JP2003298768A - Communication system enabling arbitrary reception to data-communication terminal device utilizing telephone network - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a communication system enabling an arbitrary reception to a data-communication terminal device without ringing a telephone for the idle time of a telephone circuit by utilizing an existing telephone network. <P>SOLUTION: Subscriber-line exchanges 2a and 2b transmit pre-speaking information to a reception-side subscriber circuit in the case of a reception from a specific subscriber circuit to another specific subscriber circuit. Controllers 5a to 5d are connected to the upper orders of the telephones 4a to 4d in the subscriber circuits 3a to 3d receiving pre-speaking information, and the data-communication terminal devices 6a to 6c are connected to the controllers. The subscriber-line exchanges transmit pre-speaking information as specific pre-speaking information when the reception selects the controllers or the data-communication terminal devices. The controllers connect the data-communication terminal devices connected to the controllers and the subscriber- line exchanges when pre-speaking information is specific pre-speaking information, but the controllers connect circuits in low orders of the controllers and the subscriber- line exchanges when pre-speaking information is not specific pre-speaking information. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention utilizes an existing telephone network to perform data communication between a center-side data transmitting / receiving device and a data communication terminal device or between data communication terminal devices without ringing a telephone. The present invention relates to a communication system capable of performing communication.

[0002]

2. Description of the Related Art The daily talk time on a subscriber telephone line is 5 to 15 minutes on average, and its utilization efficiency is extremely low. Therefore, when the amount of data to be transmitted is small and the transmission capability may be low. , Data communication by computer,
Generally, this is done using a subscriber telephone line. However, in the data communication by the subscriber telephone line, if data is transmitted from the transmitting side at any time, there arises a problem that the bell of the receiving side telephone rings. To prevent this, by adding an automatic answer function to the modem, it is possible to automatically receive an incoming call without ringing the bell of the telephone at the time of data transmission. The original purpose of the telephone cannot be achieved. this is,
The purpose of data communication is to allow operators such as electric power companies, water companies, and gas companies to perform remote meter reading on homes or companies with telephones installed, and operators such as vending machines to perform remote control. This is a particular problem when doing so.

Therefore, the dial-up connection service is now widely used. In this case, each subscriber of the dial-up connection service will
A call is sent from a communication terminal device and connected to a destination computer or a data transmission / reception device (a computer that provides a service for a specific purpose, a management center, an Internet provider, etc.) Then, it is confirmed whether or not there is data to be received in the computer or the like at the connection destination, and if there is data, the data is transmitted to its own communication terminal device.

According to this method, even when there is no data to be received, transmission (calling operation) by the subscriber and communication for confirming the presence / absence of data to be transmitted from the connected computer are wastefully performed. I have a problem. If you try to obtain the data promptly after the data to be transmitted has been generated on the other party's computer, etc.
For example, it will be increased to 30 minutes, 10 minutes, 5 minutes,
Problems such as the original influence on telephone communication, communication cost, and communication processing capacity of the other party's computer will become a problem.

[0005]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to utilize an existing telephone network to receive an arbitrary incoming call to a data communication terminal device in a free time of a telephone line without ringing the telephone. It is to provide a communication system that enables the communication.

[0006]

In order to solve the above problems, a first invention is directed to a telephone network, a plurality of subscriber line exchanges arranged in the telephone network, and the plurality of subscriber line exchanges respectively via subscriber lines. At least one telephone set connected to each of the subscriber line exchanges, and when the subscriber line makes a call, the subscriber line exchange on the calling side is predetermined to the subscriber line switch on the called side. The connection information of the receiving side, the subscriber line exchange on the receiving side, based on the connection information, when it is recognized that the incoming call is from a specific subscriber line to another specific subscriber line, Pre-call notification information is sent to the subscriber line on the receiving side, and the pre-call notification information is monitored on the upper side of the telephone in the subscriber line that can receive the pre-call notification information. Then
A controller for controlling connection and disconnection with the subscriber line exchange is connected, and the controller is connected with a data communication terminal device or another telephone in parallel with the telephone, and the subscriber line of the receiving side is connected. When the incoming call is to select the controller, the data communication terminal device or the other telephone connected to the subscriber line on the called side, the pre-call notification information is given to the pre-call notification information. When the pre-call notification information is the specific pre-call notification information, the controller sends the information to the data communication terminal device or the another telephone connected to the controller and the incoming call. Connect to the local subscriber line exchange,
When the pre-call notification information is not the specific pre-call notification information, the lower line of the controller and the called-side subscriber line exchange are connected, and the telephone network further comprises: When another telephone network independent of this is connected, and a subscriber line in the other telephone network makes a call to a subscriber line of the telephone network, the called subscriber's line exchange switches to the other telephone network. If it is recognized that the incoming call is from a particular subscriber line in the other telephone network to a particular subscriber line in the telephone network, based on the connection information from the And transmitting predetermined notification information before a call.

In order to solve the above problems, the second invention is a telephone network and at least one telephone network arranged in the telephone network.
A subscriber line exchange, and a plurality of telephones connected to the subscriber line exchange via subscriber lines respectively, and the subscriber line exchange has a specific connection to the subscriber line exchange. When a signal indicating an incoming call to another specific subscriber line is received from the subscriber line of the above, predetermined pre-call notification information is sent to the called subscriber line. A controller for monitoring the pre-call notification information and controlling the connection and disconnection with the subscriber line exchange is connected to the upper side of the telephone in the subscriber line that can receive the notification information, and the controller has data. A communication terminal or another telephone is connected in parallel to said telephone,
When the signal indicating the incoming call is for selecting the controller, the data communication terminal device or the other telephone connected to the incoming call side subscriber line, the subscriber line exchange before the call The notification information is transmitted as specific pre-call notification information, and the controller, when the pre-call notification information is the specific pre-call notification information, a data communication terminal device connected to the controller or Connecting the other telephone and the subscriber line exchange,
When the pre-call notification information is not the specific pre-call notification information, the lower line of the controller and the subscriber line exchange are connected, and the telephone network is independent of this. Another telephone network is connected, and when a subscriber line in the other telephone network makes a call to a subscriber line of the telephone network, the subscriber line exchange on the receiving side is connected from the other telephone network. Based on the information, when it is recognized that the incoming call is from a particular subscriber line in the other telephone network to a particular subscriber line in the telephone network, a predetermined call is made to the called subscriber line. The communication system is configured such that pre-call notification information is transmitted.

In the structures of the first and second inventions, preferably, at least one of the subscriber line exchanges is
When a computer on the center side is connected via a subscriber line and the computer on the center side performs data communication, the subscriber line to which the computer on the center side is connected is connected by the associated subscriber line exchange. , The specific subscriber line is recognized. More preferably, in the computer on the center side, a user who is the owner of the subscriber line that can receive the pre-call notification information and desires data communication with the computer on the center side is registered. The computer on the center side is provided with a list of access information including at least the telephone number of the data communication terminal device regarding the subscriber line of the registered user, and the registered user is registered according to the list of access information. The subscriber line can be polled.

Further preferably, the telephone network is further provided with an incoming call management server that manages incoming calls to the data communication terminal device connected to a subscriber line that can receive the pre-call notification information. The management server includes a database that stores incoming call approval / disapproval information including at least a list of outgoing telephone numbers that the data communication terminal devices connected to each of the subscriber lines allow incoming calls, and the incoming call management server includes: When an inquiry is received from the subscriber line exchange, the call acceptance / rejection information regarding the subscriber line on the receiving side is sent to the subscriber line exchange, and the subscriber line exchange receives the relationship based on the call acceptance / rejection information. When the incoming call is permitted by the data communication terminal device, the corresponding specific pre-call notification information is sent to the called subscriber line. It has become to so that.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic diagram showing the overall configuration of a communication system according to an embodiment of the present invention.
As shown in FIG. 1, the communication system of the present invention includes a telephone network 1, at least one subscriber line exchanges 2a and 2b arranged in the telephone network 1, and in this embodiment, subscriber lines respectively. Subscriber line exchanges 2a, 2 via 3a-3e
It has a plurality of telephones 4a-4e connected to b.

When the subscriber's line originates, the originating subscriber's line exchange, for example, the subscriber's line exchange 2b is connected to the destination's subscriber's line exchange, for example, the subscriber's line exchange 2a with predetermined connection information. (The telephone number of the calling subscriber line, the telephone number of the called subscriber line, and other information related to the calling subscriber line) is transmitted, and the called subscriber line exchange 2a.
When it recognizes that the incoming call is from a particular subscriber line to another particular subscriber line based on the connection information, it sends the specified pre-call notification information to the called subscriber line. It is designed to be sent out. Alternatively, when the subscriber line exchanges 2a and 2b each receive a signal indicating an incoming call from a specific subscriber line connected to the subscriber line exchange to another specific subscriber line, the subscribers of the receiving side join. The predetermined pre-call notification information is sent to the private line. In this case, the subscriber line exchanges 2a and 2b connect to the telephone line of the subscriber line of the receiving side, which is input in addition to the telephone number of the subscriber line of the receiving side when the call is made from the particular subscriber line. By receiving the number indicating that it is an outgoing call,
It recognizes that it is an outgoing call from a specific subscriber line or an incoming call to a specific subscriber line. In the following description, the telephone number means not only the telephone number of the subscriber line but also the telephone number of the subscriber line and a number that is input in addition to the telephone number. Alternatively,
The subscriber line exchanges 2a and 2b are provided with a list including at least telephone numbers of specific subscriber lines registered in advance, and when the call origination or the call termination is related to the registered subscriber line. , It is designed to recognize that it is an outgoing call from a specific subscriber line or an incoming call to a specific subscriber line.

Further, the subscriber line switch which monitors the subscriber line capable of receiving the pre-call notice information, in this embodiment, the telephone lines 4a to 4d in each of the subscriber lines 3a to 3d, monitors the pre-call notice information. Controllers 5a to 5d are connected to control connection and disconnection with 2a and 2b. Data communication terminal devices 6a to 6c are connected in parallel to the telephones 4a to 4d to the controllers 5a to 5c, and another telephone 10 is connected to the telephone 4d in parallel to the controller 5d. The data communication terminal devices 6a to 6c are, for example, computers attached to electricity, water, and gas meters installed in factories, businesses, homes, and the like. The pre-call notification information is, for example, the telephone numbers of the telephones 4a to 4d or the controller 5a.
.About.5d, data communication terminal devices 6a to 6c, or another telephone 10 for identifying the telephone number or code.

In the subscriber line exchanges 2a and 2b, an incoming call (a signal indicating an incoming call) is received from a controller 5a to 5d, a data communication terminal device 6a to 6c, or another telephone set 10 connected to the incoming subscriber line. When selected, the pre-call notification information is sent as specific pre-call notification information.

When the pre-call notification information is the specific pre-call notification information, the controllers 5a-5d control the controllers 5a-5.
When the data communication terminal devices 6a to 6c or another telephone set 10 connected to d are connected to the related subscriber line exchanges 2a and 2b, but the pre-call notification information is not the specific pre-call notification information, the controller. The subordinate circuits 5a to 5d are connected to the subscriber line exchanges 2a and 2b related thereto. If the pre-call notification information sent to the subscriber line does not include valid information, or if the pre-call notification information is not sent to the subscriber line, Even when a normal call signal is sent, the lower lines of the controllers 5a to 5d are connected to the associated subscriber line exchanges 2a and 2b.

At least one of the subscriber line exchanges,
In this embodiment, a computer 8 on the center side is connected to the subscriber line exchange 2b via a subscriber line 7. Then, when the computer 8 on the center side performs data communication, the subscriber line 7 is recognized by the subscriber line exchange 2b as a specific subscriber line. The computer 8 on the center side is, for example, a computer of a meter reading or control center of a business operator of electricity, water, gas, or a vending machine, or a computer of a public relations center of a public organization.

The computer 8 on the center side is a user who owns the subscriber lines 3a to 3d that can receive the pre-call notification information and wishes to perform data communication with the computer 8 on the center side, for example, the subscriber line. Owners of 3a to 3c are registered. Then, the computer 8 on the center side is provided with a list of access information including at least telephone numbers of the data communication terminal devices 6a to 6c related to the subscriber lines 3a to 3c of the registered user, and according to the list of access information, The subscriber lines 3a to 3c of the registered users can be polled.

The computer on the center side is connected to any of the controllers 5a to 5d in the subscriber lines 3a to 3d, the data communication terminal devices 6a to 6c, or the other telephone 1.
It is also possible to connect instead of 0.

The telephone network 1 is further provided with an incoming call management server 9 for managing incoming calls to the data communication terminal devices connected to the subscriber lines 3a to 3d which can receive the pre-call notification information. To be done. The incoming call management server 9 includes a database 9a that stores incoming call approval / disapproval information including at least a list of outgoing telephone numbers that the data communication terminal devices 6a to 6c connected to the subscriber lines 3a to 3d allow incoming calls. There is.

The incoming call management server 9 is a subscriber line exchange 2.
When an inquiry is received from a or 2b, the call acceptance / rejection information regarding the called subscriber line is sent to the subscriber line exchanges 2a and 2b. The subscriber line exchange 2a,
2b, based on the call acceptance / denial information, when the incoming call is permitted by the relevant data communication terminal device, the corresponding specific pre-call notification information is sent to the called subscriber line. There is. Now, for example, in the list of the call approval / disapproval information stored in the database 9a, the telephone number and the center of the data communication terminal device 6c are set as the calling telephone numbers that the data communication terminal device 6a connected to the subscriber line 3a permits the incoming call. If the telephone number of the computer 8 is registered, the data communication terminal device 6c,
Alternatively, in the case of an incoming call from the computer 8 on the center side to the data communication terminal device 6a, the subscriber line exchange 2a sends the corresponding specific pre-call notification information to the subscriber line 3a on the called side. In the case of an incoming call from the terminal device 6b to the data communication terminal device 6a, the subscriber line exchange 2a does not allow the incoming call to the subscriber line 3a.

Further, the telephone network 1 may be connected to another telephone network (an international telephone network, a mobile mobile telephone network, a telephone network using CATV, the Internet, etc.) which is independent of this. In this case, when a subscriber line in another telephone network makes a call to a subscriber line in the telephone network 1, the subscriber line exchange 2 on the receiving side is called.
a and 2b, based on the connection information from another telephone network, when it is recognized that the incoming call is from a particular subscriber line in the other telephone network to a particular subscriber line in the telephone network 1, Pre-call notification information is sent to the called subscriber line.

In this communication system, a data communication terminal device 6c (calling side data communication terminal device) connected to a specific subscriber line 3c is connected to another specific subscriber line 3a. Consider a case where a call is made to (the data communication terminal device on the receiving side). The calling subscriber's line exchange 2b, when the subscriber's line 3c makes a call,
Predetermined connection information is sent to the subscriber's line exchange 2a on the called side. The terminating side subscriber line exchange 2a recognizes that the incoming call is from a particular subscriber line 3c to a particular subscriber line 3a based on the connection information from the originating side subscriber line exchange 2b. .

Next, the subscriber's line exchange 2a on the called side makes an inquiry to the incoming call management server 9, and the incoming call management server 9
Receives the call acceptance / denial information regarding the subscriber line 3a on the called side. Then, the subscriber line exchange 2a determines whether or not to make an incoming call to the subscriber line 3a, based on the incoming call permission / refusal information. At this time, if the data communication terminal device 6a connected to the subscriber line 3a permits the incoming call from the data communication terminal device 6c, the pre-call notification information is sent to the subscriber line 3a.

In this way, the subscriber line exchange 2a first sends an activation signal to the called subscriber line 3a. In response to this activation signal, the controller 5a temporarily disconnects the telephone 4a, which is a subordinate of the telephone, and at the same time, the subscriber line exchange 2
A (primary) response signal is transmitted to a. Upon receiving the primary response signal, the subscriber line exchange 2a sends out the pre-call notification information to the called subscriber line 3a. In this case, the pre-call notification information selects the controller 5a connected to the called subscriber line 3a or the called data communication terminal device 6a connected thereto (the controller 5a or the called data communication terminal device). 6a). Therefore, the subscriber line exchange 2a sends the pre-call notification information as specific pre-call notification information.

Then, the controller 5a, in response to the specific pre-call notification information, sets the receiving side data communication terminal device 6a (without connecting to the lower line of the controller) to the subscriber line exchange 2a. And sends an information reception completion signal to the subscriber line exchange 2a,
Responds to this signal by the data communication terminal device 6a on the receiving side.
Send a call signal to. Receiving side data communication terminal device 6a
Responds to this call signal (secondary), data communication is performed between the originating side data communication terminal device 6c and the receiving side data communication terminal device 6a. This data communication can be performed simultaneously or sequentially between one originating side data communication terminal device and a large number of terminating side data communication terminal devices.

Calls and data communication between such specific subscriber lines are also performed between the subscriber lines 3a and 3b, that is, between the specific subscriber line on the originating side and the specific line on the receiving side. The same is done when the subscriber line is connected to the same subscriber line exchange.

The computer 8 on the center side communicates with the data communication terminal devices 6a to 6c connected to the respective subscriber lines 3a to 3c according to the list of access information relating to the user's registered subscriber lines 3a to 3c. Polling can be done without ringing the phones 4a-4c involved. In this case, the connection of the line between the computer 8 on the center side and each of the data communication terminal devices 6a to 6c is performed in the same manner as in the case of the data communication between the data communication terminal devices described above. In this way, the computer 8 on the center side sequentially inquires of each of the data communication terminal devices 6a to 6c whether or not there is a data transmission request, and permits the data communication terminal device having the transmission request to transmit data. On the other hand, each of the data communication terminal devices 6a to 6c unconditionally receives the data transmitted from the computer 8 on the center side.

It is also assumed that the telephone set 10 (calling side telephone set) connected to the specific subscriber line 3d makes a call to the telephone set 4a (receiving side telephone set) connected to another specific subscriber line 3a. In this case, the subscriber line 3 of the calling side telephone 10
The controller 5d connected to d does not participate in the transmission operation.
The originating side subscriber line exchange 2b sends out predetermined connection information to the receiving side subscriber line exchange 2a when the subscriber line 3d originates.

Based on the connection information, the terminating side subscriber line exchange 2a recognizes that the incoming call is from the particular subscriber line 3d to the particular subscriber line 3a. Thus, the terminating side subscriber line exchange 2a first of all sets the terminating side subscriber line 3
An activation signal is sent to the controller 5a connected to a. In response to the activation signal, the controller 5a disconnects the receiving side telephone 4a once and sends a (primary) response signal to the subscriber line exchange 2a. Subscriber line exchange 2
a receives the response signal, the subscriber line 3a on the called side
The pre-call notification information is sent to. In this case, the pre-call notification information includes the identification number (identification code) of the telephone 10.

The controller 5a recognizes that the pre-call notification information is not specific pre-call notification information for selecting the controller 5a or the data communication terminal device 6a connected thereto,
The lower line (that is, the receiving side telephone 4a) is connected to the subscriber line exchange 2a, and a pre-call notification information reception completion signal is sent to the subscriber line exchange 2a.
In response to the completion signal, the subscriber line exchange 2a sends out a ringing signal to the receiving side telephone 4a to make it ring. When the off-hook operation (secondary response) is performed in the receiving-side telephone 4a, a normal call is performed with the calling-side telephone 10 thereafter.

FIG. 2 is a schematic diagram showing the overall configuration of a communication system according to another embodiment of the present invention. This example
In the embodiment of FIG. 1, at least one of the subscriber lines to which the controller is connected (in this embodiment, the subscriber lines 3a and 3c) is notified by the upper level of the controllers 5a and 5c before the call. Upper level controllers 5a 'and 5c' for monitoring information and controlling connection and disconnection with the subscriber line exchanges 2a and 2b are connected. Therefore, in FIG. 2, the same components as those in the embodiment of FIG. 1 are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 2, the upper controller 5
a ', 5c' are respectively assigned to their lower controllers 5a,
5c in parallel with another data communication terminal device 6a ', 6
c'is connected. Then, the controllers 5a, 5a ',
5c and 5c 'indicate that the notification information before the call is the controller 5a, 5c.
a ', 5c, 5c' or specific communication information before selecting a data communication terminal device 6a, 6a ', 6c, 6c' connected to it, the controller 5a, 5
Data communication terminal device 6 connected to a ', 5c, 5c'
a, 6a ', 6c, 6c' are subscriber line exchanges 2a, 2b
If the pre-call notification information is other than that, the lower lines of the controllers 5a, 5a ', 5c, 5c' are connected to the subscriber line exchanges 2a, 2b. There is.

When the telephone set (calling side telephone) 4b connected to the specific subscriber line 3b makes a call to the telephone set (calling side telephone) 4c connected to another specific subscriber line 3c, the subscriber line The exchange 2b is connected to the subscriber line 3 on the receiving side.
The start signal is sent to c. The upper controller 5c 'is set so as not to respond to this activation signal, and the lower controller 5c responds to this activation signal to disconnect the lower telephone 4c and send a primary response signal. Upon receiving this response signal, the subscriber line exchange 2b sends out pre-call notification information (calling telephone number). Upper controller 5
c'and the subordinate controller 5c recognize that the pre-call notification information is not the specific pre-call notification information, and the calling side telephone 4
b is connected to the receiving side telephone 4c, and the lower controller 4c sends a pre-call notification information reception completion signal to the subscriber line exchange 2b. Subsequent operations are the same as in the case of the embodiment of FIG.

The data communication terminal device 6b connected to the specific subscriber line 3b transmits to the data communication terminal device 6c of the lower controller 5c connected to the specific subscriber line 3c to perform data communication. Then, similarly to the case of the embodiment of FIG. 1, the originating side subscriber line exchange 2a sends predetermined pre-call notification information to the receiving side subscriber line exchange 2b, and the receiving side subscriber line The exchange 2b recognizes that the incoming call is from the specific subscriber line 3b to the specific subscriber line 3c, makes an inquiry to the incoming call management server 9, and receives an incoming call from the incoming call management server 9 for the incoming subscriber line 3c. Receive approval / disapproval information. The subscriber line exchange 2b determines whether or not to make an incoming call to the subscriber line 3c based on this incoming / outgoing permission information. If the data communication terminal device 6c connected to the subscriber line 3c permits the incoming call from the data communication terminal device 6b, the pre-call notification information is sent to the subscriber line 3c.

In this way, the subscriber line exchange 2b sends an activation signal to the subscriber line 3c. At this time, the upper controller 5c 'of the subscriber line 3c does not respond to the activation signal and connects to the lower line, that is, the controller 5c, and the lower controller 5c connects to the telephone 4c of the lower line. The connection is broken and the primary response signal is transmitted. (The lowest controller always responds to the activation signal from the subscriber line exchange.)

Upon receiving the primary response signal, the subscriber line exchange 2b sends out the pre-call notification information to the subscriber line 3c. In this case, the pre-call notification information is the subscriber line 3c.
Which selects the lower-order controller 5c connected to or the receiving side data communication terminal device 6c connected thereto (number or code for identifying the controller 5c or the receiving side data communication terminal device 6c) . Therefore, the subscriber line exchange 2b sends the pre-call notification information as specific pre-call notification information.

Since the pre-call notification information is not the specific pre-call notification information for selecting the controller 5c 'or the data communication terminal device 6c' connected thereto, the higher order controller 5c 'joins the lower order line. Connect to the trunk line exchange 2b.
The subordinate controller 5c recognizes this information as specific pre-call notification information for selecting the controller 5c or the data communication terminal device 6c connected thereto, and sets the data communication terminal device 6c to the subscriber line. It connects to the exchange 2b and sends an information reception completion signal to the subscriber line exchange 2b. In response to this signal, the subscriber line exchange 2b sends a call signal to the data communication terminal device 6c. When the data communication terminal device 6c makes a secondary response to the calling signal, data communication is performed between the data communication terminal device 6b and the data communication terminal device 6c.

Similarly to the case of the data communication between the data communication terminal devices, the computer 8 on the center side has the data communication terminal devices 6a, 6a ', 6c, 6c connected to the subscriber line subscriber lines 3a, 3c. It is possible to perform simultaneous or sequential data communication with the ', without ringing the related telephones 4a, 4c.

[0038]

According to the communication system of the present invention, it is possible to make a call to the data communication terminal device without ringing the telephone by using the telephone network, which enables push-type communication and enables the telephone line to be connected. Data communication can be efficiently performed by utilizing the free time, and a large amount of additional equipment investment for that purpose is not required.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an overall configuration of a communication system according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing an overall configuration of a communication system according to another embodiment of the present invention.

[Explanation of symbols]

1 telephone network 2a, 2b Subscriber line switch 3a to 3f subscriber line 4a-4f telephone 5a-5d controller 6a-6c Data communication terminal device 7 subscriber lines 8 Center computer 9 Incoming call management server 9a database 10 different phones

Claims (5)

[Claims] 1. A telephone network, a plurality of subscriber line exchanges arranged in the telephone network, and at least one telephone connected to each of the plurality of subscriber line exchanges via respective subscriber lines. When the subscriber line originates, the originating side subscriber line exchange sends out predetermined connection information to the receiving side subscriber line exchange, and the receiving side subscriber line exchange, Based on the connection information, when it recognizes that the incoming call is from a specific subscriber line to another specific subscriber line, it sends out a predetermined pre-call notification information to the called subscriber line. A controller for monitoring the pre-call notification information and controlling the connection / disconnection of the subscriber line exchange at a higher level of the telephone in the subscriber line that can receive the pre-call notification information. Is connected to the controller Is a data communication terminal device or another telephone is connected in parallel to the telephone, and in the subscriber line exchange of the receiving side, the incoming call is the controller or the controller connected to the subscriber line of the receiving side. When selecting the data communication terminal device or the other telephone,
The pre-call notification information is transmitted as specific pre-call notification information, and the controller, when the pre-call notification information is the specific pre-call notification information, performs data communication connected to the controller. The terminal device or the other telephone is connected to the called-side subscriber line exchange, but when the pre-call notification information is not the specific-pre-call notification information, the lower line of the controller and the called side A subscriber line switch is connected to the telephone network. Further, another telephone network independent of the telephone network is connected to the telephone network, and a subscriber line in the other telephone network is a subscriber of the telephone network. When the call is sent to the line, the called subscriber's line exchange, based on the connection information from the other telephone network, receives the call from a particular subscriber line in the other telephone network to a specific one in the telephone network. Subscriber times Communication system, characterized in that when recognizing to be of the, adapted to deliver a predetermined pre-call notification information to the called party subscriber lines to. 2. A telephone network, at least one subscriber line exchange arranged in the telephone network, and a plurality of telephones connected to the subscriber line exchange via respective subscriber lines. When the subscriber line exchange receives a signal indicating an incoming call from another particular subscriber line connected to the subscriber line exchange to another particular subscriber line switch, Pre-call notification information is sent out, and the pre-call notification information is monitored at a higher level of the telephone in the subscriber line that can receive the pre-call notification information, and the pre-call notification information is exchanged with the subscriber line exchange. A controller for controlling connection and disconnection is connected, a data communication terminal device or another telephone is connected to the telephone in parallel to the controller, the subscriber line exchange, the signal indicating the incoming call, Join the called party When the controller, the data communication terminal device, or the other telephone connected to the private line is selected, the pre-call notification information is sent as specific pre-call notification information. When the pre-call notification information is the specific pre-call notification information, the switch connects the data communication terminal device or the other telephone connected to the controller with the subscriber line switch, but before the call. When the notification information is not the specific pre-call notification information, the subordinate line of the controller is connected to the subscriber line exchange, and the telephone network is provided with another independent line. When a telephone network is connected and a subscriber line in the other telephone network makes a call to a subscriber line in the telephone network, the subscriber line exchange on the receiving side,
When it is recognized that the incoming call is from a specific subscriber line in the other telephone network to a specific subscriber line in the telephone network based on the connection information from the other telephone network, A communication system characterized in that it sends predetermined pre-call notification information to a subscriber line. 3. A center-side computer is connected to at least one of the subscriber line exchanges via a subscriber line, and when the center-side computer performs data communication, the center-side computer is connected. 3. The communication system according to claim 1 or 2, wherein the subscriber line to which is connected is recognized as the specific subscriber line by the associated subscriber line exchange. 4. A user who is a subscriber line subscriber who can receive the pre-call notification information and desires data communication with the center computer is registered in the center computer. The computer on the center side has a list of access information including at least the telephone number of the data communication terminal device concerning the subscriber line of the registered user, and the registered information is registered according to the list of access information. 4. The communication system according to claim 3, wherein the subscriber line of the user can be polled. 5. An incoming call management server that manages incoming calls to the data communication terminal device connected to a subscriber line that can receive the pre-call notification information is arranged in the telephone network. Includes a database storing call acceptance / denial information including at least a list of outgoing telephone numbers for which the data communication terminal devices connected to each of the subscriber lines permit incoming calls. When receiving an inquiry from the private branch exchange,
The incoming call approval / disapproval information related to the subscriber line on the called side is transmitted to the subscriber line exchange, and the subscriber line exchange,
When the incoming call is permitted by the relevant data communication terminal device based on the incoming call permission / denial information, the corresponding specific pre-call notification information is sent to the incoming call side subscriber line. The communication system according to any one of claims 1 to 4.