JPH0328105B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to an automatic telephone calling device, and in particular, by turning on a switch, an activation signal for calling a specific called party is sent, and the calling device is activated. The present invention relates to an automatic telephone calling device that sends a response message to a called party in response to the called party's response to the call.

(Prior Art) As a conventional telephone automatic calling device of this type, there is one used, for example, as a part of a telephone transfer device used in a general subscriber telephone line. In this conventional telephone automatic calling device, by turning on a switch, an activation signal for calling a preset called party is transmitted.
In this case, when the called party answers the call,
The calling party's telephone line is current converted. and,
This automatic telephone calling device sends a response message to the called party by detecting that the telephone line has been converted into a current.

(Problem to be Solved by the Invention) However, in such a conventional automatic telephone calling device, when it is used, for example, on a so-called toll-free telephone service telephone line in which the caller pays for the telephone call, the call of the issued activation signal is Even if the called party answers, it cannot be detected that the called party has answered because the calling party's telephone line is not converted to current. Therefore, with conventional automatic telephone calling devices,
If it is used on a toll-free service telephone line, even if the called party answers the call, it will not be possible to send a message.

In this way, conventional automatic telephone calling devices cannot operate normally on telephone lines where the calling party's telephone line is not converted to current by the called party's response, such as toll-free service telephone lines. I can't.

Therefore, a primary object of the present invention is to provide a telephone line in which the calling party's telephone line is not transformed by the called party's response, such as, for example, toll-free service telephone lines and telephone lines of telephone forwarding equipment. However, it is an object of the present invention to provide an automatic telephone calling device that can operate normally even when the caller is using the telephone automatically.

(Means for Solving the Problems) The present invention is connected to a telephone line and transmits an activation signal for calling a specific called party by turning on a switch on the calling party's telephone. A start signal transmitting means, a start signal end detecting means for detecting that the start signal transmitting means has finished transmitting the start signal, and a start signal end detecting means that the start signal is terminated. an outgoing message sending means for sending an outgoing message to the telephone of the calling party in response to the detection of the caller's telephone; and a calling party connected to a telephone line and called by the activation signal sending means. a ringing completion detection means for detecting that the ringing tone of the called party has disappeared; and a response message transmission means for transmitting a response message to a called party.

(Operation) By turning on the switch of the caller's telephone, the activation signal transmitting means transmits an activation signal for calling a specific called party. The ringing completion detecting means detects whether or not the ringing tone of the called party called by the activation signal transmitting means has disappeared. In response to detecting that there is no ringing tone, a response message is transmitted to the called party by the response message transmitting means.

(Effects of the Invention) According to the present invention, by detecting that the called party's ring tone has disappeared, it is determined that the called party has answered. It is possible to operate normally even in a telephone line such as a toll-free service telephone line, where the calling party's telephone line is not converted in current depending on the called party's response.

The above objects, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

(Embodiment) FIG. 1 is a circuit diagram showing an embodiment of the present invention. The automatic telephone calling device according to the embodiment of the present invention is capable of calling a caller in response to a caller's answer, such as a so-called toll-free service telephone line where the telephone charge is paid by the callee and a telephone line of a telephone transfer device. In advance, the telephone line at the calling party can be used for a telephone line that is not converted to current, or for a telephone line that is converted for current in response to the called party answering, such as a general subscriber telephone line. Let me point this out. In the detailed description of this embodiment, an example will be explained in which the automatic telephone calling device 10 of this embodiment is connected to so-called toll-free service telephone lines 12a and 12b.

The automatic telephone calling device 10 of this embodiment has two telephones 14 and 16 connected, and by turning on the switch 18 or 20 of one telephone, the connection of the other telephone 16 or 14 is cut off. It includes a switching circuit 22.

This switching circuit 22 includes two telephone switching relays 24 and 26. One telephone line 12a is connected to one input/output end of the telephone 14 via one b contact 24a of one telephone switching relay 24. Further, the other telephone line 12b is connected to another b contact 2 of the relay 24.
4b to relay 2 for switching the other telephone.
The other end of the excitation coil of this relay 26 is connected to the other input/output end of the telephone 14. Therefore, by turning on relay 24, telephone 14 can be disconnected from telephone lines 12a and 12b.
Further, relay 26 is turned on by turning on switch 18 of telephone 14.

Note that a commonly used telephone can be used as the telephone 14.

Furthermore, this telephone line 12a is connected to the open side terminal of one c contact 28a of a relay 28, which will be described later. The common side terminal of the c contact 28a of this relay 28 is connected to one b contact 26a of the relay 26.
It is connected to one input/output end of the telephone 16 via the terminal. This telephone 16 is a telephone exclusively used for automatic calling, and a commonly used telephone can be used. The other telephone line 12b is connected to the open side terminal of another c contact 28b of the relay 28 via the excitation coil of the relay 30 for holding the relay 28. And this relay 28 c
The common side terminal of the contact 28b is connected to another b of the relay 26.
It is connected to the other input/output end of the telephone 16 via the contact 26b. Therefore, by turning on relay 28, telephone 16 is connected to telephone line 12a.
and 12b, relay 26
By turning on the telephone 16, the telephone 16 can be disconnected from the telephone lines 12a and 12b.

Further, the closing side terminal of the c-contact 28a of the relay 28 is grounded, and the c-contact 28b of the relay 28 is also grounded.
The closing side terminal of is a relay 3 for starting an automatic transmission circuit 32 that constitutes a part of the activation signal transmission means.
It is connected to the power supply +V via the No. 4 excitation coil. Therefore, the switch 2 of the telephone 16
By turning on 0, relay 34 can be turned on. Further, a capacitor 36 is connected in parallel to the excitation coil of the relay 34 in order to delay the return time of the relay 34.

One end of the excitation coil of the relay 24 is grounded via the a contact 34a of the relay 34. The other end of the excitation coil of the relay 24 is connected to the power supply +V. Therefore, turning on relay 34 turns on relay 24. In addition, the relay 28 is connected to the a contact 34a of the relay 34.
A contacts 28c are connected in parallel. Therefore,
Turning on switch 20 of telephone 16 turns on relays 34 and 24, thereby connecting telephone 14 to telephone lines 12a and 12.
It can be separated from b.

Automatic calling circuit 32 includes an activation signal emitter 38 that generates an activation signal for calling a particular called party. This activation signal transmitter 38 is, for example,
It includes a memory element such as ROM, and this ROM has
Data corresponding to an activation signal for calling a particular called party is stored. In addition, in this embodiment, the data corresponding to the activation signal for using the so-called toll-free service telephone line is
Stored in ROM.

The power input terminal of this activation signal transmitter 38 is connected to a power supply +V via one a contact 40a of a relay 40. One end of the excitation coil of this relay 40 is connected to the power supply +V, and the other end of this excitation coil is grounded via another a contact 34b of the relay 34 described above. Therefore, by turning on relay 34, relay 40 is turned on, thereby turning on activation signal emitter 38.
is activated.

Further, an input end of a matching transformer 42 is connected to an output end of the activation signal transmitter 38. This matching transformer 42 is connected to the starting signal transmitter 38.
This is for matching the impedance of the telephone lines 12a and 12b. One output end of the matching transformer 42 is connected to one end of one a contact 43a of a relay 43 built in the start signal transmitter 38, and this a contact 43a
The other end of the relay 28 is connected to one telephone line 12a via another b contact 28c. Further, the other output end of the matching transformer 42 is connected to the other telephone line 12b via another b contact 28d of the relay 28. In addition,
A switch 44 is connected between the output ends of the matching transformer 42 for switching between transmitting a starting signal for a rotary telephone and transmitting a starting signal for a push-button telephone.

The aforementioned relay 43 is controlled by a control circuit 45 built into the activation signal transmitter 38. Then, when making a call to the activation signal of the Pushu type telephone,
The switch 44 is turned off and the relay 40 is turned on. Accordingly, relay 43 is turned on by control circuit 45, and a push-button telephone activation signal for calling a specific called party is transmitted from activation signal transmitter 38 to telephone lines 12a and 12b.

Furthermore, a start signal end detection circuit 46 is connected to the start signal transmitter 38 as a start signal end detection means for detecting the end of the start signal transmission. This activation signal end detection circuit 46 is
When the activation signal transmitter 38 finishes transmitting the activation signal, its output terminal becomes low level.

At the output terminal of this starting signal end detection circuit 46,
The input terminal of the timer circuit 48 is connected. This timer circuit 48 includes, for example, a time limit relay 50, and when its input terminal becomes low level, its output terminal becomes low level for a certain period of time, for example, 3 seconds in this embodiment.

A relay 52 is connected to the output end of this timer circuit 48.
One end of the excitation coil is connected to the excitation coil, and the other end of this excitation coil is connected to the power supply +V.

Further, the input end of a transmission message circuit 54 serving as transmission message transmission means is grounded via one a contact 52a of this relay 52. Further, the output terminal of this transmitting message circuit 54 is connected to the relay 2 via another a contact 52b of the relay 52.
It is connected to the common side terminal of the c-contact 28a of No. 8. Further, the common side terminal of the C contact 28b of the relay 28 is grounded via the other A contact 52c of the relay 52. Note that the c contacts 28a and 28 of the relay 28
The common side terminals of the terminals b are connected to the telephone set 16 via the b contacts 26a and 26b of the relay 26, respectively.

Therefore, by turning on the relay 52, the outgoing message circuit 54 can be activated, and the outgoing message circuit 54 can send an outgoing message such as "You are ringing" to the telephone set 16. can. Note that the outgoing message circuit 54 includes a memory element such as a PROM, and the outgoing message is, for example,
It is stored in PROM etc. Also, this
PROM is a type of ROM that can be erased and rewritten using ultraviolet light or high voltage.
Therefore, it is also possible to rewrite the contents of the message.

On the other hand, one end of an excitation coil of a relay 58 for activating the ringing sound detection circuit 56 is connected to the output end of the activation signal end detection circuit 46, and the other end of this excitation coil is connected to the power supply +V. This ringing detection circuit 56 is for detecting a ringing tone, and when a signal such as a ringing tone is input to its input terminal, its output terminal goes to a low level in synchronization with the ringing tone. becomes.

The input terminal of this ringing detection circuit 56 is
connected to the output end of the automatic transmission circuit 32 via two a contacts 58a and 58b of the relay 58;
Furthermore, the two b contacts 28c and 2 of the relay 28
8d to telephone lines 12a and 12b, respectively.

The output end of the calling signal detection circuit 56 is connected to one end of the excitation coil of the relay 60, and the other end of the excitation coil is connected to the power supply +V. The a contact 60a of this relay 60 is connected to the a contact 60a of the relay 62.
The contacts 62a are connected in parallel, and one end of these contacts is connected to the power supply +V via the excitation coil of the relay 62. On the other hand, contacts 60a and 62
The other end of a is another a contact 3 of the relay 34 mentioned above.
It is grounded via 4c. Therefore, once relay 60 is turned on while relay 34 is on, relay 62 becomes self-holding state and relay 6
Even if 0 is turned off, relay 62 is turned on.

Further, the common side terminal of the c contact 60b of the relay 60 is grounded via another a contact 62b of the relay 62. Furthermore, the open-circuit side terminal of this c contact 60b is connected to the power supply + via the excitation coil of the relay 64.
Connected to V. Therefore, this relay 64
is turned on in synchronization with the relay 60 being turned on in a state in which the relay 62 is turned on, that is, the relay 34 is turned on and the relay 60 is once turned on.

The common side terminal of the C contact 28a of the relay 28 and one telephone line 12a are connected through one A contact 64a of the relay 64. In addition, the relay 28
The common side terminal of the C contact 28b and the other telephone line 1
2b is connected. Therefore, telephone line 12
When the called party's ring tone is transmitted to a and 12b, the ring tone is transmitted to the telephone set 16.

On the other hand, one end of the excitation coil of the time lag relay 66 is connected to the closing side terminal of the c-contact 60b of the relay 60 described above, and the other end of this excitation coil is connected to the power supply +V. This time lag relay 6
6 includes a time-limited A contact 66a, and in this embodiment, the time-limited A contact 66a is set to turn on when an input is applied to the relay 66 for, for example, 2.5 seconds or more.

Time-limited a contact 66a of this time lag relay 66
The input terminal of the timer circuit 68 is grounded through the ground. When the input terminal of this timer circuit 68 is grounded, its output terminal remains at a low level for a certain period of time, for example, 3 seconds.

The output end of this timer circuit 68 is connected to the power supply +V via the excitation coil of the relay 70. Therefore, relay 70 is turned on when the ringing tone disappears (when the called party answers).

An input end of a response message circuit 72 serving as response message transmitting means is grounded via one a contact 70a of this relay 70. The output end of this response message circuit 72 is connected to one telephone line 12a via another a contact 70b of the relay 70. Furthermore, other a contacts 7 of the relay 70
The other telephone line 12b is grounded via 0c. Therefore, by turning on relay 70, response message circuit 72 is disconnected from telephone line 1.
For example, to 2a, 12b (called party), "This is Osaka."
A response message indicating the location of the caller is sent. This response message circuit 72 is also similar to the above-described transmission message circuit 54, for example.
It includes a memory element such as a PROM, and data corresponding to a message is stored in this PROM.

Further, the positive terminal of a capacitor 74 is connected to the common side terminal of one c-contact 70d of the relay 70, and the negative terminal of this capacitor 74 is grounded. Furthermore, the open-circuit side terminal of the c contact 70d of the relay 70 is connected to the power supply +V via a resistor 75. Therefore, when relay 70 is turned on, charge is stored in capacitor 74.

Further, one end of the excitation coil of the relay 76 is connected to the negative terminal of the capacitor 74, and the other end of the excitation coil is connected to the closing side terminal of the c-contact 70d. Therefore, when the relay 70 is turned from on to off, the charge stored in the capacitor 74 is applied to the excitation coil of the relay 76, and the relay 76 is turned on for a short time.

The a contact 76a of this relay 76 is connected to the relay 3.
0 A contacts 30a are connected in parallel, one end of these contacts is grounded, and the other end of these contacts is connected to the power supply + through the excitation coil of the relay 28.
Connected to V.

Note that a capacitor 78 is connected in parallel to the excitation coil of the relay 28 in order to delay its return time.

Next, referring to FIG. 1, based on the flow diagram shown in FIG. 2 and the timing chart shown in FIG. 3,
The operation of this embodiment will be explained.

First, in the first step S1, the switch 20 of the telephone 16 dedicated to automatic calling is turned on. This is done by the calling party, for example, by lifting the handset of the telephone 16. and,
When the switch 20 is turned on, the relay 34
is turned on, the relay 24 is turned on, and the process advances to step S3.

In this step S3, since the relay 24 is turned on, the telephone 14 is connected to the telephone line 12a.
and 12b.

In the next step S5, since the relay 34 was turned on in the previous step S1, the relay 34 is turned on.
0 is turned on, and an activation signal for calling a specific called party is transmitted from the activation signal transmission circuit 32 to the telephone lines 12a and 12b.

Then, in the next step S7, it is detected whether the activation signal has ended. This detection is performed by the activation signal end detection circuit 46. When the start signal transmission circuit finishes transmitting the start signal,
The output end of the starting signal end detection circuit 46 becomes low level, the timer circuit 48 and the relay 58 are turned on, and the process advances to the next step S9.

In step S9, a message is sent to the telephone 16 for a certain period of time. In this case, as the timer circuit 48 is turned on in step S7, the relay 52 is turned on for three seconds, and a message such as "You are calling" is repeatedly sent from the response message circuit 54 to the telephone set 16 for a certain period of time. be done. That is, when the time (3 seconds) set by the timer circuit 48 has elapsed, the relay 52 is reset, and thereby the response message circuit 5
4 is completed. Note that this outgoing message takes some time to activate the called party's receiving device on toll-free service telephone lines, so it may take some time for the called party's receiving device to function and the ringtone to be sent. done in between.

On the other hand, in step S11, a ringing tone is detected. In this case, since the relay 58 was turned on in the previous step S7, the ringing detection circuit 56
are connected to the telephone lines 12a and 12b, and the ringing tone detection circuit 56 detects the ringing tone. This ring tone is 400Hz to notify the caller that a ringing signal is being sent to the called party.
It is an audible signal modulated at 16 Hz, which is transmitted for 1 second every 3 seconds, as shown in FIG. 3 (1 second transmitted, 2 seconds stopped, repeated).

Then, in step S13, the ringing tone is transmitted to the telephone set 16. That is, this step 13
Now, when the ringing signal detection circuit 56 receives a ringing tone, the relay 60 is turned on for 1 second every 3 seconds in synchronization with the ringing tone. Once this relay 60 is turned on, the relay 62 is held in the on state.

In this case, when relay 60 is on (ringing), relay 64 is on, thereby causing telephone 16 to connect to telephone lines 12a and 1.
2b. Therefore, the ring tone is transmitted to the telephone 16.

In step S15, it is determined whether the ringing tone has disappeared (or whether the called party has answered). That is, when there is a ringing tone, the relay 60 is
It is restored for only 2 seconds every second, and the time lag relay 66 does not operate. Then the called party answers,
If the relay 60 is restored for 2.5 seconds or more, it is determined that the called party has answered, and the time lag relay 6 is activated.
6 is activated and the process advances to the next step S17.

In step S17, since the relay 60 has been restored, the telephone 16 is connected to the telephone lines 12a and 12a.
It is separated from 2b.

In step S19, the telephone lines 12a, 12b
A response message is sent for a certain period of time. That is, in step S19, the previous step S15
When the time lag relay 66 is activated, the timer circuit 68 is activated for 3 seconds, during which time the relay 70 is turned on and the response message circuit 7 is activated.
2 to telephone lines 12a and 12b (called parties),
For example, a response message such as "This is Osaka" is sent. Note that in this case, when the relay 70 is in the on state, charge is stored in the capacitor 74.

In the next step S21, the telephone 16 is connected to the telephone lines 12a and 12b, and the calling party and the called party can talk. That is, this relay 70 is turned on and then reset after 3 seconds, so the charge stored in the capacitor 74 is discharged to the relay 76, the relay 76 is turned on for a short time, and when the relay 76 is turned on, , relay 28 is turned on and telephone 16 is connected to telephone lines 12a and 12b. Therefore, in this state,
The calling party can have a conversation with the called party.

Although the relay 76 turns off in a short time after being turned on, the relay 30 is turned on by connecting the telephone 16 and the telephone lines 12a and 12b, and thereby the relay 76 turns off. 28
remains on.

Also, if the relay 28 is turned on, the relay 34
is turned off, thereby causing the activation signal oscillator 3
2 etc. are restored.

Then, in the next step S23, for example, when the conversation between the calling party and the called party is over, by turning off the switch 20 of the telephone 16, the relay 30 is turned off, and the entire apparatus is turned off. returns to its original state.

In addition, in the above-mentioned embodiment, two telephones 14 and 16 are provided, but one telephone 14
It doesn't have to be there. Further, in that case, relays 24 and 26 for disconnecting telephone set 14 or 16 from telephone lines 12a and 12b become unnecessary.

Furthermore, in the above-described embodiment, after the activation signal for calling a specific called party is transmitted, the outgoing message circuit 72 is configured to send out an outgoing message to the calling party. Message circuit 72 may not be provided.

Further, in the above-described embodiment, a contact relay was used to operate each circuit, but a non-contact relay may be used instead of this relay.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing one embodiment of the present invention. FIG. 2 is a flow diagram for explaining the operation of this embodiment. FIG. 3 is a timing diagram for explaining the operation of this embodiment. In the figure, 10 is a telephone automatic calling device;
and 12b are telephone lines, 18 and 20 are switch switches, 22 is a switching circuit, 32 is an automatic transmission circuit, 38 is a starting signal transmitter, 46 is a starting signal end detection circuit, 48 is a timer circuit, 54 is a sending message circuit, 56 66 is a time lag relay, and 72 is a response message circuit.

Claims (1)

[Scope of Claims] 1. Activation signal transmitting means connected to a telephone line and transmitting an activation signal for calling a specific called party by turning on a switch of a caller's telephone; Start signal end detection means for detecting that the transmission of the start signal by the signal transmission means has been completed; responsive to the detection that the start signal end transmission has been completed by the start signal end detection means; an outgoing message transmitting means for transmitting an outgoing message to the telephone of the calling party; ring tone completion detection means for detecting that the called party's ring tone has disappeared; an automatic telephone calling device, comprising a response message transmitting means for transmitting a response message to the called party.