KR20000015155A - Method for alarming standby state when line is busy on telephone - Google Patents

Abstract

PURPOSE: A method which detects and alarms a standby state to a user when a line is busy on a telephone is provided. CONSTITUTION: A method for alarming a standby state when a line is busy on a telephone wherein the telephone includes a tone detector and a ring generator, the method comprising the steps of: (a) judging whether a calling tone is detected by means of a tone detector when a line is busy; (b) generating a ring signal for alarming a standby state by the ring generator when the line is busy when the calling tone is detected by means of a tone detector when a line is busy; and (c) transmitting the ring signal generated in step (b).

Description

How to notify you of a call waiting

The present invention relates to a telephone and, more particularly, to a method for reporting a call waiting state.

Normally, the call waiting function informs a called party by providing a busy call tone to a called subscriber when there is a call to a busy subscriber, and then when the called subscriber who listens to the busy call tone makes a hook flash, This function allows you to wait for the other party and talk to the calling party. These busy tones are generally supplied to the called party in the form of a "click" at regular intervals.

In the conventional call waiting service, when a call is received from another person during a call, the called party directly detects a call waiting signal received from the switchboard, recognizes that there is a call waiting, and presses a hook switch to change the call destination. Such a conventional telephone only listens to a call waiting signal transmitted from an exchange, and there is no method of specifically indicating a call waiting state.

As such, the subscriber applying for the call waiting service should listen to the call tone to be sent to the receiver and grasp the call waiting state. Therefore, if the user is not familiar with the call waiting function, it is difficult to accurately determine the call waiting state.

Accordingly, an object of the present invention is to provide a method for accurately detecting a waiting state of a call by detecting a waiting signal during a call in a telephone.

In order to achieve the above object, the present invention provides a call in the call through the tone detection unit in a telephone having at least a ring detection unit for detecting a call tone during a call from the exchange and a ring generation unit for generating a ring signal informing a call waiting state. When the tone is detected, the ring signal for informing the standby state of the call generated through the ring generator is output to the speaker.

1 is a schematic block diagram of a telephone to which the present invention is applied.

2 is a control flowchart for reporting a waiting state of a call in the telephone according to the present invention.

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

1 is a schematic block diagram of a telephone to which the present invention is applied, which includes a control unit 100, a memory 101, a key input unit 102, a display unit 103, a tone detection unit 104, a relay 105, a call circuit unit 106, a DTMF generation unit 107, and a DTMF receiving unit 108; The ring generator 109, the receiver 111, the receiver 112 and the speaker 113.

Referring to Fig. 1, a schematic operation of the telephone according to the present invention will be described. The controller 100 is a microprocessor and controls the overall operation of the telephone according to the present invention. The memory 101 stores control programs and data of the control flow as shown in Fig. 2 for controlling the operation of the telephone according to the present invention. The key input unit 102 includes keys for setting various functions and modes and numeric keys for performing a dialing function, and outputs key data corresponding to a key pressed by the user to the controller 100. The display unit 103 may be implemented as an LCD (Liquid Crystal Display), and displays the state of the telephone according to the present invention under the control of the control unit 100. The tone detector 104 is connected to the telephone line and detects a call tone signal during a call input to the telephone line in an on-hook state and notifies the controller 100. The relay 105 includes a hook switch and performs switching to form and block a call path between the telephone line and the telephone under the control of the controller 100. The call circuit 106 is a voice circuit, which is connected between the relay 105, the talker 111, and the receiver 112, and processes various tone signals and voice signals transmitted and received through the telephone line. The DTMF generation unit 107 is connected between the control unit 100 and the call circuit unit 106, converts the data output from the control unit 100 into a DTMF (Dual Tone Multi-Frequency) signal and outputs it to the call circuit unit 106. The DTMF receiving unit 108 is connected between the call circuit unit 106 and the control unit 100, converts the DTMF signal output from the call circuit unit 106 into digital data and outputs the digital data to the control unit 100. The ring generator 109 generates a ring signal for notifying of a call waiting state according to the present invention under the control of the controller 100 and outputs the ring signal to the speaker 113. The transmitter 111 and the receiver 112 are connected to the call circuit 106 and may be a handset.

2 illustrates a process of notifying of a call waiting state in a telephone according to an embodiment of the present invention.

A method of notifying of a call waiting state in a telephone according to the present invention will be described with reference to FIGS. 1 and 2. In step 210, the controller 100 determines whether a call tone during a call is detected from the tone detector 104 in step 220. If it is determined in step 220 that a call tone is detected during a call, in step 230, the controller 100 generates a ring signal for notifying of a call waiting state by controlling the ring generator 109. In step 240, the controller 100 controls the ring generator 109 to transmit a ring signal for notifying of the waiting state of the call generated to the speaker 113. The ring signal for informing a call waiting state according to the present invention is distinguished from a ring signal transmitted when a general incoming call is received. In addition, the controller 100 may output a message for notifying the waiting state of the call to the display unit 103. Accordingly, the user may hear a ring signal for notifying the waiting state of the call transmitted from the speaker 113 or seeing a message for notifying the waiting state of the call output to the display unit 103, indicating that the waiting state of the call has occurred. In step 250, the control unit 100 monitors the relay 105 and determines whether a call switch request is made from the counterpart on the call to the counterpart waiting for the call. When the hook switch is pressed under the call waiting state, it is determined that the call switch request is made. In step 260, the controller 100 forms a call path with the counterpart waiting for the call through the call circuit unit 106.

As described above, the present invention enables the user to easily detect the waiting state by detecting a ring tone during a call and transmitting a ring signal for informing the waiting state.

Claims (2)

In the method of notifying a call waiting state in a telephone having at least a tone detecting unit and a ring generating unit, A first process of determining whether a call tone during a call is detected through the tone detecting unit during a call; A second process of generating a ring signal for notifying of a call waiting state through the ring generation unit when the call tone during the call is detected; And a third process of transmitting the ring signal generated in the second process to a speaker. The method of claim 1, The ring signal for notifying the waiting state of the call is distinguished from the ring signal for notifying the incoming call.