JP2006108821A - Communication terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To display originator information exactly in a communication terminal dealing with originator information notification service. <P>SOLUTION: The communication terminal comprises a main control section 1, a circuit control section 2, a call termination detecting section 7, a data demodulating section 8, a ringing tone output section 12, and a display section 14. The call termination detecting section 7 detects a call termination signal (e.g. ringing signal, information receiving terminal actuation signal) received at the circuit control section 2 from a telephone line and sends it to the main control section 1. A data demodulating section 8 demodulates originator information from a modem signal received at the circuit control section 2 and sends it to the main control section 1. The main control section 1 identifies a call termination signal detected at the call termination detecting section 7 after completing reception of the originator information and when the call termination signal is a ringing signal, the ringing signal is outputted from a ringing signal output section 13 and the originator information is displayed at the display section 14. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a communication terminal device such as a telephone device, and more particularly to a communication terminal device corresponding to an additional service such as a caller information notification service on an analog telephone line.

  A caller information notification service is implemented as an additional service provided using an analog telephone line. Caller information notification service means that when a call is made to a contractor of this service, the caller information (information such as the caller's phone number) is called before the call, and the subscriber line exchange passes the telephone line through the subscriber. The caller information notification service-compatible telephone device displays caller information when a call is made.

When the caller information notification service is performed, as shown in FIG. 8, when the subscriber line switch receives a call from the caller, the telephone connected to the call destination communication terminal (hereinafter referred to as the called terminal). The line polarity is reversed to notify the start of the incoming operation (procedure S31), and then the information receiving terminal activation signal (CAR) shown in FIG. 9A is transmitted to the incoming terminal (procedure S32). The receiving terminal detects the information receiving terminal activation signal and closes the line to transmit a primary response signal to the subscriber line switch (step S33). The subscriber line switch detects this primary response signal, converts the caller information into a modem signal of 1200 bps, and transmits it to the receiving terminal (step S34). When the receiving terminal completes the reception of the caller information, it notifies the subscriber line exchange that the caller information has been received (reception completion signal) by opening the line (step S35). When the subscriber line switch detects this reception completion signal, it transmits a call signal shown in FIG. 9B to the receiving terminal (step S36). The receiving terminal performs ringing and displays the caller information received earlier. When the user of the receiving terminal picks up the handset and goes off-hook, the receiving terminal closes the telephone line and transmits a secondary response signal to the subscriber line switch (step S37). When the subscriber line switch detects this secondary response signal, it reverses the polarity of the telephone line connected to the receiving terminal to the polarity before inversion (step S38), and calls between the calling party and the receiving terminal. The state is set (step S39) (see Patent Document 1).
JP-A-8-261335 (FIG. 8)

  In the communication terminal corresponding to the conventional caller information notification service, after the receiving terminal completes reception of the caller information and opens the line, the caller abandons the call and immediately after that, the other caller receives the same call. When a connection request is made to the terminal, the subscriber line switch detects that the call is abandoned, reverses the polarity of the telephone line connected to the receiving terminal (returns to the state before reversal), then As described above, after the polarity of the telephone line connected to the receiving terminal is reversed, the information receiving terminal activation signal is transmitted to the receiving terminal.

  However, the conventional caller information notification service compatible communication terminal detects the presence of the leading ON period when the information receiving terminal activation signal shown in FIG. 9A or the call signal shown in FIG. 9B arrives. Only the incoming call detection is performed, the two types of signals are not identified, the incoming signal received first after the polarity inversion (step S31) from the idle state is determined as the information receiving terminal activation signal, and the caller information is received. Since the incoming signal received after the line is released (step S35) is determined as the ringing signal, if the information receiving terminal activation signal arrives after the line is released, the incoming call is erroneously performed. At this time, since a modem signal is heard when the user of the receiving terminal puts his ear on the handset, the user of the receiving terminal notices that the call was not made for the first time when the handset was put on his ear. Further, the caller information displayed on the receiving terminal when the incoming call rings is that of the caller who has already abandoned the call, and the correct caller information cannot be displayed.

  The present invention has been made to solve such a problem, and an object of the present invention is to accurately caller information in a communication terminal device connected to an analog telephone line provided with a caller information notification service. Is to display.

The invention according to claim 1 is a communication that accommodates an external line connected to an exchange that sends an activation signal, a caller information signal, and a call signal to a communication terminal device on the receiving side, and can display caller information. A terminal device, comprising: a determining unit that determines whether a received signal is the call signal; and a unit that displays the caller information only when it is determined that the received signal is the call signal. Is a communication terminal device.
The invention according to claim 2 accommodates an external line connected to an exchange that sends an activation signal, a caller information signal, and a call signal to a communication terminal device on the receiving side, and is capable of displaying caller information. A terminal device, comprising: a determining unit that determines whether a received signal is the activation signal; and a unit that displays the caller information when it is determined that the received signal is not the activation signal. Is a communication terminal device.
The invention according to claim 3 is the communication terminal apparatus according to claim 1 or 2, wherein the determining means determines based on a waveform of a received signal.
The invention according to claim 4 reverses the polarity of the telephone line at the start of outgoing call, sends an activation signal, a caller information signal, and a call signal, and reverses the polarity of the telephone line when the outgoing call is stopped A communication terminal device capable of accommodating an external line connected to the terminal and displaying caller information, wherein polarity inversion detection means for detecting inversion of the polarity of the telephone line, and inversion of the polarity by the polarity inversion detection means A counting means for counting the number of times of reception of a signal received when detected, and a means for displaying the caller information only when the count value of the counting means reaches a predetermined value. It is a communication terminal device.
According to a fifth aspect of the present invention, there is provided an exchange that reverses the polarity of a telephone line at the start of outgoing call, sends an activation signal, a caller information signal, and a call signal, and reverses the polarity of the telephone line when the outgoing call is stopped Polarity reversal detection for detecting that the polarity of the telephone line is in a state before inversion or that the state has returned to the state. And a counting means for counting the number of times of reception of a signal received since the polarity repolarization detecting means detects that the polarity is in a state before inversion or has returned to the state, and the counting means And a means for displaying the caller information only when the count value reaches a predetermined value.
The invention according to claim 6 is the communication terminal apparatus according to claim 4 or 5, wherein the counting means counts only the activation signal and the calling signal among the received signals. is there.

  According to the present invention, since the caller information is displayed only when the received signal after receiving the caller information is a call signal, the correct caller information can be displayed.

Embodiments of the present invention will be described below with reference to the drawings.
[First Embodiment]
As shown in FIG. 1, the telephone apparatus according to the first embodiment of the present invention includes a main control unit 1 composed of a microcomputer (hereinafter referred to as a microcomputer) that controls the entire apparatus, and a telephone line. A line control unit 2 that is connected and performs connection control of a telephone line, and a switching of an audio signal path between the handset 4, the speaker 5, and a microphone (hereinafter referred to as a microphone) 6 that is connected to the line control unit 2. A voice path control unit 3 that performs communication, an incoming call detection unit 7 connected to the line control unit 2, a data demodulation unit 8, and a hook state detection unit 9.

  Here, the voice path control unit 3 is controlled by the main control unit 1. For example, when the handset 4 is picked up, a voice signal path is set between the line control unit 2 and the handset 4, and a key to be described later. When the on-hook key of the input unit 11 is pressed, an audio signal path is set between the line control unit 2 and the speaker 5 and microphone 6. The incoming call detection unit 7 detects an incoming signal (calling signal, information receiving terminal activation signal, etc.) received by the line control unit 2 from the telephone line, and sends it to the main control unit 1. The data demodulator 8 demodulates the modem signal received by the line controller 2 and sends it to the main controller 1. The hook state detection unit 9 detects the hook state of the handset 4 and notifies the main control unit 1 of the detection result.

  The telephone device also includes a DC loop forming unit 10, a key input unit 11, a ringing tone output unit 12, an incoming call display unit 13, a display unit 14, a non-volatile memory 15, and a timer each connected to the main control unit 1. 16 is provided.

  The DC loop forming unit 10 mainly detects that the hook state detection unit 9 detects an off-hook of the handset 4 and that the signal detected by the incoming call detection unit 7 is the information reception terminal activation signal shown in FIG. When the control unit 1 makes a determination, a switch (not shown) provided in the line control unit 2 is closed to form a DC loop in the telephone line with the subscriber line switch, thereby closing the telephone line. . The key input unit 11 includes a numeric keypad, an on-hook key, and the like, and is used to input a user operation command to the main control unit 1. The ringing tone output unit 12 outputs a ringing tone under the control of the main control unit 1 when the main control unit 1 determines that the signal detected by the incoming call detection unit 7 is the paging signal shown in FIG. . The incoming call display unit 13 includes an LED (light emitting diode), and performs incoming call display under the control of the main control unit 1 in the same manner as the ringing tone output. The display unit 14 includes a liquid crystal display device, and displays the operating state of the telephone device, information input from the key input unit 11, and the like on the main control unit 1 based on control. The nonvolatile memory 15 is a storage means for storing data set by the user, such as abbreviated dial numbers. The timer 16 is used for measuring time when the main control unit 1 executes various processes.

  Next, referring to FIGS. 2 to 4, regarding the operation of the telephone device according to the present embodiment, [1] When the incoming signal after receiving the modem signal is a ringing signal (secondary incoming signal) (FIG. 2) [2] When the incoming signal after receiving the modem signal is an information receiving terminal activation signal (primary incoming signal) (FIG. 3), [3] When there is no incoming signal after receiving the modem signal (FIG. 4) Explain in order. The “telephone device” in these figures is a telephone device compatible with the caller information notification service having the configuration of FIG. 1, and the owner assumes a contract for the caller information notification service.

[1] When the incoming signal after receiving the modem signal is a ringing signal (secondary incoming signal) (FIG. 2)
This is a normal operation sequence similar to FIG. First, when a caller makes a call to a telephone device (procedure S1), a subscriber line switch (hereinafter abbreviated as a switch) is connected to the call destination telephone device (hereinafter referred to as a called telephone device). The polarity of the current telephone line is reversed to notify the start of the incoming operation (procedure S2), and then the information receiving terminal activation signal shown in FIG. 9A is transmitted to the incoming telephone device (procedure S3). In the incoming side telephone device, the incoming call detection unit 7 detects the information reception terminal activation signal and sends the waveform to the main control unit 1. Since the main control unit 1 is the first incoming signal counting from when the received incoming signal is in the idle state, the length of the ON period of the waveform of the incoming signal is 0.5 seconds or less or 0.5 The information receiving terminal activation signal is determined without identifying whether it is longer than 1 second or shorter than 1 second, and the DC loop forming unit 10 is instructed to form a DC loop. The DC loop forming unit 10 operates a switch provided in the line control unit 2 to form a DC loop and closes the telephone line, thereby transmitting a primary response signal to the exchange (step S4).

  When the exchange detects this primary response signal, it converts the caller information of the caller into a modem signal and transmits it to the called telephone device (step S5). In the receiving side telephone device, the data demodulating unit 8 demodulates the caller information and sends it to the main control unit 1. The main control unit 1 stores the received caller information in an internal RAM (not shown). Further, the main control unit 1 determines that the reception of the caller information is completed when receiving the caller information from the data demodulation unit 8, and instructs the DC loop forming unit 10 to disconnect the DC loop. The count operation of the timer 16 is started. The DC loop forming unit 10 notifies the exchange that reception of the caller information is completed (reception completion signal) by disconnecting the DC loop and releasing the telephone line (step S6). The timer 16 generates a time-out signal and outputs the time-out signal to the main control unit 1 when the preset constant time is finished, but normally, the incoming call detection unit 7 detects the next incoming signal before the count is finished. Cleared by the main control unit 1 based on the detection.

  When the exchange detects this reception completion signal, it transmits a ringing signal shown in FIG. 9B to the called telephone device (step S7) and transmits an RBT (ringback tone) to the caller. In the incoming side telephone device, the incoming call detection unit 7 detects a call signal and sends the waveform to the main control unit 1. When receiving the call signal from the incoming call detection unit 7, the main control unit 1 stops the count operation of the timer 16 and clears the count value. If it is determined from the length of the ON period of the waveform of the received incoming signal that the signal is a ringing signal, the incoming tone output unit 12 is instructed to output the incoming ring tone, and the incoming display unit 13 displays the incoming call. Instructs the pattern to emit light. Further, the caller information previously stored in the RAM is sent to the display unit 14 for display. Note that the ringing tone pattern and the incoming call display pattern are stored in the nonvolatile memory 16 in advance.

  The user of the receiving side telephone device can confirm the caller by knowing that the call is being received by listening to the ringing tone and viewing the caller information displayed on the display unit 14. When the user of the receiving side telephone device picks up the handset 4, the hook state detection unit 9 detects off-hook and notifies the main control unit 1, so the main control unit 1 notifies the DC loop forming unit 10 of the DC loop. Direct the formation. The DC loop forming unit 10 forms a DC loop and transmits a secondary response signal by closing the telephone line (step S8). When the exchange detects this secondary response signal, it reverses the polarity of the telephone line connected to the called telephone device (step S9), and sets the call state between the caller and the called telephone device (step S9). Procedure S10).

[2] When the incoming call after receiving the modem signal is an information receiving terminal activation signal (primary incoming call) (FIG. 3)
In this sequence, after the receiving side telephone apparatus receives the modem signal of the calling party information of the calling party A, the calling party A abandons the outgoing call, and immediately after that, another calling party B calls the receiving side telephone apparatus. This is the case when a call is made. In this sequence, the process from the time when the caller A places a call (procedure S1) to the time when the receiving side telephone device completes reception of the modem signal and disconnects the DC loop (procedure S6) is the same as FIG.

  As shown in FIG. 3, the timing at which the caller A abandons the call (procedure S11) is immediately after the exchange receives a modem signal reception completion signal (DC loop disconnection) from the terminating telephone device (procedure S6). Suppose. When the caller A abandons the call and the handset goes on-hook, the DC loop between the telephone device of the caller A and the exchange is disconnected, so the exchange determines that the call is abandoned. Then, the polarity of the telephone line with the receiving side telephone device is reversed (step S12).

  Immediately after that, when another caller B calls the same callee telephone device as the callee of caller A (step S13), the exchange changes the polarity of the telephone line to which the callee telephone device is connected. The information receiving terminal activation signal shown in FIG. 9A is transmitted to the called telephone device (procedure S15). In the incoming side telephone device, the incoming call detection unit 7 detects the information reception terminal activation signal and sends the waveform to the main control unit 1. The main control unit 1 determines that the incoming signal is an information receiving terminal activation signal from the length of the ON period of the waveform of the received incoming signal, and instructs the DC loop forming unit 10 to form a DC loop. . The DC loop forming unit 10 forms a DC loop and transmits a primary response signal by closing the telephone line (step S16). The subsequent sequence is the same as that after step S5 in FIG.

  Here, in the case of the conventional apparatus, the first incoming signal counted from the idle state is received as the information receiving terminal activation signal and the modem signal without identifying whether the incoming signal is a call signal or an information receiving terminal activation signal. Then, since the incoming signal received after the telephone line was released was determined to be a call signal, another caller B made the same party as the callee of caller A immediately after caller A abandoned the call. When a call is made, the information reception terminal activation signal is erroneously determined as a call signal, and an incoming ringing and caller information display are performed. In this embodiment, the modem signal is received and the telephone line is opened. Since the information receiving terminal activation signal and the calling signal are identified on the basis of the length of the ON period of those waveforms, the information receiving terminal activation signal is used as the calling signal in the above case. Judgment by mistake, ringing and calling It is not possible to perform the user information display.

[3] When there is no incoming call after receiving a modem signal (Figure 4)
This sequence is for the case where the caller abandons the call after the destination telephone apparatus receives the modem signal and no call is made to the callee even after a certain period of time. In this sequence, after the caller makes a call (procedure S1), the call is abandoned and the polarity of the telephone line with the receiving side telephone device is restored (procedure S12). Is the same.

  As described with reference to FIG. 3, in the receiving side telephone device, the timer 16 starts counting when the reception of the caller information is completed, and when the next incoming signal is detected within a certain time, the timer 16 To clear. Here, since the next incoming signal is not detected within a certain time, the timer 16 generates a time-out signal and outputs it to the main control unit 1. When the main control unit 1 receives the timeout signal, the main control unit 1 discards the caller information previously stored in the RAM. As a result, the state of the telephone device returns to the initial state of the sequence.

  Here, the outside line capture prohibiting process will be described. The user of the receiving telephone performs a telephone line capturing operation after the telephone line is closed in order to receive the caller information in step S4 in FIG. 2 and until the call signal is received in step S7. Then, the following problems (1) to (3) occur.

(1) While receiving a modem signal, a line has already been acquired to receive the modem signal. Therefore, noise enters the line and the signal cannot be received.
(2) If the line is captured between the step S6 and the call signal detection in S7, the line can be captured because the line is open. However, since the line is in use in the exchange to send the calling signal, a problem occurs in the operation of the exchange.
(3) Since there is a call abandonment in step S11 of FIG. 3, there is a possibility that the line cannot be captured if the line capture is permitted after the call signal is detected. Also, in order to simplify the processing, if permission is granted after the elapse of a predetermined time after S4, S5 or S6, the call is abandoned in step S11, and if there is an incoming call from another caller immediately, May be receiving a modem signal, which causes the problem as described in (1) above.

Accordingly, the line capture prohibition period is set to any of the following (a), (b), and (c).
(A) From information receiving terminal activation signal detection (S3) to call signal detection (S7) (b) From information receiving terminal activation signal detection (S3) to call signal detection (S7), or S4 or S5 or Whichever comes first after the elapse of a predetermined time from S6, (c) The earlier from the detection of the information receiving terminal activation signal (S3) to the detection of the call signal (S7) or the repolarization detection. The same applies to the second to fourth embodiments.

[Second Embodiment]
The block diagram of the telephone device according to the second embodiment of the present invention is the same as that of the first embodiment. However, in the first embodiment, only the next incoming signal that has received the modem signal is identified as a call signal or an information reception terminal activation signal based on the length of the ON period of the waveform. In the present embodiment, for all incoming signals, whether the signal is a call signal or an information reception terminal activation signal is identified based on the length of the ON period of the waveform. Hereinafter, differences from the first embodiment will be described.

  When the operation sequence shown in FIG. 2 or FIG. 4 is performed, when the receiving side telephone device receives the information receiving terminal activation signal (step S3), the incoming call detecting unit 7 detects the information receiving terminal activation signal, and the waveform thereof Is sent to the main control unit 1. The main control unit 1 determines that it is an information reception terminal activation signal from the length of the ON period of the waveform of the received signal, and instructs the DC loop forming unit 10 to form a DC loop. Other operations are the same as those in the first embodiment.

  When the operation sequence shown in FIG. 3 is performed, when the receiving side telephone device receives the information receiving terminal activation signal (steps S3 and S15), the incoming call detecting unit 7 detects the information receiving terminal activation signal and displays the waveform. Send to the main control unit 1. The main control unit 1 determines that it is an information reception terminal activation signal from the length of the ON period of the waveform of the received signal, and instructs the DC loop forming unit 10 to form a DC loop. Other operations are the same as those in the first embodiment.

  In addition, the telephone device according to the present embodiment is configured to accurately display the caller information even when the next incoming signal that has received the modem signal changes from the ringing signal to the information receiving terminal activation signal. FIG. 5 shows an operation sequence in that case. In this operation sequence, the receiving side telephone apparatus receives the modem signal of the caller information of the caller A, and after the exchange transmits the call signal, the caller A abandons the call and immediately after that another call is sent. This is the case where the party B calls the same destination telephone device. In this sequence, the procedure from when the caller A places a call (procedure S1) to when the receiving side telephone device receives a call signal (procedure S7) and performs ringing and display of caller information is as shown in FIG. The same.

  As shown in FIG. 5, in response to the transmission of the calling signal from the exchange (step S7), the incoming call ringing and the display of the caller information are performed on the incoming call side telephone apparatus, but the user of the incoming call side telephone apparatus picks up the handset. If the caller A puts the handset on the hook before answering (step S11), the DC loop between the caller A's telephone device and the exchange is disconnected, and the call is abandoned in the exchange. The polarity of the telephone line with the receiving side telephone device is reversed (step S12).

  Immediately after that, when another caller B calls the same callee telephone device as the callee of caller A (step S13), the exchange changes the polarity of the telephone line to which the callee telephone device is connected. Inverted to notify the start of the incoming call operation (procedure S14), and then transmits the information receiving terminal activation signal shown in FIG. 9A to the called telephone device (procedure S15). At this time, switching between the call signal transmitted in step S7 and the information receiving terminal activation signal transmitted in step S15 is a period shorter than 2 seconds, which is the off period of the call signal, as shown in FIG. 9C. It is assumed that

  In the incoming side telephone device, the incoming call detection unit 7 detects the information reception terminal activation signal and sends the waveform to the main control unit 1. The main control unit 1 determines that the signal is an information receiving terminal activation signal from the length of the ON period of the waveform of the received signal, stops the ringing tone output in the ringing tone output unit 12, and displays the incoming call display unit 13. Is stopped, and the display of the caller information on the display unit 14 is stopped, and the DC loop forming unit 10 is instructed to form a DC loop. The DC loop forming unit 10 operates a switch provided in the line control unit 2 to form a DC loop, and transmits a primary response signal by closing the telephone line (step S16). The subsequent steps S17 to S22 are the same as steps S5 to S10 in FIG. 2, and the caller information received in step S17 is displayed when the call signal is received in step S19.

  Here, in the case of the first embodiment, after the call signal is received, the stoppage of the incoming call due to the abandonment of the caller is detected based on the existence of the off period exceeding the off period (2 seconds) of the call signal. Therefore, if the pattern of the incoming signal is switched as shown in FIG. 9C, it is impossible to detect the stop of the incoming call, and therefore, step S16 and subsequent steps cannot be executed. On the other hand, in this embodiment, the length of the ON period of the incoming signal is monitored, and the arrival of the calling signal is detected by detecting the presence of the ON period longer than 0.5 seconds and 1 second or shorter. Since the arrival of the information receiving terminal activation signal is detected by detecting the presence of the ON period of 5 seconds or less, the call signal and the information receiving terminal activation signal that follows are detected from the incoming signal pattern of FIG. The caller information of the party B can be received and displayed.

[Third Embodiment]
FIG. 6 is a block diagram of a telephone device according to the third embodiment of the present invention. In this figure, the same reference numerals as those in FIG. 1 are assigned to the same parts in FIG.

  The telephone device according to the present embodiment includes a main control unit 1 composed of a microcomputer that controls the entire device, a line control unit 2 that is connected to a telephone line and performs connection control of the telephone line, and line control. A voice path control unit 3 connected to the unit 2 for switching a voice signal path between the handset 4, the speaker 5, and the microphone 6; an incoming call detection unit 7 connected to the line control unit 2; and a data demodulation unit 8, the hook state detection part 9, and the polarity inversion detection part 17a are provided. In addition, the telephone device includes a DC loop forming unit 10, a key input unit 11, a ringing tone output unit 12, an incoming call display unit 13, a display unit 14, a non-volatile memory 15, and a timer 16 that are connected to the main control unit 1. , And a counter 18. That is, the telephone device according to the present embodiment is obtained by adding the polarity inversion detection unit 17a and the counter 18 to the telephone device according to the first embodiment.

  The polarity reversal detection unit 17a detects the polarity reversal of the telephone line (L1, L2), that is, changes from the initial state where L1 is negative, L2 is positive, L1 is positive, and L2 is negative. Notify the control unit 1. The counter 18 is used to count the number of receptions of incoming signals detected by the incoming detection unit 7.

  Next, referring to FIGS. 2 to 5, regarding the operation of the telephone device according to the present embodiment, [4] When the incoming signal after receiving the modem signal is a ringing signal (secondary incoming signal) (FIG. 2) [5] When the incoming signal after receiving the modem signal is an information receiving terminal activation signal (primary incoming signal) (FIG. 3), [6] When there is no incoming signal after receiving the modem signal (FIG. 4) Explain in order. The “telephone device” in these figures is a telephone device compatible with the caller information notification service having the configuration shown in FIG. 6, and the user has a contract for the caller information notification service.

[4] When the incoming signal after receiving the modem signal is a ringing signal (secondary incoming signal) (FIG. 2)
This is a normal operation sequence similar to FIG. First, when a caller makes a call to a telephone device (procedure S1), the exchange notifies the start of an incoming operation by inverting the polarity of the telephone line to which the incoming telephone device is connected (procedure S2). Next, the information receiving terminal activation signal shown in FIG. 9A is transmitted to the receiving side telephone device (step S3). In the incoming side telephone device, the polarity reversal detection unit 17a detects the polarity reversal and notifies the main control unit 1 of it. When notified of polarity reversal, the main control unit 1 resets the count value of the counter 18 to zero. The incoming call detection unit 7 detects an information receiving terminal activation signal. At this time, the incoming call detection unit 7 notifies the main control unit 1 that there has been an incoming signal by detecting the presence of the leading ON period of the information receiving terminal activation signal and outputs it to the counter 18. The value of the counter 18 is incremented to “1” by the output of the incoming call detection unit 7. The main control unit 1 refers to the value of the counter 18 so that the current incoming signal is the first incoming signal with the polarity reversed from the initial state (idle state). And the DC loop forming unit 10 is instructed to form a DC loop. The DC loop forming unit 10 operates a switch provided in the line control unit 2 to form a DC loop, and transmits a primary response signal by closing the telephone line (step S4).

  When the exchange detects this primary response signal, it converts the caller information of the caller into a modem signal and transmits it to the called telephone device (step S5). In the receiving side telephone device, the data demodulating unit 8 demodulates the caller information and sends it to the main control unit 1. The main control unit 1 stores the received caller information in an internal RAM (not shown). Further, the main control unit 1 determines that the reception of the caller information is completed when receiving the caller information from the data demodulation unit 8, and instructs the DC loop forming unit 10 to disconnect the DC loop. The timer 16 starts counting. The DC loop forming unit 10 operates a switch provided in the line control unit 2 to cut the DC loop and open the telephone line (step S6). The timer 16 generates a time-out signal and outputs the time-out signal to the main control unit 1 when the preset constant time is finished, but normally, the incoming call detection unit 7 detects the next incoming signal before the count is finished. Cleared by the main control unit 1 based on the detection.

  When the exchange detects this reception completion signal, it transmits a ringing signal shown in FIG. 9B to the called telephone device (step S7) and transmits an RBT (ringback tone) to the caller. In the incoming side telephone device, the incoming call detection unit 7 detects a call signal. At this time, the incoming call detection unit 7 detects the presence of an on-period at the beginning of the call signal, thereby notifying the main control unit 1 that there is an incoming signal and outputting it to the counter 18. The value of the counter 18 is incremented to “2” by the output of the incoming call detection unit 7. By referring to the value of the counter 18, the main control unit 1 determines that the current incoming signal is the second incoming signal in a state where the polarity is inverted, and thus determines that it is the calling signal, and the count value And the count of the timer 16 is stopped and the count value is cleared. Further, it instructs the ring tone output unit 12 to output the ring tone and instructs the incoming call display unit 13 to emit the incoming call display pattern. Furthermore, the caller information previously stored in the RAM is sent to the display unit 14 to be displayed.

  The user of the receiving side telephone device can confirm the caller by knowing that the call is being received by listening to the ringing tone and viewing the caller information displayed on the display unit 14. When the user of the receiving side telephone device picks up the handset 4, the hook state detection unit 9 detects off-hook and notifies the main control unit 1, so the main control unit 1 notifies the DC loop forming unit 10 of the DC loop. Direct the formation. The DC loop forming unit 10 forms a DC loop and transmits a secondary response signal by closing the telephone line (step S8). When the exchange detects this secondary response signal, it reverses the polarity of the telephone line connected to the called telephone device (step S9), and sets the call state between the caller and the called telephone device (step S9). Procedure S10).

[5] When the incoming signal after receiving the modem signal is an information receiving terminal activation signal (primary incoming signal) (FIG. 3)
In this sequence, after the receiving side telephone apparatus receives the modem signal of the calling party information of the calling party A, the calling party A abandons the outgoing call, and immediately after that, another calling party B calls the receiving side telephone apparatus. This is the case when a call is made. In this sequence, the process from the time when the caller A places a call (procedure S1) to the time when the receiving side telephone device completes reception of the modem signal and disconnects the DC loop (procedure S6) is the same as FIG.

  As shown in FIG. 3, the timing at which the caller A abandoned the call (step S11) is immediately after the exchange receives a modem signal reception completion signal (DC loop disconnection) from the incoming side telephone device (step S6). Suppose there was. When the caller A abandons the call and the handset enters an on-hook state, the DC loop between the telephone device of the caller A and the exchange is disconnected, so the exchange determines that the call is abandoned. Then, the polarity of the telephone line with the receiving side telephone device is reversed (step S12).

  Immediately thereafter, when another caller B calls the same party as the callee of caller A (procedure S13), the exchange reverses the polarity of the telephone line to which the called telephone device is connected and receives the call. The start of the operation is notified (procedure S14), and then an information receiving terminal activation signal shown in FIG. 9A is transmitted to the called telephone device (procedure S15). In the incoming side telephone device, the polarity inversion detection unit 17a detects the polarity inversion and notifies the main control unit 1 of the polarity inversion. Further, the incoming call detection unit 7 detects the information reception terminal activation signal and notifies the main control unit 1 of it. The main control unit 1 resets the counter 18 in the same manner as in the polarity reversal in step S2. Also, the main control unit 1 refers to the value of the counter 18 when an incoming call is notified from the incoming call detection unit 7 in the same manner as when the information receiving terminal activation signal is received in step S3, so that the current incoming signal is Since it is the first incoming signal after polarity reversal, it is determined that it is an information receiving terminal activation signal, and the DC loop forming unit 10 is instructed to form a DC loop. The DC loop forming unit 10 operates a switch provided in the line control unit 2 to form a DC loop, and transmits a primary response signal by closing the telephone line (step S16). The subsequent sequence is the same as that after step S5 in FIG.

  Here, in the case of the conventional device, the first incoming signal counted from the initial state is determined as the information receiving terminal activation signal, the modem signal is received, the telephone line is opened, and the received incoming signal is the call signal. If another caller B calls the same party as the callee's callee immediately after the caller A abandons the call, the receiving terminal activation signal is mistakenly determined as a call signal. However, in this embodiment, since it is the first incoming signal with the polarity reversed in the above case, it is correctly determined that it is the information receiving terminal activation signal. As a result, control is performed so as not to ring the incoming call and display the sender information.

[6] No incoming call after receiving modem signal (Fig. 4)
This sequence is for the case where the caller abandons the call after the receiving telephone apparatus receives the modem signal and no call is made to the called telephone apparatus after a certain period of time. . In this sequence, after the caller makes a call (procedure S1), the call is abandoned and the polarity of the telephone line with the receiving side telephone device is restored (procedure S12). Is the same.

  As described with reference to FIG. 3, in the receiving side telephone device, the timer 16 starts counting when the reception of the caller information is completed, and when the next incoming signal is detected within a certain time, the timer 16 To clear. Here, since the next incoming signal is not detected within a certain time, the timer 16 generates a time-out signal and outputs it to the main control unit 1. When the main control unit 1 receives the timeout signal, the main control unit 1 discards the caller information previously stored in the RAM. As a result, the state of the telephone device returns to the first idle state of the sequence, and the line can be captured.

[Fourth Embodiment]
FIG. 7 is a block diagram showing a configuration of a telephone device according to the fourth embodiment of the present invention. In this figure, the same components as those in FIG. 6 are denoted by the reference numerals used in FIG. In the telephone device according to the present embodiment, a polarity reversal detection unit 17b is provided in place of the polarity reversal detection unit 17a in the telephone device shown in FIG. 6, and the timer 16 is omitted. The polarity reversal detection unit 17b is in an initial state where the telephone line polarity is L1 minus and L2 plus, and L1 is minus and L2 is plus when the polarity is reversed (L1 is plus and L2 is minus). Is detected and notified to the main control unit 1. Configurations and functions of other components in the telephone device according to the present embodiment are the same as those of the telephone device in FIG.

  Next, referring to FIGS. 2 to 5, regarding the operation of the telephone device according to the present embodiment, [7] When the incoming signal after receiving the modem signal is a ringing signal (secondary incoming signal) (FIG. 2) [8] When the incoming signal after receiving the modem signal is an information receiving terminal activation signal (primary incoming signal) (FIG. 3), [9] When there is no incoming signal after receiving the modem signal (FIG. 4) Explain in order. The “telephone device” in these figures is a telephone device compatible with the caller information notification service having the configuration of FIG. 7, and it is assumed that the user subscribes to the caller information notification service.

[7] When the incoming signal after receiving the modem signal is a ringing signal (secondary incoming signal) (FIG. 2)
First, when caller A makes a call to the telephone device (procedure S1), the exchange notifies the start of the incoming operation by inverting the polarity of the telephone line to which the incoming telephone device is connected (procedure S2). Next, the information receiving terminal activation signal shown in FIG. 9A is transmitted to the receiving side telephone device (step S3). In the receiving side telephone device, the incoming call detecting unit 7 detects the information receiving terminal activation signal. At this time, the incoming call detection unit 7 notifies the main control unit 1 that there has been an incoming signal by detecting the presence of the leading ON period of the information receiving terminal activation signal and outputs it to the counter 18. The value of the counter 18 is reset by the main control unit 1 when the destination telephone device is in an idle state, and is incremented to “1” by the output of the incoming call detection unit 7. The main control unit 1 refers to the value of the counter 18 to determine that the current incoming signal is the first incoming signal counted from the idle state, so that it is the information receiving terminal activation signal, The DC loop forming unit 10 is instructed to form a DC loop. The DC loop forming unit 10 operates a switch provided in the line control unit 2 to form a DC loop, and transmits a primary response signal by closing the telephone line (step S4).

  Thereafter, the procedure up to step S7 in which the exchange transmits a call signal is the same as that in the first embodiment. In the incoming side telephone device, the incoming call detection unit 7 detects a call signal. At this time, the incoming call detection unit 7 detects the presence of an on-period at the beginning of the call signal, thereby notifying the main control unit 1 that there is an incoming signal and outputting it to the counter 18. The value of the counter 18 is incremented to “2” by the output of the incoming call detection unit 7. The main control unit 1 refers to the value of the counter 18 so that the current incoming signal is the second incoming signal counted from the initial state, so that it is determined as the ringing signal, and the incoming call tone The output unit 12 is instructed to output a ringtone, and the incoming call display unit 13 is instructed to emit an incoming call display pattern. Further, the caller information previously stored in the RAM is sent to the display unit 14 for display.

  Thereafter, the user of the called telephone apparatus responds, and the polarity of the telephone line connected to the called telephone apparatus is reversed to L1 being negative and L2 being positive, and the calling telephone apparatus ( Step S10 is the same as that in the first embodiment until a call state is established between the calling side telephone device and the telephone device of the called side telephone device. In the receiving side telephone device, the polarity reversion detecting unit 17b detects the repolarization and notifies the main control unit 1 of the detection. When receiving this notification, the main control unit 1 clears the counter 18 and discards the caller information previously stored in the RAM.

[8] When the incoming call after receiving the modem signal is an information receiving terminal activation signal (primary incoming call signal) (FIG. 3)
In this sequence, the process is the same as that in FIG. 2 from when the caller A makes a call until the receiving side telephone device completes reception of the modem signal and disconnects the DC loop.

  As shown in FIG. 3, the timing at which the caller A abandoned the call (step S11) is immediately after the exchange receives a modem signal reception completion signal (DC loop disconnection) from the incoming side telephone device (step S6). Suppose there was. When the caller A abandons the call and the handset enters an on-hook state, the DC loop between the telephone device of the caller A and the exchange is disconnected, so the exchange determines that the call is abandoned. Then, the polarity of the telephone line with the receiving side telephone device is reversed (step S12). In the receiving side telephone device, the polarity reversion detecting unit 17b detects the repolarization and notifies the main control unit 1 of the detection. When receiving this notification, the main control unit 1 clears the counter 18 and discards the caller information previously stored in the RAM.

  Immediately thereafter, when another caller B calls the same party as the callee of caller A (procedure S13), the exchange reverses the polarity of the telephone line to which the receiving telephone device is connected and receives the call. The start of the operation is notified (procedure S2), and then the information receiving terminal activation signal shown in FIG. 9A is transmitted to the called telephone device (procedure S3). In the incoming side telephone device, the incoming call detection unit 7 detects the information receiving terminal activation signal and notifies the main control unit 1 of the signal. The main control unit 1 refers to the value of the counter 18 when receiving an incoming call from the incoming call detection unit 7 in the same manner as when receiving the information receiving terminal activation signal in step S3, so that the current incoming signal is restored in polarity. Since it is the first incoming signal counted from the extreme time, it is determined that it is an information receiving terminal activation signal, and the DC loop forming unit 10 is instructed to form a DC loop. The DC loop forming unit 10 operates a switch provided in the line control unit 2 to form a DC loop, and transmits a primary response signal by closing the telephone line (step S16). The subsequent sequence is the same as that after step S5 in FIG.

  Here, in the case of the conventional device, the first incoming signal counted from the initial state is determined as the information receiving terminal activation signal, the modem signal is received, the telephone line is opened, and the received incoming signal is the call signal. If another caller B calls the same party as the callee's callee immediately after the caller A abandons the call, the receiving terminal activation signal is mistakenly determined as a call signal. However, in this embodiment, since it is the first incoming signal counting from the time when the polarity is reversed, it is a receiving terminal activation signal. As a result, it can be controlled so that the incoming call ringing and the caller information display are not performed.

[9] When there is no incoming call after receiving a modem signal (Figure 4)
This sequence is for the case where the caller abandons the call after the called telephone device receives the modem signal. In this sequence, the sequence from when the caller places a call (procedure S1) until the caller abandons the call and restores the polarity of the telephone line to the destination telephone device (procedure S12). Is the same as FIG.

  In the receiving side telephone device, the polarity reversion detecting unit 17b detects the repolarization and notifies the main control unit 1 of the detection. When receiving this notification, the main control unit 1 clears the counter 18 and discards the caller information previously stored in the RAM. As a result, the state of the telephone device returns to the first idle state of the sequence, and the line can be captured.

  In the above description, the telephone device according to the third embodiment includes the polarity reversal detection unit 17a, and the telephone device according to the fourth embodiment includes the polarity reversal detection unit 17b. Both the polarity reversal detection unit 17a and the polarity reversal detection unit 17b may be provided in a single telephone apparatus, and any one of them may be configured to be operable according to a user setting. In the above embodiment, the counter 18 is configured to count only the primary incoming signal and the secondary incoming signal. However, the counter 18 may be configured to count modem signals. Furthermore, although the above embodiment demonstrated the case where this invention was applied to the telephone apparatus, this invention is applicable also to the facsimile apparatus with a telephone.

It is a block diagram of the telephone apparatus which concerns on the 1st and 2nd embodiment of this invention. In the telephone apparatus which concerns on the 1st thru | or 4th embodiment of this invention, it is a figure which shows the operation | movement sequence when the incoming call after receiving a modem signal is a paging signal. In the telephone apparatus which concerns on the 1st thru | or 4th embodiment of this invention, it is a figure which shows the operation | movement sequence when the incoming call after receiving a modem signal is an information receiving terminal starting signal. It is a figure which shows the operation | movement sequence when there is no incoming call after receiving a modem signal in the telephone apparatus which concerns on the 1st thru | or 4th embodiment of this invention. In the telephone apparatus which concerns on the 2nd Embodiment of this invention, it is a figure which shows the operation | movement sequence when an incoming signal changes from a ringing signal to an information receiving terminal starting signal after receiving a modem signal. It is a block diagram of the telephone apparatus which concerns on the 3rd Embodiment of this invention. It is a block diagram of the telephone apparatus which concerns on the 4th Embodiment of this invention. It is a figure which shows the operation | movement sequence in the case of performing a sender | caller information notification service. It is a figure which shows the waveform of an information receiving terminal starting signal and a calling signal.

Explanation of symbols

  7 ... incoming call detection unit, 8 ... data demodulation unit, 10 ... DC loop generation unit, 12 ... ringing tone output unit, 13 ... incoming call display unit, 14 ... display unit, 16 ... Timer, 17a ... Polarity reversal detection unit, 17b ... Polarity reversal detection unit, 18 ... Counter.

Claims (6)

A communication terminal device that accommodates an outside line connected to an exchange that sends an activation signal, a caller information signal, and a call signal to a communication terminal device on the receiving side, and is capable of displaying caller information,
A communication terminal comprising: determination means for determining whether a received signal is the call signal; and means for displaying the caller information only when it is determined that the received signal is the call signal. apparatus. A communication terminal device that accommodates an outside line connected to an exchange that sends an activation signal, a caller information signal, and a call signal to a communication terminal device on the receiving side, and is capable of displaying caller information,
A communication terminal apparatus comprising: means for determining whether a received signal is the activation signal; and means for displaying the caller information when it is determined that the received signal is not the activation signal. 3. The communication terminal apparatus according to claim 1, wherein the determination unit determines based on a waveform of a received signal. Inverts the polarity of the telephone line at the start of transmission, sends an activation signal, caller information signal, and call signal, and accommodates an external line connected to the switch that reverses the polarity of the telephone line when the caller stops calling A communication terminal device capable of displaying caller information,
A polarity reversal detecting means for detecting a reversal of the polarity of the telephone line; a counting means for counting the number of receptions of the signal received when the polarity reversal detecting means detects the polarity reversal; And a means for displaying the caller information only when the count value reaches a predetermined value. Inverts the polarity of the telephone line at the start of transmission, sends an activation signal, caller information signal, and call signal, and accommodates an external line connected to the switch that reverses the polarity of the telephone line when the caller stops calling A communication terminal device capable of displaying caller information,
Polarity repolarization detecting means for detecting that the polarity of the telephone line is in a state before inversion or returning to the state, and that the polarity is in a state before inversion by the polarity repolarization detecting means or Counting means for counting the number of receptions of a signal received since it was detected that the status returned to the state, and means for displaying the caller information only when the count value of the counting means reaches a predetermined value A communication terminal device. 6. The communication terminal apparatus according to claim 4, wherein the counting means counts only the activation signal and the calling signal among the received signals.

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