KR0149703B1 - Circuit for converting voice communication mode in apparatus of receiving/transmitting voice and data, method of controlling the same - Google Patents

Abstract

A method for switching to a voice reception mode of an apparatus for selectively transmitting and receiving voice and data, the method comprising: proceeding to a data reception mode in response to a ring signal of a caller and sending a protocol message over a telephone line; Checking whether a specific tone is received from the caller if the transmission start key is not received from the caller for a predetermined time; Analyzing a predetermined call request key if the specific tone is received; If the specific tone is the call request key, stopping transmission of the protocol message and transmitting a sound informing the user of the call request; Setting the system from the data reception mode to a voice call mode in response to a hook off state of the telephone, and forming a voice call circuit; Transitioning back to the automatic data receiving standby mode in response to a hook on state of the telephone. Thus, the achievement of the voice call is performed even during the initial progress of data communication.

Description

Voice call mode switching circuit of device for transmitting and receiving voice and data and control method thereof

1 is a block diagram of an apparatus for transmitting and receiving voice and data according to the present invention.

2 is a flowchart for performing a control operation for switching to a voice call mode according to the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a voice call mode switching circuit of a voice and data transmitting and receiving device and a control method thereof, and more particularly, to a circuit for switching from a data receiving mode to a voice call mode according to a caller's request and a control method thereof.

In general, a voice and data transmission and reception apparatus such as a facsimile system having a telephone selectively performs transmission or reception of voice or data by designating a preset mode. Such a device is typically set to a mode in which data is automatically received by a user's designation. Thus, in this case, when an external caller dials to perform a voice call with a user of the device, the user's device can freely listen to a specific protocol message such as CNG tone and the like. It does not hear the user's voice. As a result, the caller who recognizes only the other party's facsimile telephone number cannot make a voice call no matter how hard the callee's device is in the automatic receiving mode as described above. Therefore, most users of the device use a facsimile phone only for data transmission and reception, and additionally have a separate voice call dedicated phone.

In general households, one telephone and one facsimile machine are usually installed, and the telephone call mode is normally used. In this case, in order to send the facsimile manuscript to the called party, the caller must first make a voice call in the telephone mode. Indicate that the caller is willing to send the facsimile manuscript. The called party then switches the device to the data receiving mode by operating a mode switching switch such as a dip switch attached to an external panel of the facsimile system. This apparatus for receiving and transmitting voice and data has a problem that both the caller and the called party are troublesome. In addition, the installation of a separate telephone for voice only is a factor that increases the economic burden on the user.

Accordingly, an object of the present invention is to provide a circuit and a control method for switching a voice and data transceiver from a data reception mode to a voice reception mode that can solve the above problems and disadvantages.

Another object of the present invention is to provide a circuit and a control method for switching to a voice receiving mode that can achieve a voice call with an external caller even when the voice and data transmitting / receiving device is designated as a mode capable of automatically receiving data. In providing.

Another object of the present invention is to provide a circuit and a control method for a voice and data transceiver for switching from a data reception mode to a voice call mode in response to a voice call request from a caller.

It is still another object of the present invention to provide a circuit and a control method for forming a voice call path by switching from a data receiving mode to a voice call mode in response to a voice call request signal transmitted from a caller. .

According to the aspect of the present invention for achieving these objects, if a caller hears a specific tone used for transmitting and receiving data from the called party after performing a dialing, the user presses a preset call request key. Then, the called party device switches from the data receiving mode to the voice receiving mode in response to the call request key, and alerts or displays a message informing the called party that a voice call request has occurred. Accordingly, the called party hooks off the telephone to talk to the caller.

In order to achieve these objectives, a method for switching from voice reception mode to voice reception mode in a device for selectively transmitting voice and data is a key for transitioning from a data reception standby mode to a data reception mode and requiring a voice call by a ring signal of a caller. Checking whether is provided from the caller; Transmitting a message informing that the voice call is requested when the key for requesting the voice call is provided; At least in response to a hook off of the device, transitioning to a voice call mode and forming a voice call path.

A first relay connected to a telephone line to output a telephone call current supplied from the telephone line as a voice call path, and to switch the telephone call current to a data call path in response to a first switching control signal; A telephone connected with said telephone line via said first relay; Connected to the telephone line via the first relay for data communication, and performing a voice call in a data automatic reception standby mode of a voice and data transmission / reception system including means for performing interfacing and modulation / demodulation necessary for the data communication. The circuit for performing comprises: detecting means for detecting a ring signal and a hook off state of the telephone in parallel between the telephone and the first relay; A second relay for internally providing a call current to the telephone in response to a second switching control signal applied when the data call path is formed by the switching of the first relay; Means for outputting the first and second switching control signals in response to an external command, proceeding to a data receiving mode in response to a ring signal of a calling party, and sending a protocol message over a telephone line; Means for checking whether a specific tone is received from the caller without receiving a transmission start key, if the specific tone is received, means for analyzing whether a preset call request key is received, and the specific tone is the call request key. Means for discontinuing transmission of the protocol message and for sending a command informing the user that it is a call request, and setting the system from the data reception mode to the voice call mode in response to the hook-off state of the telephone. Means for forming a call, and in response to the hook-on state of the phone, the automatic data reception standby mode. Control means having means for transitioning back to draw; And means for transmitting a message informing that it is a voice call request to the outside in response to the dispensing command of the control means.

According to the configuration of the present invention described above, when an external caller wants to make a voice call with the called party, the external caller presses a key corresponding to the voice call request, so that even if the callee's system is in the automatic data receiving mode, the caller can make a voice call with the called party. Can be done.

Hereinafter, the structure of the method and the overall system according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the following description, detailed descriptions of the type of such structures and the like are provided to aid a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced without such specific details. Moreover, features and functions of well-known circuits are not described in detail in order not to obscure the present invention.

1 is a block diagram showing a connection relationship between a voice and data transmitting and receiving device such as a facsimile system according to the present invention. Referring to FIG. 1, phone 2 is connected to facsimile device 100 via switch 4. For convenience of explanation, the telephone 2 will be frequently referred to as a caller telephone. The telephone 40 is the called telephone connected with the apparatus 100. The telephone 40 will also be referred to as a user telephone. The device 100 includes an interface unit 8 including first and second relays 6 and 22, a transformer TR and first and second amplifiers A1 and A2, a modem 10 connected to the interface unit 8, a ring detector 18, a hook off detector 20, And a buffer unit 16, a control unit 12, a keypad 14, a memory unit 24 having a room and RAM memory, a scanner and printing unit 30, a driving unit 26 for driving the speaker 28, and a speaker 28. Here, the first relay 6 is connected to telephone lines T and R to output a telephone call current supplied from the telephone line as a voice call path, and switch the telephone call current to a data call path in response to a first switching control signal. In charge of function. The first switching control signal C1 is provided by the controller 12 and is typically a signal having a logic high or low shape. When the user sets the device 100 in the automatic reception standby mode for data communication through the keypad 14, the control unit 12 provides the first switching control signal C1 to the first relay 6 to transmit the telephone line T, Let R be connected to terminals L2 and L4 respectively. Thereafter, the control unit 12 checks the ring detection of the ring detector 18 through the buffer unit 16, changes the logic of the first switching control signal C1, and applies it to the first relay 6. Therefore, after the ring detection operation, the telephone lines T and R are connected to the terminals L1 and L3, respectively. Therefore, in this case, the call current is not supplied to the user telephone 40. Then, the control unit 12 cannot detect the presence or absence of the hook-off state of the phone 40 through the hook-off detector 20. In order to solve this problem, the second relay 22 is provided. That is, the second relay 22 enables the controller 12 to determine the hook-off state of the telephone 40 by providing a call current to the telephone 40 in the above-described specific state. The interface unit 8 and the modem 10 are connected to the telephone line through the first relay 6 for data communication, and each interface and modulation and demodulation necessary for the data communication are performed. Keypad 14 and scanner and printing unit 30 are included in the device 100, the function of each of which is well known in the art.

The controller 12 outputs the first and second switching control signals C1 and C2 at a certain point in time in response to a user's mode command set through the keypad 14, and proceeds to a data receiving mode in response to a ring signal of a caller. Means for sending a message via a telephone line, means for checking whether a specific tone is received from the caller if the transmission start key is not received from the caller for a predetermined time, and a preset voice if the specific tone is received. Means for analyzing a call request key, a means for stopping the transmission of the protocol message if the specific tone is the voice call request key, for sending a command informing the user that it is a call request, and responding to a hook-off state of the telephone; Set the system from the data receiving mode to the voice call mode, It has the property means, and means for in response to the on-hook state of the telephone again transition to the data reception standby mode that automatically. Although each means in the control unit 12 can be implemented in hardware, it is preferable to implement in software by a program written as a programming language such as C language, which is generally used. In the present embodiment, the above means are implemented by the flowchart of FIG. Each step of FIG. 2 is embodied as a programming language and then stored in a ROM memory in memory section 24 of FIG. 1 to achieve the object of the present invention. Then, the controller 12 may connect the voice call even if the user has set the device 100 to the automatic reception standby mode.

Hereinafter, an operation according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. Referring to FIG. 2, in operation 200, the device 100 is in a standby state in an automatic receiving standby mode. At this time, the control unit 12 outputs the first switching control signal C1 to allow the first relay 6 to connect the telephone lines T and R to terminals L2 and L4. Then, the second switching control signal C2 is output so that the terminals L22 and L44 are connected to the telephone line. In this state, the controller 12 checks whether the ring detector 18 detects the ring signal through the buffer unit 16 in step 202. If it is determined that a ring signal has been received, the controller 12 alternately outputs the logic of the first switching signal. Thus, the first relay 6 connects the telephone line to terminals L1 and L3. This establishes a data call path through the modem 10. In this state, the controller 12 performs step 204. In step 204, the mobile station proceeds to the data receiving mode in response to the ring signal of the calling party and sends a protocol message through the telephone line. The protocol message is typically a CNG signal specified at an international telegraph consultation meeting. In step 206, the controller 12 analyzes whether a transmission start key is received through the modem 10. Of course, in the case of the present embodiment, since the caller tries to make a voice call in this mode, it will not digitize a key known as a start key or a transmission start key. However, step 206 is provided for the caller wishing to send a facsimile manuscript, and step 210 is for achieving the operation in this case. In step 210, a normal facsimile operation is performed, and detailed execution control thereof is the same as that of a conventional sequence. In step 206, if the transmission start key is not received from the caller for a predetermined time, the controller 12 checks in step 208 whether a specific tone is received from the caller. In step 208, if the specific tone is received, it is analyzed in step 212 whether a predetermined voice call request key is applied. Here, the particular tone consists of dual tone multi-frequency signals, the caller being generated by a combination of function keys located on the keypad of the FM telephone. That is, the caller knows the specific key from the manual or user manual of the facsimile system. Alternatively, a step of transmitting a voice guidance message between the step 206 and the step 208 is provided. For example, if a voice call is desired when the transmission start key is not pressed, for example, pressing #, * 9 causes a voice call. You might be able to send a message that you can run. In this case, a speech synthesizing element containing such a message may be provided and connected to the controller 12. The particular tone that the caller presses further after digitizing the called party's telephone number is provided to the modem 10 via the interface unit 8. The modem 10 has a tone detector therein, which is also known as a dual tone multi frequency signal (DTMF) detector, which transmits data analyzing the tones digitized by the caller to the controller 12. Is provided. Therefore, the control unit 12 stores the tone data received in step 212 in the RAM memory of the memory unit 24 and reads the call request data for the preset voice stored in a specific area of the ROM memory to store the tone data and the received tone data. By comparing, it is possible to determine whether or not there is a match between the two data. In step 212, if matched, that is, if the specific tone is the voice call request key, step 214 of stopping transmission of the protocol message is performed. In operation 216, the speaker 28 sends a command to the user to transmit a sound indicating that the voice call is requested, so that the speaker 28 sends a specific sound. Thus, the user, that is, the called person can be aware of the current situation. In addition, unlike the speaker 28 that transmits sound, the speaker 28 may display a letter or number on the display device to inform the request of the voice call. Here, the state of the device 100 and the telephone 40 does not provide a ring signal to the facsimile because the switch 4 recognizes the busy state. However, the device 100 may transmit the ring signal generated by the modem 10 to the speaker 28 as sound according to the voice call request. Therefore, the tone or message transmitted internally by the speaker 28 or other alarm means may be referred to as an again ring or a rering. In operation 216, the control unit 12 outputs the call switching current to the telephone 40 by outputting the second switching control signal C2 in a logic opposite to a previously output state in a state in which the first relay 6 forms a data path. To be supplied. Thus, since the telephone 40 is provided with the same talk current as that provided by the switch 4, the hook-off detector 20 can properly function. In step 218, the controller 12 checks whether the phone 40 is hooked off. At this time, if the hook is off, the first and second switching control signals are output again in a logic state opposite to the previous logic. The internal call current is thereby blocked, and the voice call path is formed by the first relay 6. Accordingly, the device 100 is temporarily set from the data reception mode to the voice call mode, and a voice call path of step 220 is formed. By the execution of step 220, the caller can realize a truly desired voice call with the called party. Thus, a caller with the telephone 2, which has conventionally only listened to a protocol message and had to hook on the handset, can achieve the voice call, and the callee can receive the caller's call, which may be important, without missing. As a result, the called user can perform voice call and data communication smoothly even with one telephone in the automatic data receiving mode. Step 222 is an auxiliary step of checking the hook-on state of the phone 40 and transitioning back to the automatic data reception standby mode at the time of the hook-on. Step 222 provides a more convenient advantage to the user without any further explanation.

As described above, the present invention has an effect of achieving a voice call with an external caller even when the voice and data transmission / reception apparatuses are designated as a mode capable of automatically receiving data, and the convenience and rate of achievement of the call to the user. To increase.

Although the present invention has been illustrated and described in the accompanying drawings as described above, the same is not limited thereto, and various changes and modifications having ordinary knowledge in the art are possible without departing from the lofty basic concept of the present invention. Could be.

For example, the detailed operation of the control means may be changed somewhat differently from those described in the above description as necessary without departing from the technical spirit of the present invention. In addition, changes may be made as long as the matter allows the operating conditions of the first and second relays, and hardware or firmware may be used instead of the software program.

Claims (15)

A method for switching to a voice call mode in an apparatus for selectively transmitting and receiving voice and data; A first step of transitioning from a data reception standby mode to a data reception mode by a ring signal of a calling party; If a specific tone is received from the caller, checking whether it matches a code for requesting a voice call; Transmitting a message indicating that the voice call is requested if the received specific tone matches the code for requesting a voice call; And transmitting a message indicating that the voice call is requested, and then transitioning from the data receiving mode to the voice call mode and forming a voice call path in response to a hook-off of the device. The method of claim 1, further comprising the step of transitioning back from the voice call mode to the data receiving standby mode in response to a hook on of the device. The method of claim 1, wherein the second step is performed if a transmission start key for informing data transmission from the caller is not provided within a predetermined time. The method of claim 1, wherein a message informing that the voice call request is provided as sound through a speaker. 2. The method of claim 1, wherein a message informing that the voice call request is provided as text through a display element. A control method for switching from a data automatic reception standby mode to a voice call mode of a facsimile system having a telephone; In response to a ring signal at the caller, proceeding to a data receiving mode and sending a protocol message over a telephone line; If a signal corresponding to a transmission start key is not received from the caller for a predetermined time, checking whether a specific tone is received from the caller; Analyzing whether a signal corresponding to a preset call request key is received when the specific tone is received; If the received specific tone is a signal corresponding to a preset call request key, stopping transmission of the protocol message and transmitting a sound indicating that the call is requested; Setting the system from the data reception mode to a voice call mode in response to a hook off state of the phone, and forming a voice call path; Transitioning back to the data auto-receive standby mode in response to a hook on state of the telephone. 7. The method of claim 6, wherein the particular tone consists of dual tone multi-frequency signals. 7. The method of claim 6, wherein the particular tone is generated by a combination of function keys located on the keypad of an FM telephone. A first relay connected to a telephone line and outputting a telephone call current supplied from the telephone line as a voice call path, and switching the telephone call current to a data call path in response to a first switching control signal; A telephone connected with said telephone line via said first relay; A voice call mode switching circuit of a voice and data transmitting / receiving apparatus, connected to said telephone line via said first relay for data communication, and having means for performing interfacing and demodulation and demodulation necessary for said data communication; Detection means connected in parallel between said telephone set and said first relay for detecting a ring signal and a hook-off state of said telephone set; A second relay for internally providing a call current to the telephone in response to a second switching control signal applied when the data call path is formed by the switching of the first relay; Outputs the first and second switching control signals in response to an external command, and checks whether a key for requesting a voice call is provided from the calling party after the transition from the data reception standby mode to the data reception mode by the reception of the ring signal. Control means for generating a transmission signal for transmitting a message informing that the voice call is requested when a key for requesting the voice call is provided, and transitioning to a voice call mode in response to a hook-off of the telephone and forming a voice call path; and; And means for transmitting a message informing that it is a voice call request to the outside in response to the transmission signal of the control means. A first relay connected to a telephone line and outputting a telephone call current supplied from the telephone line as a voice call path, and switching the telephone call current to a data call path in response to a first switching control signal; A telephone connected with said telephone line via said first relay; For making a voice call in a data receiving standby mode of a facsimile system, which is connected to the telephone line via the first relay for data communication and includes means for interfacing and demodulation and demodulation necessary for the data communication. In a circuit; Detection means connected in parallel between said telephone set and said first relay for detecting a ring signal and a hook-off state of said telephone set; A second relay for internally providing a call current to the telephone in response to a second switching control signal applied when the data call path is formed by the switching of the first relay; Means for outputting the first and second switching control signals in response to an external command, proceeding to a data receiving mode in response to a ring signal of a calling party, and sending a protocol message over a telephone line; Means for checking if a specific tone is received from the caller if a transmission start key is not received, and means for analyzing whether a signal corresponding to a preset call request key is received if the specific tone is received; A means for stopping transmission of the protocol message if it is a signal corresponding to a call request key and for sending a command for notifying the user of the call request; and in response to a hook-off state of the telephone, the system receives the voice call mode from the data reception mode. Means for setting a voice communication path; Control means having means for transitioning back to the automatic data reception standby mode in response to a hook-on state of the telephone; And means for transmitting a message informing that it is a voice call request to the outside in response to the sending command of the control means. 11. The circuit of claim 10 wherein the means for checking whether the particular tone is received is a dual tone frequency signal detector. 11. The circuit according to claim 10, further comprising a keypad of an MFC telephone to generate the specific tone by a combination of numeric keys and function keys at the call side. 11. The circuit of claim 10, further comprising means for providing a message informing that the voice call request is a voice announcement message. 11. The circuit according to claim 10, further comprising a speaker or alarm means for transmitting a message informing that the voice call request is made. 11. The circuit according to claim 10, further comprising display means for outputting a message informing that the voice call request is a text.