JPH10164254A - Communication terminal equipment having automatic dial function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a communication terminal equipment without stating automatic dialing operation at the midst of the communication of the caller telephone number display service by a reception terminal equipment connected in parallel. SOLUTION: This terminal equipment is provided with a line state monitor means 5 that monitors a voltage level and polarity inversion of a line L and a signal sent from an exchange, an automatic dial means 4 that closes automatically a DC loop to send a selection signal when a prescribed condition is satisfied, and a dialing control means 1. When the line state monitor means 5 detects no call signal from a reception terminal equipment sent from the exchange for a prescribed time after an opened DC loop by the reception terminal equipment is detected, the dialing control means 1 permits the operation of the automatic dial means 4 and inhibits the operation of the automatic dial means 4 when the call signal is detected for a prescribed time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiving terminal having a function of displaying a calling telephone number, and a communication terminal having an automatic calling function such as a facsimile apparatus connected in parallel to the same line.

[0002]

2. Description of the Related Art Recently, invasion of privacy by nuisance calls has become a major social problem.
First, the introduction of a calling telephone number display service is being prepared. According to this, on the receiving side, the telephone number or the like of the calling side is displayed before the response, so that it is possible to take measures corresponding to the other party.

The basic operation of the calling telephone number display service will be described below with reference to the sequence diagram of FIG.
In the figure, (1) to (9) are numbers assigned to each operation, and the ID receiving terminal is a terminal such as a telephone or a facsimile machine that can use this service.

When a call is made to a receiving terminal for which a service contract has been made in advance, the subscriber line exchange inverts the polarity of the subscriber line, which is a line on the receiving terminal side (1), and sends an ID receiving terminal start signal. (2). When the receiving terminal is ready to receive the source information, the DC circuit in the terminal is closed (DC loop closed) and a primary response signal is transmitted (3). On the other hand, when the exchange determines the primary response signal from the DC resistance value, the exchange transmits information such as the source number, which is a modem signal, to the receiving terminal (4), and then opens the DC circuit from the receiving terminal. After receiving the reception completion signal due to (DC loop opening) (5), a calling signal is transmitted (6).

When the ID receiving terminal receives a calling signal, it rings a ringing tone to prompt an incoming call. However, the ID number of the receiving party can be confirmed in advance by receiving the source information and displaying it on the display. (For example, switching to an answering machine). Here, when the call signal is answered by picking up the handset or the like, the DC circuit is closed again (DC loop is closed) and a secondary response signal is transmitted (7). A call can be made (8), (9).

[0006] The modem signal including the caller number includes, in addition to the telephone number of the communication terminal device of the caller, number information such as a dial-in number when a dial-in contract is made. If the sender number cannot be notified, the reason is notified. Incidentally, the reasons include a call from a public telephone, a call when non-notification is designated by an operation before inputting a telephone number (dial "184"), a call from outside the service providing area, and the like.

On the other hand, a communication terminal device such as a facsimile device or an automatic alarm device for notifying detection of a fire or an illegal intrusion to a predetermined destination has an automatic transmission function. Allows timed communication.

[0008]

However, when a receiving terminal that can use the calling telephone number display service and a communication terminal device having the automatic calling function are connected in parallel to the same line, the communication terminal device The side does not recognize the communication procedure of the outgoing telephone number display service described with reference to FIG. 6, and thus determines that the apparatus is on standby, and may start the outgoing operation during this procedure. Communication could not be performed normally.

The present invention has been proposed in view of such circumstances, and a receiving terminal connected in parallel starts an automatic calling operation during communication of a calling telephone number display service. It is an object of the present invention to provide a communication terminal device that can prevent such a problem.

[0010]

A communication terminal device proposed to achieve the above object comprises a line state monitoring means for monitoring a line voltage level and polarity reversal, and a signal sent from an exchange, When the condition (1) is satisfied, the DC loop is automatically closed and an automatic transmission means for transmitting a selection signal is provided.

According to the first aspect of the present invention, the transmission control means includes a calling signal of the receiving terminal transmitted from the exchange during a first predetermined time after the line state monitoring means detects the opening of the DC loop by the receiving terminal. Is not detected, the operation of the automatic transmission means is permitted, and during the first predetermined time,
When a call signal is detected, the operation of the automatic transmission means is prohibited.

According to the second aspect, the transmission control means is configured to execute the control when the line state monitoring means does not detect the start signal of the receiving terminal transmitted from the exchange during the second predetermined time after detecting the polarity inversion. While the operation of the automatic transmission means is permitted, when the activation signal is detected during the second predetermined time, the operation of the automatic transmission means is prohibited. As described above, in the first and second aspects, the communication terminal device determines that the communication terminal device is in the standby state, and waits for a predetermined time even if the communication terminal device can automatically make a call. After confirming that it was not sent, make an automatic call.

According to a third aspect of the present invention, the transmission control means controls the operation of the automatic transmission means when the line state monitoring means detects the opening of the DC loop by the receiving terminal after detecting the transmission source information signal transmitted from the exchange. Ban. That is, when the communication terminal device detects that the receiving terminal has responded to the reception of the transmission source information signal, the communication by the receiving terminal is started, so that the transmission operation is prohibited.

According to a fourth aspect of the present invention, the transmission control means controls the automatic transmission from the time when the line state monitoring means detects the polarity inversion to the time when the line voltage level reaches a predetermined level and detects the end of communication by the receiving terminal. Prohibit the operation of the means. That is, in this communication terminal device, when the communication procedure of the calling telephone number display service starts, the calling operation is prohibited until the communication ends.

According to a fifth aspect of the present invention, in the first aspect, when the predetermined condition is satisfied while the operation of the automatic transmitting means is inhibited, the transmission control means sets the line voltage level to the predetermined level by the line state monitoring means. When a call signal is detected, the automatic transmission means is operated when a calling signal is not detected for a first predetermined time from the transmission request.

Here, the outgoing call request means a point in time when the receiver is picked up in the case of a normal telephone.
The time at which the measurement of the predetermined time is started is started. After the elapse of this time, it is confirmed that the receiving terminal is not communicating, the DC loop is closed, and the automatic transmission operation is started. According to a sixth aspect of the present invention, in the first or second aspect, when the predetermined condition is satisfied while the operation of the automatic transmitting means is prohibited, the line state monitoring means changes the line voltage level to the predetermined level. When it is detected that the call request has been made, a call request is made. From this call request, a call signal is not detected for a first predetermined time, and for a second predetermined time,
When no activation signal is detected, the automatic transmission means is operated.

In this case, since the communication procedure of the calling telephone number display service is not recognized, at least a call signal and an activation signal to the receiving terminal are not transmitted from the exchange when the automatic calling is enabled. After confirming this, start the automatic calling operation. According to a seventh aspect, in the third or fourth aspect, when the predetermined condition is satisfied while the operation of the automatic transmission means is prohibited, the line state monitoring means changes the line voltage level to the predetermined level. That is, when the end of the communication by the receiving terminal is detected, the automatic transmitting means is operated. That is, since this communication terminal device recognizes the communication procedure of the calling telephone number notification service, the automatic calling operation is started when the communication by the receiving terminal ends.

According to claim 8, in any one of claims 1 to 4, the transmission control means opens a DC loop when a predetermined condition is satisfied while the operation of the automatic transmission means is prohibited, and Activate the automatic transmission means. This is a case in which the communication of the receiving terminal is forcibly cut off and automatic transmission is started, and is suitable for an automatic alarm device with high urgency.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an example of the internal configuration of a communication terminal device having an automatic transmission function according to the present invention, and FIG. 2 is a system configuration diagram of a communication system provided with this communication terminal device.

As shown in FIG. 2, the communication terminal device T1 (automatic transmission device) according to the present invention is connected in parallel to the same line L as the ID receiving terminal T2. The ID receiving terminal T2 such as a telephone has a function of a calling telephone number display service, and can receive a source information signal transmitted from the local exchange LS. Here, a facsimile apparatus is illustrated as one of the communication terminal apparatuses T2 having an automatic transmission function, but the present invention is not limited to this, and includes an automatic alarm and a data communication function such as e-mail. Computer or the like.

When the receiving terminal T2 is called from the calling telephone Ta to the exchange LSa via the line La, the exchange LS
In response to this call, the information of the calling telephone Ta is notified to the receiving terminal T2 by the procedure shown in FIG. On the receiving terminal T2 side, based on this information, it is possible to take a corresponding action according to the transmission source. As shown in FIG. 1, the communication terminal device T1 connected in parallel with the receiving terminal T2 is transmission control means of the present invention, and is configured by a CPU or the like. And a communication circuit 2 for performing communication with the line L, a receiving circuit 3 for detecting a calling signal, connecting the line L, etc., a transmitting circuit 4 for closing a DC loop and transmitting a selection signal (dial pulse), A line condition monitoring circuit 5 for monitoring the voltage level and polarity reversal and a signal sent from the exchange LS, and a modem signal detection circuit 6 for detecting a source information signal sent from the exchange LS.

If the communication terminal device T1 is a facsimile device, the communication circuit 2 includes a circuit for executing a facsimile communication procedure and transmitting and receiving image data.
In addition to the configuration shown in the figure, an operation panel including various operation switches and a liquid crystal screen is provided. The line status monitoring means of the present invention comprises a line status monitoring circuit 5 and a modem signal detection circuit 6. The automatic transmission means determines that the control circuit 1 has satisfied a predetermined condition and activates the transmission circuit 4. It is constituted by doing.

Here, the predetermined conditions for performing automatic transmission include, when a facsimile machine is used, when a preset time for automatic transmission is reached, and when the automatic notification device is used, the communication terminal device T1 is used. Security sensor (not shown) connected to
Has detected illegal intrusion. However, as described above, the communication terminal device T1 has the ID receiving terminal T2.
Are connected to the same line L, it is determined that the standby state is established only at the voltage level of the line L, and if the automatic transmission is performed only according to the above predetermined condition, the communication between both the receiving terminal T2 and the communication terminal device T1 May cause problems.

Therefore, the control circuit 1 as the transmission control means
Restricts the automatic transmission operation by the following four methods. FIG. 3 is a time chart showing the line voltage of the line L used in this description.
When the line loop is closed, the voltage level is ± 6 to 10 V. (1) to (9) in FIG.
Correspond to each operation in the sequence diagram of FIG.

In the first method, the line status monitoring circuit 5
After detecting the opening (5) of the DC loop by the receiving terminal,
If the calling signal (6) of the receiving terminal T2 sent from the exchange LS is not detected during the first predetermined time t1 (for example, 0.5 seconds), the automatic calling operation is permitted and the first predetermined time is allowed. When the calling signal (6) is detected during the time t1, the automatic calling operation is prohibited.

In the second method, after the line state monitoring circuit 5 detects the polarity inversion (1), a second predetermined time t2
If the activation signal (2) of the receiving terminal T2 transmitted from the exchange LS is not detected during (for example, 0.3 seconds), the automatic transmission operation is permitted, and during the second predetermined time t2, When the activation signal (2) is detected, the automatic transmission operation is prohibited.

In the communication terminal device T1, the line level monitoring circuit 5 constantly monitors the voltage level of the line L, and when the voltage level at the time of standby (+ 48V or -48V) is reached, it is determined that automatic transmission is possible. However, as shown in the figure, since the receiving terminal T2 may transmit the procedure signal of the calling telephone number display service, the voltage level of the line L becomes the voltage level during standby.
Even when the opening (5) or the polarity reversal (1) of the DC loop is detected, if the procedure signal of the calling telephone number display service is not transmitted from the exchange LS after waiting for the predetermined time t1, t2, the automatic calling is performed. Judge that you can do it.

In a third method, after the modem signal detecting circuit 6 detects the source information signal (4) transmitted as a modem signal from the exchange LS, the control circuit 1 determines in advance the procedure of the calling telephone number display service. Within the set period,
When the opening (5) of the DC loop by the receiving terminal T2 is detected, the automatic transmission operation is prohibited. In the fourth method, after the line state monitoring circuit 5 detects the polarity inversion (1), the line voltage level becomes a predetermined level (+48 V or -48 V), and the communication by the receiving terminal T2 ends (1).
Until 0) is detected, the automatic transmission operation is prohibited.

That is, in the third and fourth methods, the communication procedure (protocol) of the calling telephone number display service is recognized, and in the third method, the receiving terminal T2 transmits the source information signal (4). If it detects that it has received and responded to it,
Since the communication (9) by the receiving terminal T2 is started, the calling operation is prohibited. In the fourth method, when the communication procedure of the calling telephone number display service starts (1), the calling operation is prohibited until the communication ends (10).

Thus, in the communication terminal device T1,
Since the time when automatic transmission can be performed is determined, the receiving terminal T
The transmission operation is not started during the communication of No. 2. Next, a case where a predetermined condition of the automatic transmission is satisfied while the automatic transmission operation is prohibited by the control circuit 1 will be described.
FIG. 4 shows a case in which automatic transmission is started when the communication by the receiving terminal T2 is completed.

When the automatic transmission operation is prohibited by the first or second method, the line state monitoring circuit 5 detects that the voltage level of the line L has reached a predetermined level (+48 V or -48 V). Time (10)
Then, an outgoing call request (11) is made, and if a communication procedure signal of the outgoing telephone number display service is not received for a predetermined time t3 from the outgoing call request (11), automatic outgoing is started.

That is, the predetermined time t3 is set to the same time as the first predetermined time t1, and when the calling signal (6) is not detected during this time, the predetermined time t3 is set to the same time as the second predetermined time t2. When the activation signal (2) is not detected, or the predetermined time t3 is changed to the first predetermined time t
The automatic transmission operation is started when the calling signal (6) and the activation signal (2) are not detected during the same time as the longer time of the first or second predetermined time t2.

In this case, the polarity of the voltage supplied from the exchange LS is not fixed by the terminal, the control circuit 1 does not recognize the communication procedure of the calling telephone number display service, and the line state monitoring circuit 5 performs the polarity inversion. However, since it does not have a function of determining which polarity is being used, that is, a function of determining whether the apparatus is in a standby state or processing a procedure signal, (1) to (3), (5) in FIG. ) To (7), (10) to (1)
The voltage level of the line L shown in 2) is a predetermined level (+
48V or -48V), a calling operation is started (transmission request), and within a predetermined time t3, a call signal (6) and / or a signal from the exchange LS to the receiving terminal T2.
Alternatively, if the activation signal (2) is not detected, it is determined that the apparatus is on standby, and the DC loop is closed (capturing the line) by the transmission circuit 4 (12), and the selection signal is transmitted (13). Then, if the other party responds, the polarity of the line L is inverted (14), and communication can be started (15).

On the other hand, when the automatic transmission operation is prohibited by the third or fourth method, the line state monitoring circuit 5 sets the voltage level of the line L to a predetermined level (+4
8V or -48V), and when the end of communication by the receiving terminal T2 is detected (10), automatic transmission is started. In this case, the control circuit 1 recognizes the communication procedure of the outgoing telephone number notification service by providing the storage means (not shown), so that the automatic transmission starts when the communication by the receiving terminal T2 ends. can do. Therefore, unlike the first and second methods, it is not necessary to provide the predetermined time t3 from the transmission request (11). When the communication by the receiving terminal T2 is completed, the transmission request is made at that time. , You can immediately start the call operation.

Next, a case in which the automatic transmission is forcibly started when the predetermined condition for automatic transmission is satisfied during the communication by the receiving terminal T2 during the communication will be described with reference to FIG. . Here, according to the first method, after the line state monitoring circuit 5 detects the opening (5) of the DC loop by the receiving terminal T2, during the first predetermined time t1,
The figure shows a case where the calling signal (6) of the receiving terminal T2 transmitted from the exchange LS is detected and the automatic transmission operation is prohibited, but the transmission operation by the transmission circuit 4 is forcibly started.

When the predetermined condition for automatic transmission is satisfied, the control circuit 1 opens the DC loop by the transmission circuit 4 (2).
0) Forcibly operate the transmission circuit 4 to start communication (21) to (24). This is suitable for an automatic alarm device or the like with high urgency as compared with a facsimile device or the like with relatively low urgency.

[0037]

As will be understood from the above description, the communication terminal device having the automatic transmission function of the present invention has the following effects. According to claim 1, when the calling signal is detected within a predetermined time after detecting the opening of the DC loop by the receiving terminal, according to claim 2, the activation signal is detected within a predetermined time after detecting the polarity inversion. Is detected, the automatic transmission operation is prohibited. Therefore, the automatic transmission operation of the receiving terminal during communication can be prevented without being aware of the communication procedure of the calling telephone number display service by the receiving terminal. Therefore, the communication on the receiving terminal side is not interrupted.

According to the third aspect, when the opening of the DC loop by the receiving terminal is detected after the source information signal is received from the exchange, the operation of the automatic transmission means is prohibited. The operation of the automatic calling means is prohibited from the start of the communication of the calling telephone number display service to the end of the communication by the receiving terminal due to the inversion of. Therefore, there is no case where automatic calling is started during communication by the calling terminal number display service by the receiving terminal,
Communication on the receiving terminal side is not interrupted.

According to the fifth and sixth aspects, when the conditions for automatic transmission are satisfied while the automatic transmission is prohibited, the voltage level of the line becomes a predetermined level, and the transmission from the exchange for a predetermined time. After confirming that the procedure signal of the telephone number display service is not transmitted, the automatic calling operation is started. Therefore, even if the above procedure is not recognized, the calling operation is started during communication by the receiving terminal. Nothing.

According to claim 7, while the automatic transmission is prohibited,
When the condition for automatic transmission is satisfied, the transmission operation can be started immediately after the voltage level of the line becomes a predetermined level and the communication by the receiving terminal ends. According to the eighth aspect, even when the automatic transmission is prohibited, the automatic transmission can be forcibly started when the condition for the automatic transmission is satisfied. Therefore, the present invention is applied even when the communication terminal device is a highly urgent automatic alarm device, and the communication of the receiving terminal can be interrupted to start the communication.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of an internal configuration of a communication terminal device having an automatic calling function according to the present invention.

FIG. 2 is a schematic configuration diagram of a communication system including the communication terminal device shown in FIG.

FIG. 3 is a time chart showing a change in line voltage of a line (claims 1 to 4).

FIG. 4 is a time chart showing a change in line voltage of a line (claims 5 to 7).

FIG. 5 is a time chart showing a change in line voltage of a line (claim 8).

FIG. 6 is a sequence diagram showing a basic operation of a calling telephone number display service.

[Explanation of symbols]

 T1: Communication terminal device having an automatic transmission function 1 ... Control circuit 4 ... Transmission circuit 5 ... Line status monitoring circuit 6 ... Modem signal detection circuit T2 ... ID reception terminal L, La: Line LS, LSa: Subscriber line exchange

Claims (8)

[Claims] 1. A communication terminal device comprising a receiving terminal having a function of receiving a source information signal sent from an exchange, connected in parallel to the same line, comprising: A line state monitoring means for monitoring a signal to be transmitted; an automatic transmission means for automatically closing a DC loop and transmitting a selection signal when a predetermined condition is satisfied; and During the first predetermined time after detecting the opening of the DC loop by the receiving terminal, when the calling signal of the receiving terminal transmitted from the exchange is not detected, the operation of the automatic transmission means is permitted. A communication terminal device having an automatic transmission function, comprising: transmission control means for inhibiting the operation of the automatic transmission means when the call signal is detected during the first predetermined time. 2. The transmission control means according to claim 1, wherein said transmission control means transmits an activation signal of said reception terminal transmitted from an exchange during a second predetermined time after said line state monitoring means detects polarity inversion. When the detection is not detected, the operation of the automatic transmission means is permitted, and when the start signal is detected during the second predetermined time, the operation of the automatic transmission means is prohibited. A communication terminal device having a calling function. 3. The transmission control means according to claim 1, wherein the transmission control means detects the opening of the DC loop by the receiving terminal after the line state monitoring means detects the transmission source information signal transmitted from the exchange. A communication terminal device having an automatic transmission function, wherein operation of an automatic transmission means is prohibited. 4. The transmission control means according to claim 1, wherein the line state monitoring means detects a polarity inversion, and then detects the end of communication by the receiving terminal when the line voltage level becomes a predetermined level. Until the above, a communication terminal device having an automatic transmission function, wherein the operation of the automatic transmission means is prohibited. 5. The transmission control means according to claim 1, wherein, when the predetermined condition is satisfied while the operation of the automatic transmission means is prohibited, the line state monitoring means sets the line voltage level to a predetermined level. When it is detected that the level has reached the level, a transmission request is made. When the call signal is not detected for the first predetermined time from the transmission request, the automatic transmission means is operated. A communication terminal device having an automatic calling function. 6. The transmission control means according to claim 1, wherein said transmission control means, when prohibiting the operation of said automatic transmission means, satisfies said predetermined condition, causes said line state monitoring means to reduce the line voltage level. When it is detected that the level has reached the predetermined level, a call request is made. From the call request, the call signal is not detected for the first predetermined time and the call signal is not detected for the second predetermined time. A communication terminal device having an automatic transmission function, wherein the automatic transmission means is operated when the activation signal is not detected. 7. The transmission control means according to claim 3, wherein said transmission control means, when prohibiting the operation of said automatic transmission means, satisfies said predetermined condition, causes said line state monitoring means to reduce the line voltage level. When it reaches a predetermined level and detects the end of communication by the receiving terminal,
A communication terminal device having an automatic transmission function, wherein the communication terminal device operates the automatic transmission means. 8. The transmission control means according to claim 1, wherein the transmission control means opens a DC loop when the predetermined condition is satisfied while the operation of the automatic transmission means is prohibited. A communication terminal device having an automatic transmission function, wherein the communication terminal device operates the automatic transmission means.