JP2002271518A - Communication system capable of optionally delivering call to data communication terminal utilizing telephone network - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a communication system, that is capable of optionally delivering a call to a data communication terminal, without making a phone ring in the idle time of a telephone line by utilizing an existing telephone network. SOLUTION: In the case of arrival of a call from a particular subscriber line to other particular subscriber line, subscriber line switches 2a, 2b transmit pre-call notice information to a called subscriber line. Controllers 5a-5d are connected to subscriber lines 3a-3d, through which the pre-call notice information can be received at a pre-stage of phones 4a-4d, and data communication terminals 6a-6c are connected to the controllers. The subscriber line switches 2a, 2b transmit the pre-call notice information as particular before-speech notice information, when the incoming call denotes selection of the correction or the data communication terminals. The controllers connect the data communication terminals connected to the controllers to the subscriber switches, when the pre-call notice information is the particular pre-call notice information but connect the lines after the controllers to the subscriber switches, when the pre-call notice information is not particular pre-call notice information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art The average daily call time of a subscriber telephone line is 5 to 15 minutes, and its utilization efficiency is extremely low. Therefore, when the amount of data to be transmitted is small and the transmission capacity may be low, , Data communication by computer,
Generally, it is performed using a subscriber telephone line. However, in data communication using a subscriber telephone line, if data transmission is performed from the transmitting side at any time, a problem occurs in that the bell of the receiving side telephone rings. In order to prevent this, by adding an automatic answer function to the modem, it is possible to automatically receive a call without ringing the bell of the telephone at the time of data transmission, but when it is an incoming call to the telephone, The original purpose of the telephone cannot be achieved. this is,
The purpose of data communication is when a business such as an electricity business, a water business, or a gas business performs remote meter reading for a home or company where a telephone is installed, or a business such as a vending machine performs remote control. This is particularly problematic when doing so.

[0003] Therefore, the dial-up connection service is now widely used. In this case, each subscriber of the dial-up connection service, when their phone is free,
A call is transmitted from the communication terminal device and connected to a destination computer or a data transmission / reception device (a computer that performs a service for a specific use, a management center, an Internet provider, etc.). Then, it is confirmed whether or not there is data to be received in the connection destination computer or the like, and if there is data, the data is transmitted to its own communication terminal device.

In this method, even when there is no data to be received, a call made by a subscriber (an operation of making a call) and communication for confirming the presence or absence of data to be transmitted from a connected computer or the like are uselessly performed. There is a problem that. If data to be transmitted is generated in the other computer, etc., and the data is to be obtained promptly, the frequency of dial-up connection is set according to the purpose and request.
For example, it will be 30 minutes, 10 minutes, and 5 minutes,
Problems such as the influence on the original telephone communication, the communication cost, the communication processing capacity of the computer of the other party, and the like become problems.

[0005]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a method for receiving an arbitrary incoming call to a data communication terminal device by using an existing telephone network while the telephone line is idle without ringing the telephone. An object of the present invention is to provide a communication system that enables the communication.

[0006]

According to a first aspect of the present invention, there is provided a telephone network comprising: a telephone network; a plurality of subscriber line exchanges arranged in the telephone network; And at least one telephone connected to each of the local exchanges, and when the local line originates, the originating local exchange has a predetermined position with respect to the destination local exchange. The connection information of the receiving side is transmitted, and based on the connection information, the receiving-side local exchange recognizes that the incoming call is from a specific subscriber line to another specific subscriber line, A predetermined pre-call notification information is transmitted to the called subscriber line, and the pre-call notification information is monitored above the telephone in the subscriber line that can receive the pre-call notification information. And
A controller for controlling intermittent connection with the subscriber line exchange is connected, and a data communication terminal device or another telephone is connected to the telephone in parallel with the controller, and the subscriber line on the receiving side is connected to the controller. The exchange, when the incoming call is to select the controller or the data communication terminal device or the another telephone connected to the called subscriber's line, sends the pre-call notification information to the specific pre-call notification. The controller transmits the incoming call to the data communication terminal device or another telephone connected to the controller when the pre-call notification information is the specific pre-call notification information. To the local exchange,
When the pre-call notification information is not the specific pre-call notification information, a communication system is configured to connect a lower line of the controller to the called line switch on the receiving side. It was done.

In order to solve the above-mentioned problems, a second invention is directed to a telephone network and at least one telephone network provided in the telephone network.
And a plurality of telephones respectively connected to the subscriber line exchange via a subscriber line, wherein the subscriber line exchange is a specific telephone connected to the subscriber line exchange. When receiving a signal indicating an incoming call from another subscriber line to another subscriber line, predetermined pre-call notification information is transmitted to the called subscriber line, and the pre-call notification information is transmitted. Monitoring the pre-call notification information above the telephone in the subscriber line that can receive
A controller for controlling connection and disconnection with the subscriber line switch is connected, and a data communication terminal device or another telephone is connected to the controller in parallel with the controller. When the signal indicating the incoming call is to select the controller or the data communication terminal device or the another telephone connected to the called subscriber's line, the pre-call notification information is transmitted to the pre-call notification. When the pre-call notification information is the specific pre-call notification information, the controller is connected to the data communication terminal device or the another telephone connected to the controller. To connect to a private line exchange, but when the pre-call notification information is not the specific pre-call notification information,
The communication system is characterized in that a lower line of the controller is connected to the subscriber line exchange.

In the first and second aspects of the present invention, preferably, at least one of the subscriber lines to which the controller is connected monitors the pre-call notification information above the controller. And at least one higher-level controller for controlling the disconnection of the connection with the relevant local exchange is connected, and each of the higher-level controllers has another controller in parallel with its lower-level controller. A data communication terminal device or another telephone is connected, and the controller is configured so that the pre-call notification information selects the controller or the data communication terminal device connected thereto or another telephone. If the information is information, the data communication terminal or another telephone connected to the controller is connected to the relevant local exchange, but the pre-call notification information is When those outside has become lower line of the controller to be connected to the local switch for the relationship.

Preferably, a center computer is connected to at least one of the controllers in the at least one subscriber line instead of the data communication terminal device or the another telephone. When the computer on the center side performs data communication, the subscriber line to which the computer on the center side is connected is recognized as the specific subscriber line by the relevant local exchange. ing.

Preferably, a computer at the center side is connected to at least one of the subscriber line exchanges via a subscriber line, and when the computer at the center side performs data communication, the computer at the center side is connected. The subscriber line to which the computer is connected is recognized as the specific subscriber line by the relevant local exchange.

More preferably, the center side computer is registered with a user who is a subscriber line owner who can receive the pre-call notification information and desires data communication with the center side 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 with respect to the subscriber line of the registered user, and performs the registration according to the list of access information. It is possible to perform polling on the subscriber line of the designated user.

[0012] In the first and second aspects of the invention, preferably, the telephone network further includes an incoming call to the data communication terminal device connected to a subscriber line that can receive the pre-call notification information. Incoming call management server is arranged, and the incoming call management server stores incoming call permission / prohibition information including at least a list of outgoing telephone numbers to which the data communication terminal device connected to each of the subscriber lines is permitted to receive an incoming call. A database, and the reception management server, when receiving an inquiry from the subscriber line exchange, sends out the reception permission / non-permission information relating to the called subscriber line to the subscriber line exchange, and Based on the incoming call permission / non-permission information, the line switch, if the incoming call is permitted by the associated data communication terminal device, transmits the incoming call to the subscriber line on the receiving side. It has thus delivering corresponding to specific pre-call notification information. Preferably, another telephone network independent of the telephone network is connected to the telephone network,
When a subscriber line in the another telephone network originates a call to a subscriber line in the telephone network, the subscriber's line switch on the receiving side transmits the incoming call to the subscriber line switch based on the connection information from the another telephone network. When it is recognized that the call is from a specific subscriber line in the telephone network to a specific subscriber line in the telephone network, predetermined notification information before calling is transmitted to the subscriber line on the receiving side. Has become. Preferably, the pre-call notification information comprises one of a telephone number of the telephone, a number or a code for identifying the controller, the data communication terminal device, or the another telephone.

[0013]

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

When a subscriber's line originates a call, the originating subscriber's line exchange, for example, the subscriber's line exchange 2b, transmits predetermined connection information to the destination's subscriber's line exchange, for example, the subscriber's line exchange 2a. (The telephone number of the calling subscriber's line, the telephone number of the called subscriber's line, and other information about the calling subscriber's line), and the called subscriber's line switch 2a.
If, based on the connection information, it recognizes that the incoming call is from a specific subscriber line to another specific subscriber line, it sends predetermined pre-call notification information to the called subscriber line. It is sent out. Alternatively, when each of the local exchanges 2a and 2b receives a signal indicating an incoming call to another specific local line from a specific local line connected to the local exchange, respectively, A predetermined pre-call notification information is transmitted to the subscriber line. In this case, the subscriber line exchanges 2a and 2b transmit a call to the specific subscriber line, which is input in addition to the telephone number of the subscriber line at the time of calling from the specific subscriber line. By receiving a number indicating that it is outgoing,
It recognizes that the call originates from a specific subscriber line or that the call arrives on a specific subscriber line. In the following description, the telephone number means not only the telephone number of the subscriber line, but also a number composed of the telephone number of the subscriber line and a number to be additionally input. Or
The subscriber line exchanges 2a and 2b have a list including at least the telephone number of a specific subscriber line registered in advance, and when the outgoing call or the incoming call is related to the registered subscriber line. Is recognized as an outgoing call from a specific subscriber line or an incoming call to a specific subscriber line.

In addition, the subscriber line which can receive the pre-call notification information, in this embodiment, the pre-call notification information is monitored above the telephones 4a to 4d in each of the subscriber lines 3a to 3d. Controllers 5a to 5d for controlling intermittent connection with 2a and 2b are connected. Data communication terminal devices 6a to 6c are connected to controllers 5a to 5c in parallel with telephones 4a to 4d, and another telephone 10 is connected to controller 5d in parallel to telephone 4d. Each of the data communication terminal devices 6a to 6c is, for example, a computer attached to an electricity, water, or gas meter installed in a factory, a business place, a home, or the like. The pre-call notification information is, for example, the telephone numbers of the telephones 4a to 4d or the controller 5a.
5d or data communication terminal devices 6a to 6c or another telephone set 10.

Each of the subscriber line exchanges 2a and 2b receives an incoming call (a signal indicating an incoming call) from the controller 5a to 5d or the data communication terminal device 6a to 6c or another telephone 10 connected to the incoming subscriber line. When the selection is made, the pre-call notification information is transmitted as the specific pre-call notification information.

When the pre-call notification information is the specific pre-call notification information, the controllers 5a to 5d operate the controllers 5a to 5d.
d. The data communication terminal devices 6a to 6c or another telephone set 10 connected to the local exchanges 2a and 2b are connected to each other. It connects the subscriber line exchanges 2a and 2b related to the lower lines of 5a to 5d. The controllers 5a to 5d determine whether the pre-call notification information transmitted to the subscriber line does not include valid information or the pre-call notification information is not transmitted to the subscriber line. Even when a normal paging signal is transmitted, the lower lines of the controllers 5a to 5d are connected to the associated subscriber line exchanges 2a and 2b.

Also, 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. When the center computer 8 performs data communication, the subscriber line 7 is recognized as a specific subscriber line by the subscriber line exchange 2b. The computer 8 on the center side is, for example, a computer of a meter reading or control center of an electric, water, gas or vending machine operator, or a computer of a public information center of a public organization.

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

The computer on the center side is connected to one of the controllers 5a to 5d in the subscriber lines 3a to 3d by a data communication terminal 6a to 6c or another telephone 1
It can be connected instead of 0.

The telephone network 1 further includes 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. Is done. The incoming call management server 9 includes a database 9a that stores incoming call permission / prohibition information including at least a list of outgoing telephone numbers to which the data communication terminal devices 6a to 6c connected to the subscriber lines 3a to 3d are allowed to receive incoming calls. I have.

The incoming call management server 9 is a subscriber line exchange 2
When it receives an inquiry from the subscriber line exchanges 2a and 2b, it transmits incoming call permission / non-permission information relating to the subscriber's line on the receiving side. And the subscriber line exchange 2a,
2b, based on the incoming call permission / prohibition information, when the incoming call is permitted by the related data communication terminal device, the corresponding pre-call notification information is transmitted to the subscriber line on the receiving side. I have. Now, for example, the telephone number of the data communication terminal device 6c and the center of the center of the data communication terminal device 6c are set in the list of incoming call permission / prohibition information stored in the database 9a as the outgoing telephone numbers for which the data communication terminal device 6a connected to the subscriber line 3a permits the incoming call. If the telephone number of the computer 8 on the side 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 local exchange 2a sends corresponding pre-call notification information to the subscriber line 3a on the receiving 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 incoming subscriber's line 3a.

The telephone network 1 can be connected to another telephone network independent of the above (international telephone network, portable mobile telephone network, telephone network using CATV, the Internet, etc.). In this case, when a subscriber line in another telephone network makes a call to the subscriber line of the telephone network 1, the subscriber line exchange 2 on the receiving side
a, 2b, based on the connection information from another telephone network, when recognizing that the incoming call is from a specific subscriber line in another telephone network to a specific subscriber line in the telephone network 1, Transmits predetermined pre-call notification information to the called subscriber's line.

In this communication system, the data communication terminal device 6c (originating data communication terminal device) connected to a specific subscriber line 3c is connected to the data communication terminal device 6a connected to another specific subscriber line 3a. Let us consider a case where a call is transmitted to (an incoming data communication terminal device). The originating subscriber's line switch 2b, when the subscriber's line 3c makes a call,
Predetermined connection information is transmitted to the subscriber line exchange 2a on the receiving side. The receiving-side local exchange 2a recognizes that the incoming call is from the specific subscriber line 3c to the specific subscriber line 3a, based on the connection information from the calling-side local exchange 2b. .

Next, the subscriber's line exchange 2a on the receiving side makes an inquiry to the incoming call management server 9, and the incoming call management server 9
From the subscriber line 3a on the receiving side. Then, the subscriber line exchange 2a determines whether or not to make the subscriber's line 3a receive a call, based on the reception permission / prohibition 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, it transmits the pre-call notification information to the subscriber line 3a.

Thus, the subscriber line exchange 2a first transmits an activation signal to the subscriber line 3a on the receiving side. In response to this start signal, controller 5a once disconnects the lower telephone set 4a, and sets
Sends a (primary) response signal to a. Upon receiving the primary response signal, the subscriber line exchange 2a sends the pre-call notification information to the subscriber line 3a on the receiving side. In this case, the pre-call notification information selects the controller 5a connected to the called subscriber's line 3a or the called data communication terminal 6a connected thereto (the controller 5a or the called data communication terminal). 6a). Therefore, the local exchange 2a sends the pre-call notification information as the specific pre-call notification information.

The controller 5a responds to the notification information before the specific call by connecting the called-side data communication terminal device 6a (without connecting the controller to a lower line) to the local exchange 2a. And sends an information reception completion signal to the local exchange 2a.
Responds to this signal in response to this signal.
To send a call signal. Receiving side data communication terminal device 6a
Responds to this call signal (secondarily), data communication is performed between the calling side data communication terminal device 6c and the called side data communication terminal device 6a. This data communication can be performed simultaneously or sequentially between one originating data communication terminal and a number of destination data communication terminals.

The communication and data communication between the specific subscriber lines are also performed between the subscriber lines 3a and 3b, that is, the specific subscriber line on the calling side and the specific line on the called side. The same applies to the case where 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 subscriber lines 3a to 3c according to a list of access information on the subscriber lines 3a to 3c registered by the user. Polling can be performed without ringing the associated telephones 4a-4c. 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 each of the data communication terminal devices 6a to 6c about the presence or absence of a data transmission request, and permits data transmission to the data communication terminal device having the transmission request. On the other hand, each of the data communication terminal devices 6a to 6c unconditionally receives data transmitted from the computer 8 on the center side.

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

The subscriber line exchange 2a on the receiving side recognizes that there is an incoming call from the specific subscriber line 3d to the specific subscriber line 3a based on the connection information. In this way, the subscriber line exchange 2a on the receiving side firstly receives the subscriber line 3 on the receiving side.
A start signal is sent to the controller 5a connected to the controller 5a. In response to this start signal, controller 5a disconnects terminating telephone 4a once, and switches local telephone exchange 2a.
A (primary) response signal is transmitted to the Upon receiving the response signal, the subscriber line exchange 2a sends the pre-call notification information to the subscriber line 3a on the receiving side. in this case,
The pre-call notification information includes an identification number (identification code) of the telephone 10.

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

FIG. 2 is a schematic diagram showing an overall configuration of a communication system according to another embodiment of the present invention. This example is
In the embodiment shown in 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 before the call by the controller 5a and 5c. A higher-level controller 5a ', 5c' for monitoring information and controlling connection and disconnection with the subscriber line exchanges 2a, 2b is connected. Therefore, in FIG. 2, the same components as those in the embodiment of FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 2, the upper controller 5
a ′ and 5c ′ respectively have lower-level controllers 5a,
5c in parallel with another data communication terminal device 6a ', 6
c 'is connected. And the controllers 5a, 5a ',
5c, 5c 'indicate that the pre-call notification information is the controller 5a, 5c'.
a ', 5c, 5c' or the pre-specific call notification information for selecting the data communication terminal devices 6a, 6a ', 6c, 6c' connected to the controller 5a, 5c, 5c '.
Data communication terminal device 6 connected to a ', 5c, 5c'
a, 6a ', 6c, 6c' to the local exchanges 2a, 2b.
When the pre-call notification information is other than the above, the lower lines of the controllers 5a, 5a ', 5c, 5c' are connected to the subscriber line exchanges 2a, 2b. I have.

When a telephone (calling telephone) 4b connected to a specific subscriber line 3b makes a call to a telephone (receiving 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.
A start signal is sent to c. The upper controller 5c 'is set not to respond to this activation signal, and the lower controller 5c temporarily disconnects the lower telephone 4c and transmits a primary response signal in response to this activation signal. Upon receiving this response signal, the local exchange 2b sends out pre-call notification information (calling telephone number). Upper controller 5
c ′ and the lower-level controller 5c recognize that the pre-call notification information is not the specific pre-call notification information, and
b is connected to the called telephone 4c, and the lower-level controller 4c sends a pre-call notification information reception completion signal to the local exchange 2b. Subsequent operations are the same as in the embodiment of FIG.

The data communication terminal device 6b connected to the specific subscriber line 3b transmits a call to the data communication terminal device 6c of the lower controller 5c connected to the specific subscriber line 3c to perform data communication. Then, in the same manner as in the embodiment of FIG. 1, the originating subscriber's line exchange 2a sends predetermined pre-call notification information to the destination's subscriber line exchange 2b, The exchange 2b recognizes that there is an incoming call 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 permission information. The subscriber line exchange 2b determines whether or not to make the subscriber's line 3c receive a call, based on the reception permission / non-permission information. Then, if the data communication terminal device 6c connected to the subscriber line 3c permits the incoming call from the data communication terminal device 6b, it transmits the pre-call notification information to the subscriber line 3c.

Thus, the local exchange 2b sends an activation signal to the subscriber line 3c. At this time, the upper controller 5c 'of the subscriber line 3c connects to the lower line, that is, the controller 5c without responding to the start signal, and the lower controller 5c transmits the lower line to the telephone 4c of the lower line. Disconnect and send a primary response signal. (The lowest controller always responds to the start signal from the local exchange.)

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

The upper controller 5c 'joins the lower line because 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. Connected to the local exchange 2b.
The lower-level controller 5c recognizes this information as the notification information before the specific call for selecting the controller 5c or the data communication terminal 6c connected thereto, and sets the data communication terminal 6c to the subscriber line. It connects to the exchange 2b and sends out an information reception completion signal to the subscriber line exchange 2b. In response to this signal, the local exchange 2b sends a calling signal to the data communication terminal 6c. When the data communication terminal device 6c makes a secondary response to the call signal, data communication is performed between the data communication terminal device 6b and the data communication terminal device 6c.

As in the case of the data communication between the data communication terminals, the computer 8 on the center side connects the data communication terminals 6a, 6a ', 6c, 6c connected to the subscriber lines 3a, 3c. , Data communication can be performed simultaneously or sequentially without ringing the associated telephones 4a, 4c.

[0041]

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. The data communication can be efficiently performed using the idle time, and a large additional capital investment is not required.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an overall configuration of a communication system according to one 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]

 DESCRIPTION OF SYMBOLS 1 Telephone network 2a, 2b Subscriber line switch 3a-3f Subscriber line 4a-4f Telephone 5a-5d Controller 6a-6c Data communication terminal device 7 Subscriber line 8 Center computer 9 Incoming call management server 9a Database 10 Another Telephone

Claims (9)

[Claims] 1. A telephone network, a plurality of local exchanges arranged in the telephone network, and at least one telephone connected to each of the plural local exchanges via a subscriber line. When the subscriber line originates, the originating local line exchange sends predetermined connection information to the receiving side local line exchange, and the receiving side local line exchange Based on the connection information, when it is recognized that the incoming call is from a specific subscriber line to another specific subscriber line, predetermined call notification information is transmitted to the called subscriber line. A controller for monitoring the pre-call notification information above the telephone on the subscriber line that can receive the pre-call notification information, and controlling disconnection of the connection with the subscriber line exchange. Is connected to the controller A data communication terminal device or another telephone is connected in parallel to the telephone, and the called subscriber's line switch, the incoming call, the controller connected to the called subscriber line or the controller or the When selecting a data communication terminal device or the another 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, transmits the data communication connected to the controller. A terminal device or the another telephone is connected to the subscriber line exchange on the receiving side, but when the pre-call notification information is not the specific pre-call notification information, a lower line of the controller and the receiving side are connected. A communication system for connecting a subscriber line exchange. 2. A telephone network comprising: a telephone network; at least one local exchange installed in the telephone network; and a plurality of telephones connected to the local exchange via respective subscriber lines. When receiving a signal indicating an incoming call from a specific subscriber line connected to the relevant local exchange to another specific local line, A predetermined pre-call notification information is transmitted, and the pre-call notification information is monitored above the telephone on the subscriber line that can receive the pre-call notification information, and the pre-call notification information is transmitted to the subscriber line exchange. A controller for controlling disconnection of the connection is connected, and a data communication terminal device or another telephone is connected to the telephone in parallel with the controller, and the local exchange has a signal indicating the incoming call, Subscription of the called party When selecting the controller or the data communication terminal device or the another telephone connected to the user line, the pre-call notification information is transmitted as specific pre-call notification information, When the pre-call notification information is the specific pre-call notification information, the communication device connects the data communication terminal device or the another telephone connected to the controller to the subscriber line exchange, If the notification information is not the specific pre-call notification information, the communication system connects a lower line of the controller and the subscriber line exchange. 3. The at least one of the subscriber lines to which the controller is connected, monitors the pre-call notification information above the controller, and connects to the relevant subscriber line exchange. Connected to at least one higher-level controller for controlling the intermittent operation of the upper-level controller,
Another data communication terminal device or another telephone is connected in parallel to the lower-level controller, and the controller transmits the pre-call notification information to the controller or the data communication terminal device connected thereto. Or, when the information is the specific pre-call notification information for selecting another telephone, the data communication terminal device or the another telephone connected to the controller is connected to the relevant local exchange, 3. The communication system according to claim 1, wherein when the notification information is other than the above, a lower line of the controller is connected to the relevant local exchange. Communications system. 4. A computer at a center side is connected to at least one of the controllers in at least one of the subscriber lines, instead of the data communication terminal device or the another telephone, When the side computer performs data communication, the subscriber line to which the center side computer is connected is recognized as the specific subscriber line by the relevant local exchange. The communication system according to claim 1. 5. A center-side computer is connected to at least one of the subscriber line exchanges via a subscriber line, and the center-side computer performs data communication when the center-side computer performs data communication. The communication system according to any one of claims 1 to 3, wherein the subscriber line to which the subscriber line is connected is recognized as the specific subscriber line by the relevant subscriber line exchange. . 6. The center computer is registered with a user who is a subscriber line owner who can receive the pre-call notification information and desires data communication with the center computer. The computer on the center side has a list of access information including at least a telephone number of the data communication terminal device regarding the subscriber line of the registered user, and according to the list of access information, 6. The communication system according to claim 4, wherein polling can be performed on a subscriber line of the user. 7. The incoming call management server for managing incoming calls to the data communication terminal device connected to a subscriber line capable of receiving the pre-call notification information, wherein the incoming call management server is provided in the telephone network. Comprises a database storing incoming call permission / non-permission information including at least a list of outgoing telephone numbers to which the data communication terminal device connected to each of the subscriber lines is permitted to receive a call. When an inquiry is received from a local exchange,
Sends the call acceptance / rejection / non-acceptance information relating to the subscriber's line on the receiving side to the subscriber's line exchange, and the subscriber's line exchange includes:
Based on the incoming call permission / prohibition information, if the incoming call is permitted by the relevant data communication terminal device, the corresponding pre-call notification information is transmitted to the subscriber line on the receiving side. The communication system according to claim 1, wherein: 8. The telephone network is connected to another telephone network independent of the telephone network. When a subscriber line in the another telephone network transmits a call to a subscriber line in the telephone network, a call is received. The local exchange, based on the connection information from the another telephone network, determines that the incoming call is from a specific subscriber line in the another telephone network to a specific subscriber line in the telephone network. The communication system according to any one of claims 1 to 7, wherein upon recognition, predetermined pre-call notification information is transmitted to the called subscriber's line. 9. The method according to claim 1, wherein the notification information before calling comprises one of a telephone number of the telephone, a number or a code for identifying the controller, the data communication terminal device, or the another telephone. The communication system according to any one of claims 1 to 8, wherein: