JP2006108820A - Communication terminal device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform proper reception processing in accordance with a signal to be received after reception of an originator information signal in a communication terminal device corresponding to originator information notification service. <P>SOLUTION: An incoming call detecting unit 7 detects an incoming call signal (call signal, information reception terminal activating signal etc.) received by a line control unit 2 from a telephone line, and transmits it to a main control unit 1 and to a counter 18. A data decoding unit 8 decodes originator information from a modem signal received by the unit 2 and transmits it to the unit 1. A polarity reversion detecting unit 17a detects the polarity reversion of the telephone line, and notifies the unit 1 of it. The unit 1 determines a first incoming call signal as an information receiving terminal activating signal and a second incoming call signal as a call signal in the state where the polarity reversion of the telephone line is detected. When the incoming call signal is the call signal, a call tone outputting unit 12 makes incoming call ringing, and a display unit 14 displays the originator information. <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. This is a service that displays the caller information by transmitting to the caller information notification service compatible telephone device.

When the caller information notification service is performed, as shown in FIG. 6, when the subscriber line switch receives a call from the caller, it is connected to a communication terminal (hereinafter referred to as a receiving terminal) as a call destination. The polarity of the current telephone line is reversed (procedure S31) to notify the start of the incoming operation, and then the information receiving terminal activation signal (CAR) shown in FIG. 7A 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, 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 the calling signal shown in FIG. 7B to the receiving terminal (step S36). The receiving terminal performs ringing and displays the caller information received first (step S37). When the user of the receiving terminal picks up the handset and goes off-hook, the receiving terminal transmits a secondary response signal to the subscriber line switch by closing the telephone line. 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 conventional caller information notification service compatible telephone device, after the receiving terminal completes reception of the caller information and opens the line, the other caller receives the call immediately after the caller abandons the call. When a connection request is made to the terminal, the subscriber line switch detects the abandonment of the call, reverses the polarity of the telephone line (returns it to the state before inversion), and then receives the incoming call as described above. The polarity of the telephone line connected to the terminal is reversed, and an information receiving terminal activation signal is transmitted to the receiving terminal.

  However, the conventional communication terminal corresponding to the caller information notification service, when the information receiving terminal activation signal shown in FIG. 7 (a) or the call signal shown in FIG. Only the arrival detection is performed by detecting the presence of the period, and the two types of signals are not identified. The polarity of the signal from the idle state is reversed (step S31), and the first received signal is determined as the information receiving terminal activation signal. Since the incoming signal received after the caller information is received and the line is opened (step S35) is determined as the ringing signal, if the information receiving terminal activation signal is received after the line is released, the incoming call is erroneously ringed. Will go. 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 its purpose is to perform an appropriate incoming call ringing after receiving caller information in a communication terminal device corresponding to the caller information notification service. is there.

The invention according to claim 1 is an exchange that 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 that accommodates an external line to be connected, the polarity reversal detecting means for detecting a reversal of the polarity of the telephone line, and a signal received when the reversal of polarity is detected by the polarity reversal detecting means And a means for ringing an incoming call only when the count value of the counting means reaches a predetermined value.
The invention according to claim 2 is an exchange that 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 that accommodates an external line to be connected, the 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 the polarity repolarization detecting means The count means for counting the number of times of reception of the signal received from when it is detected that the polarity is in a state before inversion or has returned to the state, and the count value of the count means has reached a predetermined value A communication terminal device comprising means for ringing an incoming call only when
The invention according to claim 3 is the communication terminal apparatus according to claim 1 or 2, wherein the counting means counts only the activation signal and the calling signal among the received signals. is there.

  According to the present invention, when the caller stops sending after receiving the caller information, the polarity of the telephone line returns to the state before inversion, so the counting means clears the count value before receiving the caller information. Therefore, when the activation signal is received immediately after that, the count value does not reach the predetermined value, so that no ringing is performed.

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 present embodiment is connected to a main control unit 1 composed of a microcomputer (hereinafter referred to as a microcomputer) that controls the entire apparatus, and the telephone line. The line control unit 2 that performs connection control of the telephone line and the like, and the audio signal path switching between the handset 4, the speaker 5, and the microphone (hereinafter referred to as a microphone) 6 that is connected to the line control unit 2 are performed. The voice path control unit 3 includes an incoming call detection unit 7, a data demodulation unit 8, a hook state detection unit 9, and a polarity inversion detection unit 17a connected to the line control unit 2.

  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, etc.) received by the line control unit 2 from the telephone line, and notifies the main control unit 1 and a counter 18 described later. 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 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.

  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. Here, the timer 16 is used for measuring time when the main control unit 1 executes various processes, and the counter 18 is used for counting the number of receptions of the incoming signal.

  The DC loop forming unit 10 uses the information reception terminal activation signal shown in FIG. 7A when the hook state detection unit 9 detects an off-hook of the handset 4 and the signal detected by the incoming call detection unit 7. When the main controller 1 determines that there is a telephone line, a switch (not shown) provided in the line controller 2 is closed to form a DC loop in the telephone line with the subscriber line switch, Close the 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 is controlled by 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. Is output. The incoming call display unit 13 includes an LED (light emitting diode), and displays the incoming call sound in the same manner as the output of the ringing tone under the control of the main control unit 1. 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.

  Next, referring to FIGS. 2 to 5, 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 shown in FIG. 1, and it is assumed that the user subscribes to 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 (procedure S2) to notify the start of the incoming operation, and then the information receiving terminal activation signal shown in FIG. 7A is transmitted to the called telephone device (procedure S3). ). In the receiving side telephone device, the polarity inversion detection unit 17a detects the polarity inversion and notifies the main control unit 1 of the inversion. When notified of polarity reversal, the main control unit 1 resets the count value of the counter 18 to zero. The information receiving terminal activation signal is detected by the incoming call detection unit 7. 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). Is determined, 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 caller information is demodulated by the data demodulating unit 8 and sent 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 count end signal and outputs the count end signal to the main control unit 1 when counting for a predetermined time set in advance is completed. Usually, the incoming call detection unit 7 detects the next incoming signal before the count ends, Based on the detection, it is cleared by the main control unit 1.

  When the exchange detects this reception completion signal, it transmits a call signal shown in FIG. 7B to the telephone apparatus on the called side (step S7) and transmits an RBT (ringback tone) to the caller. In the receiving side telephone device, the ringing signal is detected by the incoming call detection unit 7. 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 in the state where the polarity is inverted. 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 ring tone pattern and the incoming call display pattern are stored in advance in the nonvolatile memory 15 or the like.

  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 signal) (FIG. 3)
This sequence is for the case where the caller A abandons the call after the callee telephone apparatus receives the modem signal and immediately after that, another caller B calls the callee telephone apparatus. is there. 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 exchange receives the modem signal reception completion signal (DC loop disconnection) from the incoming side telephone device as shown in FIG. 3 (step S6). Suppose that it was immediately after. When the caller A abandons the call and the handset enters an on-hook state, the DC loop between the caller A and the exchange is disconnected, so the exchange determines that the call is abandoned and The polarity of the telephone line with the 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 (step S13). The information receiving terminal activation signal shown in FIG. 7A is transmitted to the destination telephone device together with step S14) (step S15). In the receiving side telephone device, the polarity inversion detection unit 17a detects the polarity inversion and notifies the main control unit 1 of the inversion. The information receiving terminal activation signal is detected by the incoming call detection unit 7 and is notified to the main control unit 1. 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, if it is determined that it is an information receiving terminal activation signal, it instructs the DC loop forming unit 10 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 closed, and the received incoming signal is the call signal. Therefore, immediately after the caller A abandons the call, if another caller B calls the same party as the callee of the caller A, the receiving terminal activation signal is mistaken for the call signal. In this embodiment, since it is the first incoming signal with the polarity reversed, it is correctly determined that it is a receiving terminal activation signal. As a result, control is performed so as not to ring the incoming call and display the sender information.

[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 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 count end signal and outputs it to the main control unit 1. When receiving the count end 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 one 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 embodiment.

[Second Embodiment]
FIG. 5 is a block diagram showing the configuration of the telephone device according to this embodiment. In this figure, the same components as those in FIG. 1 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. 1, and the timer 16 is omitted. The polarity repolarization detection unit 17b detects that the polarity of the telephone line has been reversed (L1 is positive, L2 is negative), L1 is negative, and L2 is positive and notifies the main control unit 1 To do. 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, [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. 5, and it is assumed that the user subscribes to the caller information notification service.

[1] 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 inverts the polarity of the telephone line to which the incoming telephone device is connected (procedure S2) to notify the start of the incoming operation. Next, the information receiving terminal activation signal shown in FIG. 7A is transmitted to the receiving side telephone device (step S3). In the receiving side telephone device, the information receiving terminal activation signal is detected by the incoming call detection unit 7. 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. 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 receiving side telephone device, the ringing signal is detected by the incoming call detection unit 7. 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. When the main control unit 1 refers to the value of the counter 18 and the current incoming signal is the second incoming signal counted from the initial state, the main control unit 1 determines that the incoming signal is a ringing signal. 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 ( The procedure is the same as that in the first embodiment up to step S9 in which a call state is established between the calling side telephone device and the telephone device of the called side telephone device. In the incoming side telephone device, the polarity reversal detection unit 17b detects the repolarization and notifies the main control unit 1 of the depolarization. When receiving this notification, the main control unit 1 clears the counter 18 and discards the caller information previously stored in the RAM.

[2] 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 exchange receives the modem signal reception completion signal (DC loop disconnection) from the incoming side telephone device as shown in FIG. 3 (step S6). Suppose that it was immediately after. When the caller A abandons the call and the handset enters an on-hook state, the DC loop between the caller A and the exchange is disconnected, so the exchange determines that the call is abandoned and The polarity of the telephone line with the telephone device is reversed (step S12). In the incoming side telephone device, the polarity reversal detection unit 17b detects the repolarization and notifies the main control unit 1 of the depolarization. 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 called telephone device is connected ( Procedure S2) The start of the incoming call operation is notified, and then the information receiving terminal activation signal shown in FIG. 7 (a) is transmitted to the called telephone device (procedure S3). In the receiving side telephone device, the information receiving terminal activation signal is detected by the incoming call detection unit 7 and notified to the main control unit 1. 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, if it is determined 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 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 closed, and the received incoming signal is the call signal. Therefore, immediately after the caller A abandons the call, if another caller B calls the same party as the callee of the caller A, the receiving terminal activation signal is mistaken for the call signal. In this embodiment, since it is the first incoming signal counting from when the polarity is reversed, it is the receiving terminal activation signal. As a result, control is performed so as not to ring the incoming call and display the caller information.
In this case, the receiving terminal activation signal is not mistakenly determined as a calling signal.

[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 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 incoming side telephone device, the polarity reversal detection unit 17b detects the repolarization and notifies the main control unit 1 of the depolarization. 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 first embodiment includes the polarity reversal detection unit 17a, and the telephone device according to the second 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.

1 is a block diagram of a telephone device according to a first embodiment of the present invention. In the telephone apparatus which concerns on the 1st and 2nd 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 and 2nd 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 and 2nd embodiment of this invention. 1 is a block diagram of a telephone device according to a first embodiment of the present 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 (3)

Inverts the polarity of the telephone line at the start of outgoing call, sends an activation signal, caller information signal, and call signal, and accommodates an external line connected to a switch that reverses the polarity of the telephone line when the caller stops calling A communication terminal device,
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; A communication terminal device comprising means for ringing an incoming call only when the count value reaches a predetermined value. Inverts the polarity of the telephone line at the start of outgoing call, sends an activation signal, caller information signal, and call signal, and accommodates an external line connected to a switch that reverses the polarity of the telephone line when the caller stops calling A communication terminal device,
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 A counting means for counting the number of receptions of a signal received from when it is detected that the state has been recovered, and a means for ringing an incoming call only when the count value of the counting means reaches a predetermined value. A communication terminal device. 3. The communication terminal apparatus according to claim 1, wherein the counting unit counts only the activation signal and the calling signal among the received signals.

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