JPH0715495A - Automatic changeover device for line classification of telephone set - Google Patents

Abstract

PURPOSE:To simplify the circuit configuration by using a selection signal corresponding to a stored line classification so as to make dialing and at the time of disabled connection making dialing with the selection signal of another line classification so as to eliminate the need for a detection circuit for a line state. CONSTITUTION:A DP signal generator 21 connecting to a telephone line 1 via a line monitor 2 and a DC circuit controller 3 sends a DP signal being selection signal of the telephone number of the other party based on a control signal from an MPU10 to the telephone line 1, while a PB signal generator 22 sends a PB signal of the telephone number of the other party. Then dialing is made by using a selection signal of a line classification of 1st preferential order stored in a RAM12 and if a CED signal from a destination facsimile equipment cannot be received, the selection signal of the other line classification is revised for dialing according to the prescribed preferential order. When the CED signal of 2100Hz is received from the destination facsimile equipment, the line classification is overwritten in the RAM12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone line line type automatic switching device provided in a telephone line terminal device.

[0002]

2. Description of the Related Art At present, there are the following three types of telephone lines. (1) Dial pulse signal (hereinafter referred to as DP signal)
20 pulse per second (hereinafter, abbreviated as 20 pps) system (2) DP signal 10 pulse per second (hereinafter, abbreviated as 10 pps) system (3) Push button signal (hereinafter, referred to as PB signal) system (the PB signal is the same) It is called a DTMF signal from the system.)

Even if the PB signal selection signal is sent to the DP signal type telephone line, it is not accepted by the exchange connected to the telephone line, and on the other hand, the DP signal is transmitted to the PB signal type telephone line. Even if the signal selection signal is sent, it cannot be accepted by the exchange. Therefore, it is necessary for the terminal device connected to the telephone line to dial with a selection signal adapted to the line type system of the telephone line. Therefore, in the conventional terminal device, a line type, that is, a selection signal changeover switch is provided to switch the selection signal system or set in a memory of a microprocessor device (hereinafter referred to as MPU) incorporated in the terminal device. The type was changed and the line type was switched.

[0004]

When the terminal device is first installed and connected to the telephone line, it is necessary to set the type of the selection signal, and when the line type of the telephone line is changed, the selection signal of the selection signal is changed. It is necessary to reset the type. However, if the person who is not the person in charge of the electrical installation work at the time of first installation, the user often forgets the setting although it is described in the instruction manual. In such a case, the call from the terminal device cannot be normally made, and the invalid call is repeated.

In order to solve these problems, a device for detecting the line type of a telephone line is disclosed in JP-A-61-2155.
No. 3 and Japanese Patent Laid-Open No. 63-40432.

The device disclosed in the former publication (hereinafter referred to as the first conventional device) is a control circuit in an automatic dialing device which is stored in a memory and is configured to automatically dial a telephone number. Is a control of the pulse dial transmission circuit or tone dial transmission circuit, after the first telephone number is transmitted by pulse or tone dial, the state of the telephone line is detected by the silence state detection circuit, and if the telephone line is in the silence state, It is characterized in that the remaining telephone numbers are continuously dialed, and when not in a silent state, the telephone line is disconnected once and then dialed by another method.

The device disclosed in the latter publication (hereinafter referred to as the second conventional device) is based on the destination telephone number stored when the automatic transmission command is received.
A dial tone detecting means for detecting a dial tone sent from a telephone line in an automatic dialing device for automatically making a call, and a dial for transmitting a dial signal matching the rotary dial type and push button dial type to the telephone line. Based on the information detected by the numeral sending means and the dial tone detecting means, it is determined which type of telephone line is used, and the dial numeral sending means is matched with the rotary dial type or push button dial type. It is characterized by comprising an automatic dial control means for controlling so as to send a dial signal.

However, in the conventional device, it is necessary to provide a detection circuit for detecting the line state such as a silence state detection circuit or dial tone detection means, which causes a problem that the circuit becomes complicated.

An object of the present invention is to solve the above problems and to eliminate the need to provide a detection circuit for detecting the line status, and to provide an automatic line type switching device for telephone lines having a simpler circuit structure than the conventional device. To provide.

[0010]

According to a first aspect of the present invention, there is provided an automatic line type switching device for a telephone line, comprising first signal generating means for generating a dial pulse signal as a selection signal of a telephone number of the other party. Second signal generating means for generating a selection signal of the other party's telephone number by a push button signal, storage means for storing the line type of the telephone line, and connection detection for detecting whether or not the other party's terminal device is connected to the line. Means for generating a signal for selecting the telephone number of the other party corresponding to the line type stored in the storage means when making a call to the terminal device of the other party via the telephone line. Generated by the means and sent to the telephone line for dialing, and when the connection detecting means detects that the line is not connected to the terminal device of the other party, the storing means Control means for generating a selection signal of a telephone number of the other party corresponding to a line type different from the stored line type by the first or second signal generating means and sending the signal to the telephone line for dialing. It is characterized by having.

The telephone line line type automatic switching device according to a second aspect is the telephone line line type automatic switching device according to the first aspect, wherein the control means uses the connection detecting means to connect the terminal device of the other party. When the line connection is not established, the selection signal of the telephone number of the other party corresponding to the line type different from the line type stored in the storage means is generated by the first or second signal generating means. When the connection detecting means detects that a line connection is established with the terminal device of the other party, the other line type is stored in the storage means as the line type of the telephone line. It is characterized by storing.

Further, in the automatic telephone line type switching device according to claim 3, in the telephone line automatic type switching device according to claim 1, the control means uses the connection detection means to connect the terminal device of the other party. When the line connection is not established, the selection signal of the telephone number of the other party corresponding to the line type different from the line type stored in the storage means is transmitted in accordance with the priority setting order of the predetermined line type.
Alternatively, it is generated by the second signal generating means and sent to the telephone line for dialing.

According to a fourth aspect of the present invention, there is provided a telephone line automatic line type switching apparatus according to the first to third aspects, wherein the connection detecting means transmits from the other party's terminal device. It is characterized by detecting whether or not the line connection is established with the terminal device of the other party based on the predetermined signal.

Further, the automatic line type switching device for a telephone line according to claim 5 is the automatic line type switching device for a telephone line according to any one of claims 1 to 3, wherein the connection detecting means is a DC loop voltage of the telephone line. It is characterized by detecting whether or not the line connection is established with the terminal device of the other party.

[0015]

According to another aspect of the present invention, in the automatic line type switching device for a telephone line, the control means stores the line stored in the storage means when making a call to the other terminal device via the telephone line. A signal for selecting the telephone number of the other party corresponding to the type is generated by the first or second signal generating means and sent to the telephone line to perform dialing, and the connection detecting means connects with the terminal device of the other party. When it is detected that the connection is not established, the selection signal of the telephone number of the other party corresponding to the line type different from the line type stored in the storage means is generated by the first or second signal generating means. Then, the data is sent to the telephone line and dialed.

According to another aspect of the present invention, in the telephone line automatic line type switching device, the control means stores in the storage means when the connection detecting means does not establish a line connection with the other terminal device. The selection signal of the telephone number of the other party corresponding to a line type different from the established line type is generated by the first or second signal generating means and transmitted to the telephone line for dialing, and the connection detecting means. When it is detected that the line is connected to the terminal device of the other party, the other line type is stored in the storage means as the line type of the telephone line.

Further, in the automatic line type switching device for a telephone line according to a third aspect of the present invention, the control means sets a predetermined line type when the connection detecting means does not make a line connection with the other terminal device. According to the priority setting order, the selection signal of the telephone number of the other party corresponding to a line type different from the line type stored in the storage means is given as the first signal.
Alternatively, it is generated by the second signal generating means and transmitted to the telephone line for dialing.

In the automatic line type switching device for a telephone line according to a fourth aspect of the present invention, preferably, the connection detecting means is based on a predetermined signal transmitted from the terminal device of the other party. It is detected whether or not the line has been connected.

Further, in the automatic line type switching device for a telephone line according to the present invention, the connection detecting means comprises:
Preferably, it is detected based on the DC loop voltage of the telephone line whether or not the line is connected to the terminal device of the other party.

[0020]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a facsimile apparatus equipped with an automatic dialing apparatus according to an embodiment of the present invention. In the automatic dialing device of this embodiment, first, R
The telephone number of the other party is dialed by the line type selection signal of the first priority stored in the AM 12, and if the CED signal of 2100 Hz from the other party's facsimile machine cannot be received, the predetermined priority is given. If the CED signal of 2100 Hz from the destination facsimile machine can be received by dialing with the changed selection signal of the line type according to the order and dialing with the changed selection signal of the line type, A feature is that the line type is overwritten and stored in the RAM 12.

In FIG. 1, a line monitor 2 is connected to a telephone line 1 connected to an exchange of a type 1 telecommunications carrier,
A facsimile modulator / demodulator (hereinafter referred to as modulator / demodulator) 4 is connected via a DC circuit controller 3. Here, the line monitor 2 detects the DC loop voltage of the telephone line 1 to detect whether the telephone line 1 is in use or not, and whether or not the telephone line 1 is connected to the facsimile machine of the other party. The DC circuit controller 3 closes the DC loop of the telephone line 1 when it is off-hook, and opens the DC loop of the telephone line 1 when it is on-hook. Further, the modulator / demodulator 4 performs known processing such as transmission / reception and detection of a control signal of a facsimile device such as a CED signal, and modulation / demodulation of image data.

Further, a DP signal generator 21 and a PB are connected to the telephone line 1 via a line monitor 2 and a DC circuit controller 3.
The signal generator 22 is connected. DP signal generator 21
Is a selection signal of the telephone number of the other party to be dialed based on a control signal from the MPU 10 described later.
While the DP signal of pps or 20 pps is transmitted to the telephone line 1, the PB signal generator 22 is a PB which is a selection signal of the telephone number of the other party based on the control signal from the MPU 10.
The signal is sent to the telephone line 1.

The MPU 10, which is a control circuit for controlling the operation of the facsimile apparatus, has a ROM 11 in which a system program indicating the control operation of the MPU 10 is stored, and the stored contents are backed up by a battery 12B as a work area of the MPU 10. A RAM 12 that is used and stores the line type of the telephone line 1 is connected, and a telephone numeric keypad 13 including "0" to "9" and "*", "#" for inputting a telephone number is provided. Connected. In addition, the MPU 10 has 20
A first line type setting key (not shown) for selectively setting the type of one selection signal of the first priority among the DP signal of pps, the DP signal of 10 pps, and the PB signal to set the line type. ), And a second line type setting key (not shown) for selectively setting a method of two selection signals of a second priority different from the method of one selection signal of the first priority. And a keyboard 14 including a transmission key (not shown) for instructing to read the document image and transmit the image data. When any of the selection signal methods is selected using the line type setting key, R
The content of the line type of AM12 is changed.

In this embodiment, when the apparatus is shipped from the factory, the DP signal of 20 pps is set in the RAM 12 as the line type of the first priority, and when the next line type is changed (see step S12 described later). ), The PB signal of the second priority is selected, and the DP signal of 10 pps of the third priority is selected when the line type is changed next time (see step S22 described later). The line type priority is set. This priority can be changed using the first and second line type setting keys of the keyboard 14. After the factory shipment, as will be described later in detail, if the PB signal is set as the first priority line type, the DP signal of 20 pps is set as the second priority line type, while When a DP signal of 10 pps is set as the first priority line type, 20 pps as the second priority line type
DP signal is set. That is, in this embodiment, a DP signal of 20 pps → PB signal → D of 10 pps.
The priority setting order of the P signal is preset. The priority setting order is not limited to this, and may be changed. Further, it is preferable that the priority setting order is set in the order from the highest usage rate to the lowest usage rate of a general line type in a telephone line terminal device.

2 and 3 are flow charts showing the automatic dialing process executed by the facsimile apparatus of FIG. When the operator sets the original image on the reading unit and then inputs the other party's telephone number (also referred to as a facsimile number in the case of a facsimile device) using the ten keys 13 and presses the transmission key, the MPU 10 performs the transmission process. First, the line monitor 2 is used to detect whether or not the telephone line 1 is in use, and when it is not in use, the automatic dialing process shown in FIGS. 2 and 3 is executed. In the following description, for convenience of explanation, it is assumed that the priority of the line type is set at the time of factory shipment.

In the automatic dialing process, first, in step S1, the parameter N indicating the number of times of dialing is reset to zero. Then, step S2
In the above, after closing the DC loop of the telephone line 1 by using the DC circuit controller 3 and off-hooking, the inputted selection signal of the other party's telephone number is sent as the first priority of 20 pps.
The DP signal is used to dial. 2100Hz from the other party's facsimile machine after the dialing
The CED signal of is waited for a predetermined time of, for example, 45 seconds. C
When the ED signal is detected by the modulator / demodulator 4 (YES in step S3), the automatic dialing process ends and the process proceeds to the transmission procedure of the predetermined facsimile device. on the other hand,
When the CED signal cannot be received (NO in step S3), the parameter N is incremented by 1 in step 4, and then the parameter N is set to the predetermined threshold value Nth (Nt in the present embodiment) in step 5.
h is preferably 3. ) It is determined whether or not the following. When the parameter N is equal to or less than the threshold value Nth (YES in step S5), the DC circuit controller 3 is used to open the DC loop of the telephone line 1 and on-hook in step S6, and then the process returns to step S2, and from step S2. Parameter N is a predetermined threshold value Nt
Repeat until h is exceeded. On the other hand, when the parameter N exceeds the threshold value Nth (NO in step S5),
In step S7, the DC circuit controller 3 is used to open the DC loop of the telephone line 1 for on-hook, and then the process proceeds to step S11.

Next, in step S11, the parameter N indicating the number of times of dialing is reset to zero. Then, in step S12, the DC circuit controller 3 is used to close the DC loop of the telephone line 1 and off-hook, and then the input signal of the other party's telephone number is changed to the first priority by changing the line type. Second, different from the ranking system
The PB signal of the priority order is generated and dialing is performed. After the dialing, 2 from the facsimile machine of the other party
A 100 Hz CED signal is waited for a predetermined time of, for example, 45 seconds. When the CED signal is detected by the modulator / demodulator 4 (YES in step S13), it is determined in step S18 that the PB signal matches the line type of the telephone line 1, and PB is set as the line type of the first priority. After the signal is stored in the RAM 12 and the DP signal of 20 pps as the second priority line type is stored in the RAM 12, the automatic dialing process is finished and the predetermined facsimile machine transmits the procedure. On the other hand, when the CED signal cannot be received (N in step S13)
O), after incrementing the parameter N by 1 in step 14, the parameter N is incremented in step 15.
Is determined to be equal to or less than a predetermined threshold value Nth. When the parameter N is equal to or less than the threshold value Nth (YES in step S15), the DC circuit controller 3 is used to open the DC loop of the telephone line 1 to be on-hook in step S16, and then the process returns to step S12, and from step S12. The above process is repeated until the parameter N exceeds the predetermined threshold value Nth. On the other hand, when the parameter N exceeds the threshold value Nth (N in step S15)
O), after opening the DC loop of the telephone line 1 by using the DC circuit controller 3 in step S17 and on-hooking,
It proceeds to step S21.

Further, in step S21, the parameter N indicating the number of times of dialing is reset to 0. Then, in step S22, the DC circuit controller 3 is used to close the DC loop of the telephone line 1 and the telephone line is off-hooked. Then, the input signal of the other party's telephone number is changed to the first or the first by changing the line type. A DP signal of 10 pps having a third priority different from the method of the second priority is generated and dialed. After the dialing, a CED signal of 2100 Hz is sent from the facsimile machine of the other party to, for example, 4
Wait for a predetermined time of 5 seconds. When the CED signal is detected by the modulator / demodulator 4 (YES in step S23), it is determined in step S28 that the PB signal matches the line type of the telephone line 1, and the line type of the first priority is 10 pps. And the DP signal of 20 pp as the line type of the second priority.
After storing the DP signal of s in the RAM 12, the automatic dialing process ends and the transmission procedure of a predetermined facsimile device starts. On the other hand, when the CED signal cannot be received (NO in step S23), the parameter N is incremented by 1 in step 24, and then the parameter N is set to the predetermined threshold value Nth in step 25.
It is determined whether or not the following. When the parameter N is equal to or less than the threshold value Nth (YES in step S25)
S), after opening the DC loop of the telephone line 1 by using the DC circuit controller 3 in step S26 and on-hooking,
Returning to step S22, the processing from step S22 is repeated until the parameter N exceeds the predetermined threshold value Nth. On the other hand, when the parameter N exceeds the threshold value Nth (NO in step S25), the DC circuit controller 3 is used to open the DC loop of the telephone line 1 to be on-hook in step S27, and then the process proceeds to step S22.

As described above, the automatic dialing device of this embodiment has the following unique advantages. (1) Since it is not necessary to provide a detection circuit for detecting a line state such as a silence state detection circuit or dial tone detection means, it can be configured with a simple circuit as compared with a conventional device, and the manufacturing cost of the device. Can be reduced. (2) Normally, the line type of a telephone line is not frequently changed. Therefore, by storing the line type that has been set once in the RAM 12, it is not necessary to check the line for each dialing, and the line can be changed from the call origination. The time to connect can be shortened. (3) When a different line type is set when a line connection cannot be established, an incorrect line type can be set by setting the priority setting order from the one with the highest usage rate of the general line type to the one with the lowest usage rate. It is possible to minimize the transmission of the selection signal in, and it is possible to shorten the time from transmission to line connection.

In the above embodiments, the facsimile machine provided with the automatic dialing device is described.
The present invention is not limited to this, and can be widely applied to telephone line terminal devices such as ordinary telephones and modems.

In the above embodiment, step S3.
In S13 and S23, the CED of the facsimile device
The signal is used to determine whether or not the facsimile machine of the other party is connected, but the present invention is not limited to this, and another low frequency signal within the band of the telephone line may be used. Alternatively, the line monitor 2 may be used to monitor the DC loop voltage of the telephone line 1 to determine whether or not the line connection is established with the terminal device of the other party.

In the above embodiment, the selection signal is generated by the telephone number input using the ten-key pad 13.
The present invention is not limited to this, and when the telephone number is registered in correspondence with the speed key and the speed key is pressed, the selection signal may be generated by the corresponding phone number, or in response to the one-touch dial key. When the telephone number is registered and the one-touch dial key is pressed, the selection signal may be generated by the corresponding telephone number.

[0034]

As described in detail above, according to the present invention, when a call is made to the terminal device of the other party via the telephone line, the selection signal of the telephone number of the other party corresponding to the line type stored in the storage device. Is generated and sent to the telephone line to perform dialing, and when it is detected that the line connection with the other party's terminal device is not made, a line type different from the line type stored in the storage device is detected. Since a selection signal of the other party's telephone number corresponding to is generated and sent to the above telephone line for dialing, it is necessary to provide a detection circuit for detecting the line state such as a silence state detection circuit or dial tone detection means. Therefore, the circuit can be configured with a simple circuit as compared with the conventional device, and the manufacturing cost of the device can be reduced.

Further, since the line type of the telephone line is usually not changed frequently, it is not necessary to check the line for each dialing by storing the line type once set in the storage means. The time from making a call to connecting the line can be shortened.

Further, when another line type is set when the line cannot be connected, the priority setting order is set in the order from the highest usage rate of the general line type to the lowest usage rate. It is possible to minimize the transmission of the selection signal for each line type, and to shorten the time from transmission to line connection.

[Brief description of drawings]

FIG. 1 is a block diagram of a facsimile device including an automatic dialing device according to an embodiment of the present invention.

FIG. 2 is a first part of a flowchart showing an automatic dialing process executed by the facsimile apparatus of FIG.

FIG. 3 is a second part of a flowchart showing an automatic dialing process executed by the facsimile apparatus of FIG.

[Explanation of symbols]

 1 ... Telephone line, 2 ... Line monitor, 3 ... DC circuit controller, 4 ... Facsimile modulator / demodulator, 10 ... MPU, 11 ... ROM, 12 ... RAM, 13 ... Telephone numeric keypad, 14 ... Keyboard, 21 ... DP signal generation 22 ... PB signal generator.

Claims (5)

[Claims] 1. A first signal generating means for generating a selection signal of a telephone number of the other party by a dial pulse signal, a second signal generating means for generating a selection signal of the other party's telephone number by a push button signal, and a telephone. Storage means for storing the line type of the line, connection detection means for detecting whether or not the line is connected to the terminal device of the other party, and the above-mentioned memory when making a call to the terminal device of the other party via the telephone line. The selection signal of the telephone number of the other party corresponding to the line type stored in the means is generated by the first or second signal generating means and sent to the telephone line for dialing, and the connection detecting means is used to perform the dialing. When it is detected that the line is not connected to the terminal device of the other party, the selection signal of the telephone number of the other party corresponding to the line type different from the line type stored in the storage means is displayed. First
An automatic line type switching device for a telephone line, further comprising: a control unit for generating a second signal and transmitting it to the telephone line for dialing. 2. The telephone of the other party corresponding to a line type different from the line type stored in said storage means when said connection detecting means does not establish a line connection with said terminal device of the other party. A number selection signal is generated by the first or second signal generating means and transmitted to the telephone line for dialing, and it is detected by the connection detecting means that the line connection is established with the terminal device of the other party. In this case, the other line type is stored in the storage means as the line type of the telephone line, and the automatic line type switching device for the telephone line according to claim 1. 3. The line type stored in the storage unit in accordance with the priority setting order of a predetermined line type when the connection detecting unit has not made a line connection with the terminal device of the other party. 2. The telephone according to claim 1, wherein a selection signal of a telephone number of the other party corresponding to another line type is generated by the first or second signal generating means and sent to the telephone line for dialing. Automatic line type switching device. 4. The connection detecting means detects whether or not a line connection has been established with the terminal device of the other party, based on a predetermined signal transmitted from the terminal device of the other party. Automatic telephone line type switching device described in 3. 5. The telephone line according to claim 1, wherein the connection detecting means detects, based on the DC loop voltage of the telephone line, whether or not the line is connected to the terminal device of the other party. Automatic line type switching device.