call is in progress, the transmission time T is increased by a predetermined value in step S10 and the process proceeds to step S8 again.

If the transmission time T reaches the set value in step S8, the flow advances to step S11 to increase the re-dialing frequency N to a predetermined value and proceed to step S12. In step S12, the CPU 3 operates the dialing unit 2 and the speaker driver 6, and controls the trunk line connecting unit 4 so that the trunk line, the speaker driver 6, and the dialing unit 2 are connected to each other. Control the trunk line connection unit 4 to reoccupy the trunk line, and supply the telephone number stored in the step S5 to the dialing unit 2 to perform the redial operation.

If it is determined in step S13 that the re-call party is busy and determines that the call is in progress, the flow proceeds to step S14 to determine whether the re-dial number N has reached the set value, and if the set number has not reached the step S8. By repeating the above-described operation, if the re-dialing frequency N reaches the set value, the process proceeds to step S15 to release the trunk line and ends all the operations.

As described above, the automatic redialing method according to the present invention allows the telephone user to occupy the CO line directly and perform the redial operation by the predetermined number of times even when the phone is occupied by the CO line occupancy until the redial operation and the redial notification and the busy call after the redial. Since it repeats, it has the effect of increasing the convenience of the call, and this automatic redial method has the advantage that it can be easily applied to most communication devices using public communication networks such as wired and wireless phones or FAX or cellular phones.

Claims (1)

A retransmission method when a counterpart wishing to communicate in a communication device using a public communication network is in communication, wherein any communication device connected to the public communication network calls a specific signal for calling any counterpart communication device wishing to communicate. A first step of sending; A second step of storing, by the counterpart communication device, a specific signal transmitted in the first step when there is no response to the call; Re-occupying the public telecommunication network and re-sending a specific signal stored in the second step through the occupied public telecommunication network; A fourth step of determining whether the number of times transmitted in the third step reaches a set value when the counterpart communication device does not answer the call; and the third step if the number of times of originating in the fourth step does not reach the set value And a fifth step of proceeding to the automatic re-sending method in the communication device using the public communication network.