JPH0213163A - Private telephone system, its caller the same equipment and called party the same equipment - Google Patents

Abstract

PURPOSE:To avoid a trouble due to a phone call such as a mischievous phone call completely by providing an identification signal generating section sending an identification signal via a telephone line. CONSTITUTION:A caller side equipment 10 consists of an identification request signal discrimination section 11 and an identification signal generating section 12. Thus, even if a call signal reaches by dialing from the caller, an identification signal sent from the caller side equipment 10 reaches the called party equipment and so long as the content is not a prescribed signal, since the acceptance of the incoming call is not allowed, an undesired call to the called subscriber is rejected entirely positively.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a telephone system that uses public telephone lines, and relates to a private telephone system that allows calls only between specific subscribers; Regarding the calling side device and the called side device.

BACKGROUND OF THE INVENTION Telephone networks using public telephone lines (hereinafter simply referred to as telephone lines) are now widespread and have become an essential system for social life.

As is well known, when the calling party picks up the handset of the telephone and dials, the dialing information corresponding to the dialed telephone number is transmitted to the exchange via the calling party's subscriber line. , via trunk lines within the telephone network,
Finally, the line to the exchange to which the called party's subscriber line is connected has been selected and completed, so the exchange can send out a ringing signal to the called party's telephone via the called party's subscriber line. It is now possible to do so. The telephone on the receiving side can ring in response to the ringing signal to notify that there is a 41 call, so if the subscriber on the receiving side picks up the receiver in response to this, the subscriber on the calling side can hear the call. It is possible to make a call with.

According to the prior art, the called party's telephone is simply selected by the calling party's designation of the called party's telephone number, and the bell rings in response to the ringing signal. However, there is a drawback in that on the receiving side, it is impossible for the subscriber on the receiving side to select whether or not to accept the call based on the convenience of the subscriber on the receiving side. In other words, incoming calls due to incorrect numbers or malicious prank calls are nothing more than a nuisance to the receiving subscriber, but there is no function to actively reject these calls. In addition, there are many cases where people experience great psychological pressure, anxiety, and irritation.

Therefore, in view of the actual state of the prior art, it is an object of the present invention to provide a function that allows the receiving side to confirm and identify the calling subscriber at that time when a calling signal is received, and to Private Telephone 7 System, which can eliminate the nuisance caused by malicious prank calls, etc., by actively rejecting all incoming calls from non-subscribers. The object of the present invention is to provide a calling side device and a called side device.

Means for Solving the Problems The configuration of the transmitting side device according to this application to achieve the above object is characterized in that it includes an identification signal generation unit that sends out an identification signal via a telephone line. The unit may be activated in response to an identification request signal arriving via a telephone line.

In addition, the gist of the configuration of the receiving side device according to this application is that it is provided with an identification signal determining unit that determines whether or not to accept an incoming call based on an identification signal that arrives via a telephone line. The device includes an incoming call detection unit that detects an arriving call signal, and an identification request signal generation unit that is activated by the incoming call detection unit, and the identification request signal generation unit is configured to send out an identification request signal in response to the call signal. It shall be permitted to do so.

On the other hand, in the configuration of the private telephone system according to this application, the calling side device and the receiving side device are respectively
Its gist is to connect the originating subscriber line and the terminating subscriber line.

Accordingly, when using this configuration, even if a calling signal arrives at the called side due to a dial operation from the calling side, the called side device receives the identification signal sent from the calling side device,
Furthermore, since acceptance of incoming calls is not permitted unless the content is of a predetermined nature, all incoming calls that are unnecessary for the receiving subscriber can be actively rejected.

At this time, the identification signal from the calling device may be repeatedly and automatically sent after the dialing operation is completed from the calling device, or it may be sent as an identification request signal in the audible frequency range sent from the receiving device. In response, the calling signal may be sent manually by the calling subscriber, but if the receiving device is provided with an identification request signal generator, when the calling signal arrives,
Since the identification request signal generation section can be activated via the incoming call detection section and an identification request signal can be sent, the calling side device can
It is also possible to automatically send an identification signal in response to this identification request signal.

It works as described above.

Example Examples will be described below with reference to the drawings.

Calling equipment for private telephone systems (hereinafter simply referred to as
10 (referred to as a transmitting side device) consists of an identification request signal determining section 11 and an identification signal generating section 12 (FIG. 1).

The calling side device 10 is branch-connected to the calling side subscriber line Ll to which the calling side telephone TI is connected, and the identification request signal determining section 11 and the identification signal generating section 12 are connected to the calling side subscriber line Ll, respectively. While connected to Ll, the output of the former is input to the latter as an activation signal 11a.

Called device for private telephone system (hereinafter simply referred to as
(referred to as the called side device) 20 has an incoming call detecting section 21, an identification request signal generating section 22, and an identification signal discriminating section 23 as main components (Fig. 2), and as a whole, the called side telephone T2
is branch-connected to the receiving subscriber line L2 to which the terminating side subscriber line L2 is connected.

The incoming call detection unit 21, the identification request signal generation unit 22, and the identification signal determination unit 23 are each branch-connected to the incoming subscriber line L2, and the output of the incoming call detection unit 21 is output as an activation signal 21b. The signal is input to the identification request signal generating section 22. Further, the outputs of the incoming call detection section 21 and the identification signal discrimination section 23 are inputted to the simulated response section 24 as a response command signal 21a and an incoming call rejection signal 23b, respectively, while the outputs of the simulated response section 24 is connected to the called subscriber line L2. The other output of the identification signal discriminator 23 is connected to the called subscriber line L2 via the bell signal generator 25 as an incoming call acceptance signal 23a. Further, the output of the identification request signal generating section 22 is inputted to the identification signal determining section 23 as a notification signal 22a.

The originating telephone TI and the terminating telephone 1-2 are telephone lines that include the originating subscriber line L1, the originating exchange EXI, the trunk line, the terminating exchange EX2, and the terminating subscriber line L2. They are connected via T and L (Fig. 3). However, it is assumed that the telephone line TL includes telephones of other subscribers other than those shown, other exchanges, trunk lines, etc., and forms a well-known telephone network.

Now, when you pick up the handset of the calling side telephone T1, the calling side telephone 1'l outputs a calling signal St to the calling side exchange EXI (arrow (1) in Fig. 3, hereinafter simply referred to as , (1)), and in response, the originating exchange EXI outputs a dial tone signal S2 (2
), the calling party's telephone] (1) can listen to this.

When the subscriber on the calling side confirms the dial tone and dials the telephone number of the other party, a dial signal S3 corresponding to that number is transmitted (3), and via the calling side exchange EXI,
Finally, it reaches the destination exchange EX2 as the selection signal S4 (4). However, at this time, in the telephone line 1'L, other exchanges and trunk lines are sequentially selected and connected according to the telephone number of the other party, and the most suitable connection is made between the originating exchange EXI and the terminating exchange EX2. to form a line of
A so-called line route selection operation is performed.

Upon arrival of the selection signal S4, the destination exchange EX2:
Since the calling signal S5 is sent to the called subscriber line L2 (5
), this ringing signal S5 rings the bell of the telephone T2 on the called side and can be detected by the incoming call detection section 21 of the called side device 20. Also, the calling subscriber can hear the ring tone at the same time.

When the incoming call detection unit 21 detects the ringing signal S5, it sends a response command signal 21. to the simulated response unit 24. a, and in response, the simulation response unit 24 connects a low-resistance dummy load to the called subscriber line L2.
Assume that a state in which the receiver of the called telephone T2 is picked up is simulated. Therefore, the simulated response state at this time is a simulated response signal S6 from the called exchange EX2.
(6), the terminating exchange EX2 sends a response signal S7 to the originating exchange EXI (7), whereby the line between the originating subscriber line L1 and the terminating subscriber line L2 is The connection operation is completed.

On the other hand, the incoming call detection section 21 sends an activation signal 21b to the identification request signal generation section 22 in response to the paging signal S5,
Start this. The identification request signal generation unit 22 sends an identification request signal S8 in an arbitrary format determined in advance to the identification request signal discriminating unit 11 of the calling side device 10 so that it can be determined as the latter or the identification request signal, to the called side. Subscriber line L
2 (8). For example, it is convenient to use an arbitrary number of pulse signals in a specific frequency range as the identification request signal S8. It may be provided with a pass filter. Furthermore, at the same time as sending out the identification request signal S8, the identification request signal generating section 22 outputs a notification signal 22a to the effect that the identification request signal S8 has been sent to the identification signal determining section 23.

When the identification request signal determination unit 11 detects the identification request signal S8 arriving via the telephone line TL in this way,
An activation signal 11a is sent to the identification signal generator 12 to activate it. The identification signal generation unit 12 is connected to the receiving side device 20
Since the identification signal S9 in an arbitrary format determined in advance so that the latter can be determined as an identification signal is sent to the originating subscriber line L1 between the identification signal discriminating unit 23 of the
), this identification signal S9 reaches the identification signal determination section 23 via the telephone line TL.

Here, the identification signal S9 may be in any format as long as the originating subscriber can express a code indicating that the called subscriber does not reject incoming calls. may be different for each originating subscriber, or may be common to a group of originating subscribers whose incoming calls are not rejected by the terminating subscriber.

When the identification signal determination unit 23 receives the identification signal S9 from the identification signal generation unit 12 within a predetermined time after receiving the notification signal 22a from the identification request signal generation unit 22 (9), the identification signal determination unit 23 determines the contents of the code in advance. It is compared with the stored code list, and only when the same code is found on the code list, an incoming call acceptance signal 23a is outputted to the bell signal generation section 25. In response, the bell signal generation unit 25 sends out a bell signal SIO onto the subscriber line L2 on the called side (10), so that the called side telephone T2 rings again, but the ring tone is not the same as the caller. It can also be listened to by the side subscriber. Therefore, the subscriber on the called side picks up the receiver of the called side telephone T2 in response to the ringing (
11), a call can be initiated with the calling subscriber (1-2).

Note that when the called subscriber responds in this manner, or when the calling subscriber hangs up the calling telephone T1 before the called subscriber responds, all of the called The components shall automatically return to the initial standby state.

On the other hand, if the identification signal S9 is not received at all within a predetermined period of time after receiving the notification signal 22a, or even if the identification signal S9 is received, the identification signal determination unit 23 finds the same code on the code list. If this is not possible, an incoming call rejection signal 23b is output to the simulated response unit 24.

In response to this, the simulated response unit 24 unilaterally cancels the simulated response state of the called subscriber line L2 by, for example, disconnecting the dummy load connected to the called subscriber lines 1 and 2. , the incoming call at this time can be definitely rejected.

Such private telephone systems can be constructed in various forms.

For example, for one called telephone 1-2, any number of calling telephones Tl, Tl, Tl, Tl, etc.
When combining ..., the calling side telephone T1...T
It is assumed that the transmitting device 10 attached to each of the terminals 1, . In this case, each sending device 10 sends out an identification signal S9 with a unique code, and the receiving device 20 is configured to be able to individually identify all of these codes. Good too.

In addition, in the case where a pair is formed of one calling side telephone Tl and one called receiving side telephone T2, and only communication between them is permitted, both telephones T1 and T2 are connected to the calling side device 10 and the called side A device 20 is attached to each receiving device 2.
0 may be configured to identify only the code of the identification signal S9 sent from the transmission side device 10 of the other party.

Furthermore, when a plurality of calling side telephones Tl, Tl, etc. are grouped into a - group and only mutual calls within this group are permitted, each calling side telephone T1 has a calling side device 10.
and a called side device 20 are attached, and each calling side device 10 sends an identification signal S9 consisting of a common code within the group, while each called side device 20 identifies this. Alternatively, each calling device 10 sends out an identification signal S9 with a unique code, and each receiving device 20
may accept only the code of the identification signal S9 from one or more calling devices 10, 10, .

Another Embodiment The identification signal generating unit 12 of the calling side device 10 does not wait for the activation signal 11a from the identification request signal determining unit 11, but simultaneously sends the dial signal S3 from the calling side telephone T1.
Alternatively, the identification signal S9 may be repeatedly sent out immediately after the sending is completed. Identification request signal determination unit 1
1 and the identification request signal generating section 22 of the called device 20 are no longer required, so the overall configuration can be significantly simplified.

Furthermore, the identification signal generator 12 may be activated by manual operation by the calling subscriber. At this time, the identification request signal S8 from the receiving side device 20 is a voice guide signal, and a message is sent to the calling side subscriber to the effect that the identification signal generator 12 should be activated and an identification signal S9 should be sent. It is convenient to use it as a signal.

The receiving device 20 may also be provided with an audio device for transmitting a message signal to the receiving subscriber line L2 when a call is rejected. In other words, call rejection signal 2
3b, before operating the simulated response unit 24,
When this audio device is activated, it sends a message to the calling subscriber whose call is rejected, informing the calling subscriber that calls are allowed only to the specific calling subscriber, and then conveys guidance information. , the simulated response state of the called subscriber line L2 can be canceled.

In addition, the called side device 20 according to each of the above embodiments can perform important operations on its overall functions by a manual operation switch or a timer (not shown), and the called side telephone T2 can be operated in a state where the functions of the called side device 20 are not activated. Needless to say, it can be used as a general telephone to receive and answer incoming calls from all calling subscribers.

Further, the calling side device 10 and the receiving side device 20 of the present invention are as follows:
Exactly the same functions can be realized by incorporating them into the originating exchange EX1 and the terminating exchange EX2, respectively.

As described in detail, according to the present invention, a calling side device and a called side device are attached to the calling side subscriber line and the called side subscriber line, respectively, and the called side device is attached to the calling side subscriber line and the called side subscriber line. By determining the identification signal sent from the device, identifying the calling subscriber, and determining whether or not to accept the call, it is possible to proactively block calls from subscribers other than the specified calling subscriber. Since the telephone can be rejected by the telephone, the nuisance caused by the arrival of malicious prank calls, etc. can be reliably wiped out, thereby preventing the promotion of social unrest and preventing the occurrence of crimes using the telephone. It has the remarkable effect of being able to

[Brief explanation of the drawing]

1 to 3 show an embodiment, in which FIG. 1 is an explanatory diagram of the configuration of the transmitting side device, FIG. 2 is an explanatory diagram of the configuration of the receiving side device, and FIG. 3 is an explanatory diagram of the overall configuration. 1” L...Telephone line Ll...Calling side subscriber line L2...Destination side subscriber line S5...Call signal S8...Identification request signal S9...Identification signal 10...Call Side device 12...Identification signal generation section 20...Received side device 21...Incoming call detection section 22...Identification request signal generation section 23...Identification signal determination section

Claims (1)

[Scope of Claims] 1) A calling side device for a private telephone system, comprising an identification signal generator that sends out an identification signal via a telephone line. 2) The calling side for a private telephone system according to claim 1, wherein the identification signal generating section sends out the identification signal in response to an identification request signal arriving via a telephone line. Device. 3) A receiving side device for a private telephone system comprising an identification signal discriminator for determining whether or not an incoming call can be accepted based on an identification signal arriving via a telephone line. 4) An incoming call detection section that detects a calling signal arriving via a telephone line, and an identification request signal generation section that is activated by the incoming call detection section, and the identification request signal generation section responds to the calling signal. 4. A called party device for a private telephone system according to claim 3, wherein the called party device for a private telephone system transmits an identification request signal. 5) Connect the originating device for a private telephone system according to claim 1 to the originating subscriber line, and connect the incoming call for the private telephone system according to claim 3 to the terminating subscriber line. A private telephone system that connects side devices. 6) Connect the originating device for the private telephone system according to claim 2 to the originating subscriber line, and connect the incoming call for the private telephone system according to claim 4 to the terminating subscriber line. A private telephone system that connects side devices.