KR100407347B1 - Device for safety calling occasion system halt in complex phone and method thereof - Google Patents

Abstract

In hybrid phones equipped with at least two processors, a higher level main controller provides a call stabilization device to perform basic phone functions even when the system is stopped. The call stabilization apparatus has a keyboard provided with a plurality of keys to generate a number selection signal and a character selection signal. In the normal operation, the main controller of the upper level generates and outputs a watchdog pulse of a predetermined period by a preset program, and generates control data corresponding to the key selection signal output from the keyboard. The lower level sub-controller operates as a slave of the main controller by activating the watchdog pulse, generates a signal corresponding to the control data, and controls an internal trunk line connection unit and an audio circuit to form a voice call loop. In addition, the sub-controller is operated in a telephone control mode that can operate independently by the deactivation of the watchdog pulse to control the trunk line connection unit and the audio unit to form a voice call loop.

Description

DEVICE FOR SAFETY CALLING OCCASION SYSTEM HALT IN COMPLEX PHONE AND METHOD THEREOF}

The present invention relates to a telephone apparatus, and more particularly, a basic telephone operation even when a system stoppage occurs in a composite telephone apparatus configured to provide at least two processors to provide a service of another function in addition to a voice call function through a public telephone network or the Internet. The present invention relates to a call stabilization apparatus and a control method configured to perform the same.

In general, a telephone apparatus is used as a basic apparatus for exchanging voice signals with a counterpart through a public telephone network or the Internet. Such telephone apparatuses are currently being implemented to enable the transmission and reception of e-mail and SMS (Short Message Service) messages due to the advancement of technology related to the Internet. In order to send and receive e-mail and SMS messages in a wired telephone terminal, use of at least two processors is inevitable. This is because, in addition to a voice call function, a distributed resource controller for controlling a URL (Uniform Resource Locator), a mail account, SMS message generation, and a modem can be efficiently controlled.

As an example of such a complex phone, Patent Application No. 2001-61064 filed on September 29, 2001 by the applicant of the present application (e-mail service system and method using a telephone number and a telephone using the same) is a representative example. Yes. After reviewing the contents of the prior application, the main controller controls the overall operation of the composite telephone by controlling a sub-controller (hereinafter referred to as an "SMS processing unit") for performing various controls necessary for a voice call, and sending e-mail and SMS messages. It consists of the main controller. The sub-controller as described above controls the basic operation of the phone, performs operations such as generation of DTMF (Dual Tone Multi-Frequency) corresponding to selection of numeric keys and detection of ring signals, and under the control of the main controller. Has the ability to generate SMS messages. The main controller also controls e-mail, SMS generation control and modem operation.

In such a composite telephone, the upper level processor of the two processors is configured to monitor and control the operation of the lower level processor. Therefore, when the main processor is halted due to some cause, the sub-controller controlling the telephone circuit is not operated, and thus a basic voice call cannot be made. For example, if a system halt or a CPU halt of the main controller occurs while a voice call is made with the other party using a hybrid telephone apparatus having two processors, The entire device suddenly stops working, which causes problems with basic telephony. When the system stop occurs as described above, the system can be called by selecting the system reset button to initialize the system or rebooting the system by turning off the power switch to re-booting the system.

Accordingly, an object of the present invention is to allow a basic call to be made by a lower processor that controls a voice telephone circuit even when a phenomenon in which the processor controlling the overall operation of the telephone apparatus during a call occurs in a composite telephone apparatus having at least two processors occurs. The present invention provides a call stabilization apparatus and a control method thereof.

It is another object of the present invention to detect a system stop state by monitoring an operating state of an upper processor in charge of a main control unit of a telephone apparatus in a composite telephone apparatus having at least two processors, and automatically detecting a basic state in response to the detection. The present invention provides a call stabilization apparatus and a control method for controlling a basic call function by transitioning to a call control mode.

The present invention for achieving the above object, the keyboard is provided with a plurality of keys for generating a numeric selection signal and a character selection signal; A main controller for generating and outputting a watchdog pulse of a predetermined period and generating control data corresponding to a key selection signal output from the keyboard; In response to activation of the watchdog pulse, the controller operates as a slave of the main controller to generate a signal corresponding to the control data to control an internal trunk line connection and an audio circuit to form a voice call loop, and to deactivate the watchdog pulse. And a telephone circuit having a sub-controller for generating a voice call loop by generating a signal corresponding to a key selection signal input by being operated in a telephone control mode by the controller and controlling the trunk line connection unit and the audio unit. It is characterized in that the call stabilization device when the system stops in the hybrid telephone.

Another object of the present invention for achieving the above object is a telephone interface connected to a telephone line to form a call loop under predetermined control, and to transmit various signals to the telephone line, and a DTMF signal corresponding to an input of control data. A sub-controller that generates and provides the telephone interface to the telephone interface, detects a ring signal input to the telephone interface, generates and outputs a watchdog pulse of a predetermined period, and transmits control data corresponding to the input key selection signal to the sub-controller. A control method of a composite telephone apparatus having a main controller for supplying; The sub-controller may include: searching an activation state of a watchdog pulse of the main controller; In response to activation of the watchdog pulse, a control signal corresponding to data is provided to the control unit output from the main controller to the telephone connection circuit unit, and in response to deactivation of the watchdog pulse, the control unit transitions to a preset telephone control mode. And providing a control signal corresponding to the key selection signal to the telephone connection circuit unit.

1 is a block diagram of a composite telephone apparatus constructed in accordance with a preferred embodiment of the present invention.

2 is a flowchart illustrating an operation state of a phone control mode of a lower processor according to upper processor monitoring according to an exemplary embodiment of the present invention.

DETAILED DESCRIPTION In the following detailed description of preferred embodiments of the present invention, when it is determined that detailed descriptions of related well-known functions or configurations may unnecessarily obscure the subject matter of the present invention, detailed descriptions thereof will be omitted.

1 is a block diagram of a composite telephone apparatus constructed in accordance with a preferred embodiment of the present invention. Referring to FIG. 1, a trunk line connecting unit 24 is connected to a full-wave rectifying unit 22 that is connected to a telephone line CO and polarizes a loop voltage, and a sub controller 26 and an audio DAA (Discrete Analog Access) 28 are connected through the trunk line connecting unit 24. Modem 16 is connected via modem DAA 18. The modem 16 is connected to the main controller 14 to perform data communication over the telephone line under its control. The trunk line connecting unit 24 forms a call loop or the like like a normal telephone to interface frequencies of a voice signal band. Modem DAA 18 is a modem interface connected between modem 16 and CO line 24 to provide an interface between modem 16 and telephone line CO. The sub controller 26 is connected to the trunk line connecting unit 24 under the control of the main controller 14 to perform SMS message communication, and generates DTMF and transmits the DTMF to the telephone line through the trunk line connecting unit 24. The sub control unit 26 can be implemented using the TCC120, a chip produced by Telechips in Korea. The audio DAA 28 is an audio interface connected to a trunk line connection unit 24, the sub controller 26, and a handset 30 which is a voice signal input / output device and performs voice signal transmission / reception processing according to a telephone call through a telephone line. The indicator 20 displays various information for e-mail and SMS message communication and telephone call under the control of the main controller 14. The keyboard 32, which is a key input device, is a character input device having keys for character input and provides key input according to a user's key operation to the main controller 14 and the sub controller 26. The memory 15 shown in FIG. 1 stores program data required for the main controller 14 and stores and outputs temporary data.

In the above configuration, when the initial power-on reset operation is performed and is normally operated, the main controller 14 activates a watch dog pulse stream having a predetermined period and provides the sub-controller 26. This watchdog pulse stream is masked programmatically in the ROM region in the main controller 14 so that it continues to occur when the main controller 14 operates normally. In addition, the sub-controller 26 is programmed to be connected to the watchdog pulse output terminal of the main controller 14 and to monitor the watchdog pulse stream outputted therefrom and to transition to the telephone control mode independently of the control of the main controller 14 in an error state. have.

At this time, the sub-controller 26 is selectively operated by either the power supply voltage supplied from the outside of the telephone apparatus or the loop voltage output from the full wave rectifier 22, and the operation by the input of the loop voltage is NPO (No Power Operation). Mode is operating. The description of the NPO mode will be omitted, and the description of the NPO mode is described by the inventor of the present invention, Lee Hye-jeong and one other person, and the contents of the patent application No. 2001-000000 filed on October 00, 2001 by the present applicant. Please see.

In addition, in the configuration of FIG. 1, reference numeral 12 denoted by a dotted line corresponds to a telephone circuit capable of performing the same function as a general telephone, and the main controller 14, the modem 16, and the modem DAA 18 are connected to the telephone circuit to receive data. The telephone line CO has a function of transmitting and receiving. The configuration except for the sub controller 26 in the telephone circuit 12 corresponds to the telephone interface. In the present invention, the description of the data communication and the general telephone function will be omitted. Only when the main controller 14 is in the system halt, the sub-controller 26 switches the control mode to the telephone control mode to control the telephone circuit 12. It should be noted that only the procedure is described in detail.

2 is a flowchart illustrating an operation state of a phone control mode of a lower processor according to upper processor monitoring according to an exemplary embodiment of the present invention.

Before describing the present invention in detail with reference to FIGS. 1 and 2, the main controller 14 and the sub controller 26 shown in FIG. 1 are operated in a normal state so that the sub controller 26 is controlled by the main controller 14. It is a state which controls 12, and it demonstrates on the assumption that the operation state of the telephone circuit 12 is a busy state.

When the two processors operate normally, the main controller 14 transmits the watchdog pulse stream 34 having a predetermined period to the sub controller 26 by a preset program. The watchdog pulse stream 34 may be generated by a program, but may be generated by hardware if necessary. At this time, the sub controller 26 reads the watchdog pulse output terminal of the main controller 14 at a predetermined period and monitors the state of the watchdog pulse stream 34 outputted therefrom. For example, it is checked whether the level of the watchdog pulse is swinging and active. When the watchdog pulse stream is determined to be normal in the search, the sub-control unit 14 generates various control signals according to the control data output from the main controller 14 to control the trunk line connection unit and the audio DAA 28 to control the telephone circuit 12.

If, for some reason, the operation of the main controller 14 is stopped due to the occurrence of a system halt, the operation of the main controller 14 is stopped as shown in FIG. 2 and no watchdog pulse stream is generated therefrom. That is, the watchdog pulse is fixed to logic "high" or "low" and transitions to an inactive state. This cause is very likely to be caused by a program bug in the main controller 14. When the watchdog pulse stream is not output from the watchdog pulse terminal of the main controller 14 as described above, the sub controller 26 jumps to the preset phone control mode in response to the basic operation of the phone circuit 12.

When the sub-controller 26 enters the telephone control mode, the DTMF signal is generated corresponding to the selection of the numeric key button on the keyboard 32, the control of the call loop of the trunk line connecting part 24 according to the input of the hook off / on status signal 38, audio DAA 28 Perform control of the. For example, if the hook off / on status signal 38 inputted to the sub controller 26 is activated with a logic “high” and a system stoppage occurs during a call, the control signal output to the trunk line connecting unit 24 and the audio DAA 28 is maintained. To maintain the current call state. Here, the hook off / on state signal 38 is a signal that is activated / deactivated according to the hang off / hang on of the handset 30 and is changed by lifting and lowering the handset.

If the hook off / on state signal 38 is deactivated to a logic " low " and a system stop occurs in a non-call state, jump to the telephone control mode and input a key selection signal located on the keyboard 32; or The telephone line connection part 24 and the audio DAA 28 are controlled according to the transition state of the hook-off / on-state signal to perform general telephone function. For example, if the user hooks off the handset 30, the sub-controller 26 controls the trunk line control unit 24 and the audio DAA 28 to form a trunk line loop of the telephone line and at the same time a dial tone signal input onto the telephone line. Is amplified in audio DAA 28 and output to handset 30 speaker. In this state, when the user dials using the numeric keys placed on the keyboard 32, the sub-controller 26 generates a DTMF signal corresponding to the selected numeric key and transmits the DTMF signal on the telephone line through the trunk line connection 24 to send the other party a call. To call.

Therefore, even if the main controller 14 is not operated due to the system stop, the multi-phone shown in FIG. 1 can be operated by the simple telephone function by the operation of the telephone control mode of the sub-controller 26, thereby solving urgent phone service. do.

As described above, according to the present invention, when the operation of the upper processor is not performed by the system stop in the combined telephone having at least the upper processor and the lower processor to perform the complex function, the lower processor monitors the upper processor and automatically makes a call. By controlling the control mode, the basic telephone function can be performed as it is, thereby maximizing the use of the composite telephone.

Claims (4)

In the call stabilization device when the system is stopped in the composite telephone, A main controller for generating and outputting a watchdog pulse of a predetermined period, and generating control data for performing a main control of the complex telephone; The watchdog pulse is operated as a slave of the main controller to generate a signal corresponding to the control data to control an internal trunk line connection and an audio circuit to form a voice call loop, and to deactivate the watchdog pulse. And a telephone circuit having a sub-controller which is operated in the telephone control mode to control the trunk line connection unit and the audio unit to form a voice call loop. The sub-controller operating in the telephone control mode in response to the deactivation of the watchdog pulse controls the trunk line connection unit by inputting a hook-off signal to form a trunk line call loop, and generates a call from the keyboard. And a DTMF signal corresponding to the number selection signal to be transmitted to the telephone line through the trunk line connection unit. A telephone interface connected to a telephone line to form a call loop under a predetermined control, generating a telephone interface for transmitting various signals to the telephone line, generating a DTMF signal corresponding to an input of control data, and providing the telephone interface to the telephone interface and inputting the telephone interface. A sub-controller for detecting a ring signal to be used, and a main controller for generating and outputting a watchdog pulse of a predetermined period and supplying control data corresponding to the input key selection signal to the sub-controller. In; The sub-controller may include: searching an activation state of a watchdog pulse of the main controller; Providing a control signal corresponding to data to the telephone interface in response to the control from the main controller in response to activation of the watchdog pulse, and transitioning to a preset telephone control mode in response to deactivation of the watchdog pulse. Control method of a composite telephone comprising a. 4. The method of claim 3, wherein the sub-controller operating in the telephone control mode in response to the deactivation of the watchdog pulse controls the telephone interface by inputting a hook-off signal to form a trunk line call loop; And generating a DTMF signal corresponding to the number selection signal generated from the same and transmitting the DTMF signal to the telephone line through the trunk line connection unit.