JP5619792B2 - Data communication apparatus and data communication method - Google Patents

Description

  The present invention relates to a data communication apparatus and a data communication method.

  In recent years, as a notification system in an emergency, a communication terminal for notification has been installed in each subscriber's home, the communication terminal reports to the center when an abnormal situation is detected, etc., and the data communication device on the center side collects data A reporting system is known (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 05-300265

  In the notification system using the above communication terminal, the operator on the center side may have a direct conversation, and depending on the contents, there are an increasing number of cases where the response is transferred to another department in the center or another center.

  As a specific example, in a conventional data communication apparatus, generally, first, a data report is first received from a communication terminal to identify a report content. Next, in the data communication device, when the content of the report is transmitted by a caller (user) instead of a sensor, a telephone line is connected to the connection telephone connected to the data communication device, and the caller and the operator are conversed. Make it possible. Subsequently, when the caller and the operator end the conversation, the operator places the connected telephone handset down (on-hook). At this time, in the data communication device, when detecting the on-hook, the receiver is temporarily taken off (off-hook) by processing inside the circuit, and a conversation end signal (for example, push button ( PB) signal etc.) is transmitted to the exchange side. As a result, the data communication apparatus opens the telephone line.

  Here, during the conversation with the caller, when the operator performs a transfer process to another department in the center or another center according to the content of the conversation, the operator on-hook operation (transfer process operation) on the exchange side Depending on the case, the formation of the subsequent off-hook state by the on-hook detection may be regarded as so-called hooking. In this case, the exchange side cancels the transfer. Then, the connection phone and the communication terminal on the data communication device side should be in a call state, but the data communication device has already transmitted a conversation end signal due to the operator's on-hook operation. There is a problem that the telephone is turned in the disconnection direction and communication with the communication terminal is also disconnected.

  However, as a countermeasure when the above-described problem occurs, for example, the situation is that an operator contacts the caller via a communication terminal after disconnecting communication. In Patent Document 1, the above-described problems are not particularly taken into consideration.

  SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide means for preventing the occurrence of a transfer process failure on a telephone line in an emergency notification system.

  A data communication apparatus according to a first invention includes an incoming call detection unit, a data reception unit, a data analysis unit, a connection control unit, a line monitoring unit, a hook state detection unit, a determination unit, a switching control unit, And a notification unit. The incoming call detection unit detects whether there is an incoming call from an external communication terminal having a conversation function. The data receiving unit receives data from the external communication terminal when the incoming call detecting unit detects an incoming call. The data analysis unit analyzes the data received by the data reception unit, and determines whether or not the user of the external communication terminal needs to have a conversation with the operator. When the data analysis unit determines that there is a need for conversation, the connection control unit connects any one of a plurality of telephone terminals dedicated to the operator and the external communication terminal via the exchange. The line monitoring unit monitors a connection state between the first telephone terminal and the external communication terminal connected by the connection control unit. The hook state detection unit individually detects the on-hook state, the off-hook state, and the hooking state of the first telephone terminal while the line monitoring unit is monitoring the connection state. The determination unit determines whether or not notification of the conversation end signal indicating the end of the conversation is possible according to the detection result of the hook state detection unit. The switching control unit performs transfer processing for switching from the first telephone terminal to another telephone terminal according to the determination result of the determination unit. When the switching control unit performs the transfer process, the notification unit does not notify the conversation end signal.

  According to a second aspect, in the first aspect, when the state of hook king reaches a preset duration, it is properly detected as hook king.

  In a third aspect based on the first aspect, the hook state detection unit properly detects the on-hook state when the on-hook state reaches a preset duration.

  In a fourth aspect based on the first aspect, when the off-hook state reaches a preset duration, the hook state detection unit normally detects the off-hook state.

  A data communication method according to a fifth invention includes an incoming call detection step, a data reception step, a data analysis step, a connection control step, a line monitoring step, a hook state detection step, a determination step, and a switching control step. And a notification step.

  The incoming call detection step detects whether there is an incoming call from an external communication terminal having a conversation function. The data receiving step receives data from the external communication terminal when an incoming call is detected by the incoming call detection step. In the data analysis step, the data received in the data reception step is analyzed to determine whether or not the user of the external communication terminal needs to have a conversation with the operator. The connection control step connects any one of a plurality of telephone terminals dedicated to the operator and the external communication terminal via an exchange when it is determined that the conversation is necessary in the data analysis step. The line monitoring step monitors the connection state between the first telephone terminal and the external communication terminal connected by the connection control step. The hook state detection step individually detects the on-hook state, the off-hook state, and the hooking state of the first telephone terminal during the monitoring of the connection state by the line monitoring step. The determination step determines whether or not notification of the conversation end signal indicating the end of the conversation is possible according to the detection result of the hook state detection step. The switching control step performs transfer processing for switching from the first telephone terminal to another telephone terminal according to the determination result of the determination step. In the notification step, when the transfer process is performed in the switching control step, the conversation end signal is not notified.

  INDUSTRIAL APPLICABILITY The present invention can provide means for preventing the occurrence of transfer processing problems on a telephone line in an emergency notification system.

The figure which shows the structural example of the notification system 100 The figure which shows the internal structural example of the terminal 2a The figure which shows the internal structural example of the data communication apparatus 1 Sequence diagram showing an example of telephone line control when transfer processing is not performed Sequence diagram showing a comparative example of telephone line control when performing transfer processing The sequence diagram which shows an example of the telephone line control in the case of performing the transfer process in this embodiment The flowchart which shows an example of the telephone line control under the monitoring of the line monitoring part 11d The flowchart which shows an example of a process of the hook state detection part 11e The flowchart which shows an example of the detection process of the dial tone by the incoming call detection part 11a.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. First, the structure of the emergency notification system 100 will be described.

<Configuration of reporting system 100>
FIG. 1 is a diagram illustrating an example of the configuration of the notification system 100. The notification system 100 is an external communication terminal (hereinafter referred to as “terminal”) 2a, 2b and 2c connected to the data communication apparatus 1 according to an embodiment of the present invention via the telephone line (communication line) via the exchange 3. Is provided. Note that the number of terminals is not limited to three, but is set as many as the number of subscribers' homes. For convenience of explanation, in FIG. 1, the terminal 2a is installed in the home H1, and the terminal 2b It is assumed that the terminal 2c is installed in the home H3 and the terminal 2c is installed in the home H3.

  In addition, as shown in FIG. 1, the notification system 100 uses a center S1 and another center S2 as an example. In the reporting system 100, the data communication device 1 and the connection telephone T1 are installed in the reception department in the center S1, and the dedicated telephone T2 is installed in the transfer destination (other department).

  In the reporting system 100, a dedicated telephone T3 is installed in another center S2. Here, in this embodiment, for convenience of explanation, a telephone terminal directly connected to the data communication apparatus 1 via a telephone line is referred to as a connection telephone, and other telephone terminals are referred to as dedicated telephones. Note that the number of telephone terminals is not limited to three, and may be any number according to the number of operators, for example.

  Hereinafter, each structure of the terminal 2a and the data communication apparatus 1 in the notification system 100 will be specifically described. Note that the terminals 2a, 2b, and 2c are of the same model, and in the following description, the terminal 2a will be described as a representative.

<Configuration of terminal 2a>
FIG. 2 is a diagram illustrating an internal configuration example of the terminal 2a. The terminal 2a is a device for reporting to the center S1 side in an emergency or the like in the reporting system 100.

  As illustrated in FIG. 2, the terminal 2 a includes an emergency button 21, a microphone 22, a speaker 23, a voice input / output unit 24, a sensor 25, and a communication interface unit (hereinafter referred to as “communication I / F unit”) 26. And a control unit 27.

  The emergency button 21 is a button for accepting a user input for notifying the data communication device 1 of the center S1 of an emergency. The microphone 22 performs voice input, and the speaker 23 performs voice output. The voice input / output unit 24 controls voice input / output. Then, when the emergency button 21 is pressed, the voice input / output unit 24 operates a hands-free call function that does not require conversation by taking the handset or the like. As a result, the caller can talk with the operator on the center S1 side in a hands-free state.

  The sensor 25 is, for example, a gas sensor, and transmits a signal indicating an abnormality to the control unit 27 when a predetermined gas concentration exceeds a threshold value. The sensor 25 is not limited to a gas sensor, and may be a fire sensor that detects the occurrence of a fire based on the smoke concentration, for example. Alternatively, the sensor 25 may be a sensor that is equipped with a security camera or the like and detects the entry of a suspicious person at home. Alternatively, the sensor 25 may use a plurality of types of sensors described above. The sensor 25 in the present embodiment includes a reporting unit that does not require a conversation in the event of an emergency with respect to the data communication apparatus 1.

  The communication I / F unit 26 provides an interface for transmitting to the data communication apparatus 1 voice data of a caller (user), data of contents for notifying abnormality from the sensor 25, and the like.

  The control unit 27 is a processor that performs overall control of the terminal 2a. When the emergency button 21 is pressed, the control unit 27 transmits to the data communication apparatus 1 data indicating that an emergency requiring a conversation with the caller via the communication I / F unit 26. In addition, when receiving a signal indicating abnormality from the sensor 25, the control unit 27 transmits data indicating that an emergency that does not require a conversation with the caller to the data communication device 1 via the communication I / F unit 26. .

<Configuration of Data Communication Device 1>
The data communication apparatus 1 has a function for preventing the occurrence of transfer processing problems on a telephone line. The data communication apparatus 1 is characterized in that it automatically recognizes the state of the transfer operation from the connected telephone. Hereinafter, the internal configuration will be specifically described.

  FIG. 3 is a diagram illustrating an internal configuration example of the data communication apparatus 1. As shown in FIG. 3, the data communication device 1 includes a CPU (Central Processing Unit) 11, a data receiving unit 12, a RAM (Random Access Memory) 13, a flash memory 14, and a switch 15.

  The data receiving unit 12 receives data from the terminal 2a when an incoming call detection unit 11a of the CPU 11 described later detects an incoming call.

  The RAM 13 is a volatile memory and is used for arithmetic processing of the CPU 11 and the like. The flash memory 14 is a non-volatile memory that stores a program for controlling the data communication apparatus 1 in advance. The switch 15 is a switch for switching between the connection (first connection) between the terminal 2a and the connection telephone T1, and the connection (second connection) between the terminal 2a and the data communication device 1.

  The CPU 11 is a processor that performs overall control of the data communication apparatus 1. The CPU 11 controls each unit of the data communication apparatus 1 by executing a plurality of programs stored in advance in the flash memory 14. Here, the CPU 11 executes a control program for preventing a malfunction that occurs when performing the transfer process among the plurality of programs, whereby the incoming call detection unit 11a, the data analysis unit 11b, and the connection control unit. 11c, line monitoring unit 11d, hook state detection unit 11e, determination unit 11f, switching control unit 11g, and notification unit 11h.

  The incoming call detection unit 11a detects whether there is an incoming call from the terminal 2a. Specifically, the presence / absence of an incoming dial tone transmitted from the terminal 2a via the exchange 3 is detected.

  The data analysis unit 11b analyzes the data received by the data reception unit 12 and determines whether or not a conversation between the sender (user) of the terminal 2a and the operator is necessary. Specifically, the data analysis unit 11b includes data indicating that the sensor 25 has notified the emergency (no need for conversation) and data indicating that the emergency has occurred when the emergency button 21 is pressed (conversation is required). Whether or not) is determined.

  When the data analysis unit 11b determines that there is a need for conversation, the connection control unit 11c connects any one of a plurality of telephone terminals dedicated to the operator (for example, the connection phone T1) and the terminal 2a via the exchange 3. Connect. Specifically, when the data analysis unit 11b determines that the conversation is necessary, the connection control unit 11c switches the switch 15 shown in FIG. 3 from the contact B side to the contact A side, thereby connecting the connection telephone T1 and the terminal. 2a is connected via the exchange 3.

  The line monitoring unit 11d monitors the connection state between the connection telephone T1 connected by the connection control unit 11c and the terminal 2a. The hook state detection unit 11e individually detects the on-hook state, off-hook state, and hooking state of the connection telephone T1 while the line monitoring unit 11d is monitoring the connection state. The determination unit 11f determines whether or not notification (transmission) of the conversation end signal indicating the end of the conversation is possible according to the detection result of the hook state detection unit 11e.

  The switching control unit 11g performs a transfer process for switching from the connected telephone T1 to another telephone terminal (for example, the dedicated telephone T2 and the dedicated telephone T3 shown in FIG. 1) according to the determination result of the determination unit 11f. The notification unit 11h does not notify the exchange 3 of the conversation end signal when the switching control unit 11g performs the transfer process. On the other hand, when the switching control unit 11g ends the conversation without performing the transfer process, it notifies the terminal 2a of the conversation end signal.

  Details of the line monitoring unit 11d, the hook state detection unit 11e, the determination unit 11f, the switching control unit 11g, and the notification unit 11h will be described later with reference to flowcharts shown in FIGS.

<Operation of Notification System 100>
Next, an example of operation | movement of the notification system 100 in this embodiment is demonstrated. In the following description, first, an example of the operation of the data communication apparatus 1 when the transfer process is not performed will be described with reference to FIG. Subsequently, as a comparative example, a problem that occurs when the transfer process is performed will be described with reference to FIG. Furthermore, means for preventing problems that occur when performing the transfer process will be described with reference to FIGS.

  FIG. 4 is a sequence diagram showing an example of telephone line control when no transfer process is performed. First, when the control unit 27 of the terminal 2a detects an abnormality by accepting the pressing of the emergency button 21 by the caller, the control unit 27 shifts from an on-hook state to an off-hook state in terms of circuit as a communication event detection. And dialing to call the exchange.

  The exchange 3 receives dialing from the terminal 2a, transmits a calling signal (sound) to the data communication apparatus 1, and causes the terminal 2a to make a calling sound. Then, the communication I / F unit 26 of the terminal 2 a transmits data to the data communication device 1 via the exchange 3.

  On the other hand, the incoming call detection unit 11a of the data communication apparatus 1 detects the incoming call signal, and the data analysis unit 11b analyzes the data received by the data reception unit 12 to determine the origin of the terminal 2a and the center S1. The necessity of a conversation with the operator is determined. Here, when the data analysis unit 11b determines that there is a need for conversation, the connection control unit 11c connects the connection telephone T1 and the terminal 2a via the exchange 3 (TEL switching). Thereby, the caller of the terminal 2a and the operator of the connection telephone T1 can have a conversation. In this case, the caller can talk hands-free.

  Here, the line monitoring unit 11d monitors the connection state between the connection telephone T1 and the terminal 2a. Furthermore, the hook state detection unit 11e individually detects the on-hook state, the off-hook state, and the hooking state of the connection telephone T1 while the line monitoring unit 11d is monitoring the connection state. The hook state detection unit 11e officially detects an on-hook state when the on-hook state continues and the on-hook monitoring time (device definition information) of the telephone terminal has elapsed. Here, as an example, the on-hook monitoring time of the telephone terminal is 1 second.

  Subsequently, when the caller and the operator of the connection telephone T1 end the conversation and the operator enters an on-hook state, the determination unit 11f determines whether or not the conversation end signal (PB signal) can be notified. At this time, if the on-hook state continues for 1 second or longer, the determination unit 11f determines that the conversation end signal can be notified. Thereby, the notification unit 11h notifies the terminal 2a side of the conversation end signal, and the hook state detection unit 11e detects an on-hook to on-hook state transition by internal circuit processing. Then, the incoming call detection unit 11a waits for an incoming call again.

  On the other hand, when receiving the conversation end signal via the communication I / F unit 26, the control unit 27 of the terminal 2a switches from the off-hook state to the on-hook state. By this switching, the control unit 27 cancels the state in which a call can be made.

  Next, as a comparative example, a problem that occurs when performing the transfer process will be described.

  FIG. 5 is a sequence diagram showing a comparative example of telephone line control when performing transfer processing. Until the caller of the terminal 2a and the operator of the connection telephone T1 start a conversation, the same processing as in the sequence diagram shown in FIG. Here, in describing the comparative example, it is assumed that the CPU 11 of the data communication apparatus 1 performs the conventional telephone line control by turning off (stopping) the function of the control program.

  In FIG. 5, when the operator of the connection telephone T1 presses a transfer button (not shown) of the connection telephone T1, for example, to perform the transfer, the CPU 11 of the connection telephone T1 performs a hooking process (see numeral 1 in FIG. 5). ). Here, depending on the operation of the operator, for example, when an on-hook state of less than 1 second is formed, the CPU 11 does not recognize it as on-hook based on the device definition information.

  On the other hand, when the exchange 3 recognizes that the on-hook state between 0.1 second and less than 1 second is detected as hooking as a result, it sends a dial tone to the data communication apparatus 1. As a result, the exchange 3 starts the transfer process (see numeral 2 in FIG. 5).

  When the operator of the connection telephone T1 confirms the dial tone, the operator performs a dialing operation (dialing) from the connection telephone T1 to the transfer destination dedicated telephone (see numeral 3 in FIG. 5). Thereby, the connection telephone T1 sends the dial number to the exchange 3. Then, the exchange 3 sends a calling signal to the data communication apparatus 1 (see numeral 4 in FIG. 5), and a ringing tone sounds on the connection telephone T1. On the other hand, the exchange 3 sends a call signal to a transfer destination dedicated telephone (for example, the dedicated telephone T2), and a ringing tone sounds in the dedicated telephone T2. Further, the exchange 3 is put on hold with respect to the terminal 2a. Thereby, a hold sound flows in the terminal 2a.

  Subsequently, when the transfer destination operator picks up the handset of the dedicated telephone T2 (off-hook operation), a call can be made between the connected telephone T1 and the dedicated telephone T2 (see numeral 5 in FIG. 5).

  Here, when the operator of the connection telephone T1 notifies the transfer destination operator of the transfer and connects the telephone line with the terminal 2a to the transfer destination, the connection telephone T1 shifts to an on-hook state when a handset is placed. To do. Subsequently, when one second elapses after the connection telephone T1 transitions to the on-hook state, the CPU 11 performs on-hook detection because the on-hook state has continued for one second. As a result, the CPU 11 detects the on-hook of the connection telephone T1 during the call between the terminal 2a and the dedicated telephone T2, and therefore disconnects the telephone line during the call of the connection telephone T1 and notifies the end-of-call to notify the conversation end signal. Transition to the state.

  As a result, the connection telephone T1 forms an on-hook state for one second. When such a state occurs, the exchange 3 may recognize the on-hook state for one second as hooking. This is because the data communication apparatus 1 side regards 1 second as apparatus definition information as on-hook, but the on-hook state of less than 1 to 2.2 seconds is a so-called “indeterminate area” on the exchange 3 side. Therefore, the reason for recognizing either the hooking or the disconnection signal is because it depends on the specifications of the exchange.

  Therefore, when the exchange 3 recognizes that the on-hook state for 1 second is hooking, the exchange 3 cancels the transfer and tries to connect the connection telephone T1 and the terminal 2a again, so that a busy tone is transmitted to the transfer destination. (Refer to numeral 6 in FIG. 5).

  On the other hand, in the data communication apparatus 1, since the on-hook is detected continuously from the state where the telephone call is possible between the connection telephone T1 and the dedicated telephone T2 (see numeral 5 in FIG. 5), the terminal 2a ends the conversation. A signal is notified (transmitted), and the disconnection process is executed.

  On the other hand, the terminal 2a detects the disconnection of the telephone line by receiving the conversation end signal and detecting the voice. Therefore, the terminal 2a is unilaterally disconnected.

  Therefore, in the conventional telephone line control in the notification system, there may be a problem that the call is unilaterally disconnected during the transfer process. Therefore, in the present embodiment, means for preventing a problem that occurs when performing transfer processing will be described below.

  FIG. 6 is a sequence diagram showing an example of telephone line control when performing transfer processing in the present embodiment. Note that the CPU 11 of the data communication apparatus 1 executes with the function of the control program turned on. Therefore, in FIG. 6, a line monitoring sequence is also added as compared with FIG. When a power supply (not shown) of the data communication apparatus 1 is input, the CPU 11 starts the process of the flowchart shown in FIG. 7 (hereinafter referred to as “flow process”).

  FIG. 7 is a flowchart showing an example of telephone line control under the monitoring of the line monitoring unit 11d. Note that the processing of the flow shown in FIG. 7 can also be applied when no transfer processing is performed.

  Step S101: The incoming call detection unit 11a of the CPU 11 performs incoming call monitoring processing. Specifically, the incoming call detection unit 11a detects the presence or absence of an incoming signal (such as a dial tone) sent from the exchange 3 via the exchange 3 from the terminal 2a.

  Step S102: If there is an incoming call (step S102: Yes), the CPU 11 proceeds to the process of step S103. On the other hand, when there is no incoming call (step S102: No), the CPU 11 returns to the process of step S101. That is, the incoming call detection unit 11a is again in an incoming call waiting state.

  Step S103: The connection control unit 11c of the CPU 11 performs a connection process between the terminal side (terminal 2a) and the data communication device 1. Specifically, the connection control unit 11c causes the switch 15 and the data receiving unit 12 illustrated in FIG. 3 to be in a connected state. In the present embodiment, the switch 15 is connected to the contact B side as an initial state.

  Step S104: The data receiving unit 12 of the CPU 11 performs a data receiving process. And CPU11 transfers to the process of step S105.

  Step S105: The data analysis unit 11b of the CPU 11 determines whether to use the connection telephone T1. Specifically, the data analysis unit 11b analyzes the data received by the data reception unit 12 and determines whether or not a conversation between the caller of the terminal 2a and the operator of the connection telephone T1 is necessary. If the determination is “no need for conversation” (step S105: No), the CPU 11 proceeds to the process of step S113. In this case, the CPU 11 determines that the data is from the sensor 25, and separately performs a process of displaying information informing the emergency on a display monitor or the like (not shown) used by the operator of the connection telephone T1.

  On the other hand, if it is determined that “there is a need for conversation” (step S105: Yes), the CPU 11 proceeds to the process of step S106.

  Step S106: The connection control unit 11c performs a connection process between the terminal side (terminal 2a) and the connection telephone T1. Specifically, the connection control unit 11c connects the connection telephone T1 and the terminal 2a via the exchange 3 by switching the switch 15 shown in FIG. 3 from the contact B side to the contact A side. And CPU11 transfers to the process of step S107.

  Step S107: The line monitoring unit 11d starts off-hook monitoring. That is, the line monitoring unit 11d monitors the occurrence of an off-hook event via the hook state detection unit 11e because the connection telephone T1 is currently on-hook. Then, as will be described later in the processing of the flow shown in FIG. 8, when the line monitoring unit 11d receives an off-hook detection notification from the hook state detection unit 11e by the off-hook operation of the operator of the connection telephone T1, the CPU 11 The process proceeds to step S108.

  Step S108: The line monitoring unit 11d sets the hook state flag to OFF. Here, the hook state flag is a flag for recognizing whether the connection telephone T1 is currently on-hook (flag = on) or off-hook (flag = off). That is, since the line monitoring unit 11d has received notification of detection of off-hook, the line monitoring unit 11d recognizes that the connection telephone T1 is currently in the off-hook state (flag = off). And CPU11 transfers to the process of step S109. The line monitoring unit 11d records the state of the hook flag in the RAM 13.

  Step S109: The line monitoring unit 11d starts on-hook monitoring. That is, since the connection telephone T1 is currently in an off-hook state, the line monitoring unit 11d monitors the occurrence of an on-hook event via the hook state detection unit 11e. Then, as will be described later in the processing of the flow shown in FIG. 8, when the line monitoring unit 11d receives an on-hook detection notification from the hook state detection unit 11e by the on-hook operation of the operator of the connection telephone T1, the CPU 11 The process proceeds to step S110.

  Step S110: The determination unit 11f of the CPU 11 determines whether or not notification of the conversation end signal is possible. For example, as shown in FIG. 4, when there is no hooking operation and the hook state detection unit 11e detects an on-hook state from an off-hook state for the connected telephone T1, the determination unit 11f determines that notification of the conversation end signal is possible. To do. Also, as shown in FIG. 6, when there is a hooking operation and the exchange 3 sends a dial tone for transfer processing, the hook state detection unit 11e detects an on-hook state from an off-hook state for the connected telephone T1, The determination unit 11f determines not to notify the conversation end signal.

  Therefore, when the notification of the conversation end signal is not performed (step S110: No), the switching control unit 11g of the CPU 11 performs a transfer process. Specifically, the switching control unit 11g switches between the terminal 2a, a dedicated telephone (for example, the dedicated telephone T2), and a call state (see numeral 6 in FIG. 6).

  And CPU11 transfers to the process of step S113. On the other hand, when notifying the conversation end signal (step S110: Yes), the CPU 11 proceeds to the process of step S111.

  Step S111: The connection control unit 11c of the CPU 11 performs a connection process between the terminal side (terminal 2a) and the connection telephone T1. And CPU11 transfers to the process of step S112.

  Step S112: The notification unit 11h of the CPU 11 temporarily shifts from the on-hook state to the off-hook state in circuit, and performs a notification (transmission) process of the conversation end signal to the terminal side (terminal 2a). And CPU11 transfers to the process of step S113.

  Step S113: The CPU 11 performs on-hook processing of the telephone line. Then, the CPU 11 returns to the process of step S101 and restarts the incoming call monitoring process.

  Next, the process of the hook state detection unit 11e of the CPU 11 will be described.

  FIG. 8 is a flowchart illustrating an example of processing of the hook state detection unit 11e. The hook state detection unit 11e is illustrated in FIG. 8 because the connection telephone T1 individually detects the on-hook, off-hook, and hooking states with high accuracy while the line monitoring unit 11d is monitoring the connection state (hook state). Process the flow. Here, in order to monitor the hook state, the line monitoring unit 11d is shown in FIG. 8 at regular intervals (for example, 100 milliseconds [ms]) as necessary when executing the processing of the flow shown in FIG. The flow process of the hook state detection unit 11e is started. In this case, when the line monitoring unit 11d finishes the process of the flow illustrated in FIG. 8, the line monitoring unit 11d repeats the process of the flow from step S201 again.

  Step S201: The hook state detection unit 11e performs hook state acquisition processing. Specifically, the hook state detection unit 11 e refers to a hook state flag recorded in the RAM 13. Then, the CPU 11 proceeds to the process of step S202.

  Step S202: The hook state detection unit 11e determines whether or not the line monitoring unit 11d is currently monitoring off-hook. That is, when the occurrence of an off-hook event is currently being monitored (step S202: Yes), the CPU 11 proceeds to the process of step S203. On the other hand, when the occurrence of an off-hook event is not monitored (step S202: No), the CPU 11 proceeds to a process of step S209 described later.

  Step S203: The hook state detection unit 11e determines whether or not it is currently in the off-hook state during off-hook monitoring. If it is currently in the off-hook state (step S203: Yes), the CPU 11 proceeds to the process of step S204. On the other hand, if it is currently on-hook (step S203: No), the CPU 11 ends the process of the flow shown in FIG.

  Step S204: The hook state detection unit 11e adds 1 to the off-hook counter (hereinafter referred to as “off count”). Here, the off-count means the number of times of continuous acquisition of the off state of the hook state while the hook state detecting unit 11e monitors the off-hook every 100 milliseconds according to the instruction of the line monitoring unit 11d. The hook state detection unit 11e records the number of consecutive acquisitions of the hook state off in the RAM 13. And CPU11 transfers to the process of step S205.

  Step S205: The hook state detection unit 11e determines whether or not the off count value is equal to or greater than a threshold value. Specifically, the hook state detection unit 11e determines whether or not the number of times of continuous acquisition of the hook state is equal to or greater than a threshold value. In this embodiment, the threshold value of the number of consecutive acquisitions of the hook state is set to 2 as an example. When the number of consecutive acquisitions is converted to time, 2 times corresponds to 0.2 seconds. Therefore, when the number of times of continuous acquisition of the hook state is less than the threshold (step S205: No), the CPU 11 ends the process of the flow shown in FIG. On the other hand, when the number of consecutive acquisitions of the hook state OFF is equal to or greater than the threshold (step S205: Yes), the CPU 11 proceeds to the process of step S206.

  Step S206: The hook state detection unit 11e notifies the line monitoring unit 11d of off-hook detection. Subsequently, the CPU 11 shifts to the process of step S108 shown in FIG. 7 and shifts to the process of step S207 by parallel processing.

  Step S207: The hook state detection unit 11e resets the off count to zero. Then, the CPU 11 proceeds to the process of step S208.

  Step S208: The hook state detection unit 11e ends off-hook monitoring. Then, the CPU 11 ends the processing of the flow shown in FIG.

  As described above, the hook state detection unit 11e performs steps S201 to S208, and performs off-hook detection when the number of continuous acquisitions of the hook state reaches the threshold value. In other words, when the off-hook state reaches a preset duration, the hook state detection unit 11e normally detects the off-hook state, so that the detection accuracy is improved.

  Next, the processing of the subsequent flow when the off-hook monitoring is not being performed (step S202: No) will be described.

  Step S209: The hook state detection unit 11e determines whether or not on-hook monitoring is being performed. That is, when the occurrence of an on-hook event is currently being monitored (step S209: Yes), the CPU 11 proceeds to the process of step S210.

  On the other hand, when the occurrence of an on-hook event is not monitored (step S209: No), the CPU 11 ends the processing of the flow illustrated in FIG. 8 as a system failure in which either on-hook or off-hook cannot be monitored. In this case, the CPU 11 separately performs a process of displaying information notifying the system failure on a display monitor or the like (not shown) used by the operator without repeating the process of the flow shown in FIG.

  Step S210: The hook state detection unit 11e determines whether or not it is currently on-hook during on-hook monitoring. If it is currently on-hook (step S210: Yes), the CPU 11 proceeds to the process of step S211. On the other hand, when the operator of the connection telephone T1 performs a hooking operation or the like under on-hook monitoring, and once shifts to the on-hook state after shifting to the off-hook state (step S210: No), the CPU 11 proceeds to step S216 described later. Transition to processing. Although not shown in the processing of the flow of FIG. 8, if the off-hook state continues without performing the transfer process (hooking operation) under on-hook monitoring, the CPU 11 is in a call, so the CPU 11 In order to repeat the processing of the flow shown in FIG. 8 again, the processing of the flow shown in FIG. 8 is once ended.

  Step S211: The hook state detection unit 11e adds 1 to the on-hook counter (hereinafter referred to as “onCount”). Here, the on-count means the number of continuous acquisitions of the on-hook state while the hook state detection unit 11e monitors the on-hook every 100 milliseconds according to the instruction of the line monitoring unit 11d. The hook state detection unit 11e records the number of continuous acquisitions of the on-hook state in the RAM 13. And CPU11 transfers to the process of step S212.

  Step S212: The hook state detection unit 11e determines whether or not the on-count value is equal to or greater than a threshold value. Specifically, the hook state detection unit 11e determines whether or not the number of times of continuous acquisition of the hook state is equal to or greater than a threshold value. In the present embodiment, the threshold value obtained by converting the number of consecutive acquisitions into time is 2.2 seconds. The reason for setting the threshold to 2.2 seconds is to avoid an indeterminate area on the exchange 3 side. On the exchange 3 side, on-hook detection (phone line Disconnect).

  Accordingly, since the hook state detection unit 11e monitors on-hook every 100 milliseconds, the threshold value of the on-count value is 22 (the number of consecutive acquisitions) in order to reach 2.2 seconds. If the number of times of continuous acquisition of the hook state is less than the threshold value (step S212: No), it cannot be regarded as on-hook detection, so the CPU 11 repeats the processing of the flow shown in FIG. End the process. On the other hand, if the number of times of continuous acquisition of the hook state is greater than or equal to the threshold (step S213: Yes), it can be regarded as on-hook detection, so the CPU 11 proceeds to the process of step S213.

  Step S213: The hook state detection unit 11e notifies the line monitoring unit 11d of on-hook detection. Subsequently, the CPU 11 shifts to the process of step S110 in FIG. 7 and shifts to the process of step S214 by parallel processing.

  Step S214: The hook state detection unit 11e resets the on count to zero. Further, the hook state detection unit 11e sets the hook state flag to ON. Then, the CPU 11 proceeds to the process of step S215.

  Step S215: The hook state detection unit 11e ends the on-hook monitoring. Then, the CPU 11 ends the processing of the flow shown in FIG.

  As described above, the hook state detection unit 11e performs the processing of steps S209 to S215, and performs on-hook detection when the number of continuous acquisitions of the hook state reaches the threshold value. In other words, when the on-hook state reaches a preset continuation period, the hook state detection unit 11e normally detects the on-hook state, so that the detection accuracy is improved.

  Next, the subsequent flow processing when on-hook monitoring is in progress and the current on-hook state is not established (step S210: No) will be described. In the process of step S210, as a specific example in which No is determined, for example, before reaching the on-hook threshold (2.2 seconds), an off-hook operation (hooking) by the operator of the connection telephone T1 is entered. Means that.

  Step S216: The hook state detection unit 11e determines whether or not the number of consecutive acquisitions of the hooking state is greater than or equal to a threshold value. When the number of continuous acquisitions in the hooking state is less than the threshold (step S216: No), the CPU 11 proceeds to the process of step S220. In the present embodiment, the threshold value for the number of consecutive acquisitions of the hooking state is set to 3 as an example. When the number of consecutive acquisitions is converted to time, 3 times corresponds to 0.3 seconds.

  On the other hand, when the number of consecutive acquisitions of the hooking state is equal to or greater than the threshold (step S216: Yes), the CPU 11 proceeds to the process of step S217.

  That is, if the timing when an off-hook operation is performed by the operator before reaching the on-hook threshold (2.2 seconds) is less than 0.3 seconds, the hook state detection unit 11e hooks as a so-called instantaneous interruption. Means to ignore the operation.

  On the other hand, when the off-hook operation by the operator of the connection telephone T1 is 0.3 seconds or more and the continuous acquisition count reaches 3 times or more, the on-hook threshold is less than 2.2 seconds. If it is within, the hook state detection unit 11e recognizes that it is in a hooking state. In other words, when the hook king state reaches the preset duration, the hook state detection unit 11e properly detects the hook king. Therefore, in the present embodiment, during the on-hook monitoring, it is possible to improve the accuracy of detection of hooking by clearly dividing whether or not it is in a hooking state by time.

  Step S217: The hook state detection unit 11e refers to the RAM 13 and determines whether or not the transfer flag is on. When the transfer flag is not on (step S217: No), the CPU 11 proceeds to the process of step S218. On the other hand, when the transfer flag is on (step S217: Yes), the CPU 11 proceeds to the process of step S219.

  Here, the transfer flag is turned on when the number of continuous acquisitions of hooking detection is greater than or equal to the threshold value and a dial tone is detected. In the flow process shown in FIG. Is set from off (default setting) to on.

  If the transfer flag is set to on, the next time the process proceeds to step S217, since the transfer flag is set to on, the process proceeds to step S219. This means that the dial tone is not sent again and means that the conversation with the transfer destination is in progress (see numeral 5 in FIG. 6). In this case, the exchange 3 recognizes that the call state between the connection telephone T1 and the terminal 2a has ended (see numeral 6 in FIG. 6).

  Step S218: The hook state detection unit 11e performs a dial tone (DT) detection process. Specifically, the hook state detection unit 11e causes the incoming call detection unit 11a to execute the process of the flow shown in FIG. When the incoming call detection unit 11a finishes the process of the flow shown in FIG. 9, the CPU 11 proceeds to the process of step S220.

  Step S219: The hook state detection unit 11e sets the transfer flag to off. And CPU11 transfers to the process of step S220.

  Step S220: The hook state detection unit 11e resets the on-count to zero. Then, the CPU 11 ends the processing of the flow shown in FIG.

  Next, a dial tone (DT) detection process by the incoming call detection unit 11a will be described.

  FIG. 9 is a flowchart illustrating an example of a dial tone detection process performed by the incoming call detection unit 11a. In response to an instruction from the hook state detection unit 11e in step S218 shown in FIG. 8, the incoming call detection unit 11a starts the processing of the flow shown in FIG.

  Step S301: The incoming call detection unit 11a performs an audible sound acquisition process. Specifically, the incoming call detection unit 11a performs a process for acquiring (receiving) a dial tone from audible sounds.

  Step S302: The incoming call detection unit 11a determines whether or not the dial tone is currently being monitored. Specifically, when the incoming call detection unit 11a is monitoring the transmission of a dial tone from the exchange 3 (step S302: Yes), the CPU 11 proceeds to the process of step S303. On the other hand, when the dial tone is not being monitored (step S302: No), the CPU 11 ends the processing of the flow shown in FIG.

  Step S303: The incoming call detection unit 11a determines whether or not it is in an on state meaning that a dial tone is being received. When it is not in the on state (step S303: No), the CPU 11 proceeds to the process of step S309 described later. On the other hand, if it is currently on (step S303: Yes), the CPU 11 proceeds to the process of step S304.

  Step S304: The incoming call detection unit 11a adds 1 to the dial tone counter (hereinafter referred to as “DT-onCount”). Here, DT-onCount means the number of times of continuous acquisition of an audible sound (radiation tone) state during monitoring of the dial tone. The incoming call detection unit 11a records the number of continuous acquisitions of the audible sound state in the RAM 13. And CPU11 transfers to the process of step S305.

  In the present embodiment, the threshold of the number of continuous acquisitions of the audible sound (radiation sound) state is set to 20 as an example. That is, when the number of consecutive acquisitions is converted to time, 20 times corresponds to 2 seconds.

  Step S305: The incoming call detection unit 11a determines whether or not the number of continuous acquisitions of the audible sound state is greater than or equal to a threshold value. If it is equal to or greater than the threshold (step S305: Yes), the CPU 11 proceeds to the process of step S306. On the other hand, when it is less than the threshold (step S305: No), the CPU 11 ends the process of the flow shown in FIG.

  Step S306: The incoming call detection unit 11a sets the transfer flag to ON. Then, the CPU 11 proceeds to the process of step S307.

  Step S307: The incoming call detection unit 11a resets DT-onCount to zero. Then, the CPU 11 proceeds to the process of step S308.

  Step S308: The incoming call detection unit 11a ends the monitoring of the dial tone. Then, the CPU 11 ends the process of the flow shown in FIG. Subsequently, the CPU 11 proceeds to step S220 shown in FIG.

  Step S309: The incoming call detection unit 11a resets DT-onCount to zero. Then, the CPU 11 ends the process of the flow shown in FIG. Subsequently, the CPU 11 proceeds to step S220 shown in FIG.

  As described above, the data communication device 1 in the notification system 100 can manage in detail the on-hook and off-hook states of the connection telephone T1 connected to the data communication device 1 during a transfer operation using a telephone line. Furthermore, the data communication apparatus 1 can accurately recognize the hooking operation that triggers the start or stop of the transfer operation, and can determine whether the transfer operation is being performed in combination with the detection state of the dial tone. Based on the result, the data communication apparatus 1 can determine the end operation on the data communication apparatus 1 side. Further, when the currently connected telephone terminal and the terminal 2a end the call without performing the transfer process, the data communication apparatus 1 notifies the terminal 2a side of a conversation end signal. On the other hand, when performing the transfer process, the data communication apparatus 1 does not notify the terminal 2a side of the conversation end signal by the determination process using transmission of the dial tone.

  Therefore, the data communication apparatus 1 can prevent the occurrence of transfer processing problems.

<Supplementary explanation of the embodiment>
In the above-described embodiment, the flash memory 14 may be used as a computer-readable recording medium in which instructions for causing a computer to execute a control program are recorded. Here, the control program includes an incoming call detection step, a data reception step, a data analysis step, a connection control step, a line monitoring step, a hook state detection step, a determination step, a switching control step, and a notification step. Is executed by a computer.

DESCRIPTION OF SYMBOLS 1 ... Data communication apparatus, 11a ... Arrival detection part, 11b ... Data analysis part, 11c ... Connection control part, 11d ... Line monitoring part, 11e ... Hook state detection part, 11f ... Determining unit, 11g ... Switch control unit, 11h ... Notifying unit, 2a, 2b, 2c ... Terminal, 100 ... Notification system

Claims (5)

A data communication apparatus for connecting an external communication terminal having a conversation function and a plurality of telephone terminals via an exchange,
A call detector for detecting the presence or absence of an incoming call from the communication terminal,
If the incoming call detecting section detects the incoming, and the data receiver for receiving data from the previous SL communication terminal,
A switch unit that switches between the data receiving unit and a telephone terminal connected to the data communication device;
A data analysis unit for analyzing the data to which the data receiving unit receives, determines whether it is necessary to operate the conversation function of the previous SL communication terminal,
If it is determined that there is a need by the data analyzing unit, a connection control unit that controls the switching unit to connect the telephone terminals connected to said data communication apparatus and before Symbol communication terminal via the exchange,
A line monitoring unit for monitoring the connection status of the connected the telephone terminal and the previous SL communication terminal,
A hook state detection unit for detecting any of the on-hook, off-hook, and hooking states of the connected telephone terminal while the line monitoring unit is monitoring the connection state;
In accordance with the detection result of the hook state detection unit, a determination unit that determines whether or not notification of a conversation end signal indicating the end of the conversation function is possible,
A switching control unit for performing a transfer process for switching from the connected telephone terminal to another telephone terminal according to the determination result of the determination unit;
When at least the switching control unit switches to a telephone terminal connected to the exchange not connected to the data communication device as the other telephone terminal , a notification unit for notifying the exchange of the conversation end signal;
A data communication apparatus comprising: The data communication apparatus according to claim 1, wherein
The hook state detection unit, when continuously within the time period in which the state of the hook is previously set, data communication and detecting by said hook King device. The data communication apparatus according to claim 1, wherein
The hook state detecting section, if continued over a period in which the state of the hook is previously set, data communication and detecting with said hook device. The data communication apparatus according to claim 1, wherein
The hook state detecting section, if continued over a period in which the off-hook state is set in advance, data communication and detecting by said off-hook device. A data communication method by a data communication device for connecting an external communication terminal having a conversation function and a plurality of telephone terminals via an exchange,
And incoming detection step of detecting the presence or absence of an incoming call from the communication terminal,
If the incoming call is detected by the incoming call detecting step, and a data reception step of receiving by the data receiving unit included in the data communications device data from the previous SL communication terminal,
A data analyzing step of determining the presence or absence of the analyzes received the data is the data receiving step, the need to operate the conversation function of the previous SL communication terminal,
Wherein if it is the data analysis determined that there by Ri need to step, the controls the switch unit for switching a data receiving unit and a telephone terminal connected to the data communications device, a telephone terminal connected to said data communication apparatus a connection control step of connecting a front Symbol communication terminal via the exchange when,
And line monitoring step of monitoring the connection status of the previous SL telephone terminal before Symbol communication terminal which is connected,
During the monitoring of the connection state by the line monitoring step, the hook of the connected the telephone terminal, and off-hook, and the hook state detecting step of detecting one of the state of the hooking,
A determination step of determining whether or not notification of a conversation end signal indicating the end of the conversation function is possible according to a detection result of the hook state detection step;
A switching control step for performing a transfer process for switching from the connected telephone terminal to another telephone terminal according to the determination result of the determination step;
A notification step of notifying the switch of the conversation end signal when switching to a telephone terminal connected to the switch but not connected to the data communication device as the other telephone terminal by at least the switching control step;
A data communication method comprising:

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