JPS62118670A - Network controller capable of repetitive call - Google Patents

Abstract

PURPOSE:To simplify the control of a network controller from a terminal equipment of a CPU by controlling an automatic dialing part by a telephone dial schedule control section according to a prescribed schedule so as to send a number stored in a telephone number setting storage section to a line as a dial signal. CONSTITUTION:When a data communication terminal equipment 9 outputs a call request signal to a network controller 7, the network controller 7 receives the signal to start an automatic dialing section 74 thereby applying dial start to a line 4. When a telephone exchange 1 is started, the automatic dial section 74 uses a telephone number transmission/reception circuit 742 to read an opposite telephone number stored in a telephone number setting and storage section 75 and sends each digit of the number to the telephone exchange 1 through the line 4 sequentially via a dial signal sending circuit 743. In this case, the transmission/reception of the signal between the telephone number setting storage section 75 and the automatic dial section 74 or among the circuits 741, 742, 743 in the automatic dial section 74 is executed under the control of a telephone dial schedule control section 76.

Description

[Detailed Description of the Invention] [Summary] A data communication terminal device for a data communication system such as a remote data collection system in which a central data processing unit is connected to a large number of data communication terminal devices via a telephone line network and collects data. Alternatively, an automatic dialing section, a telephone number setting storage section, and a telephone dialing schedule control section are provided in a network control device that is installed in the central data processing unit and handles calls from and to the data communication terminal device or the central data processing unit, and automatically sends dialed numbers. In this system, all line connection control etc. are performed by the network control equipment, and when making a call, the central data processing unit, which is a data communication terminal equipment, simply sends a call request to the network control equipment. Based on the above call request, the network controller automatically calls according to the phone number stored in the network controller, and if the connection is not successful,
The connection attempt will be made repeatedly. For this reason, the data communication terminal device or central data processing device leaves all outgoing calls to the network control device, eliminating the need for any complicated control.

[Industrial application field]

The present invention relates to a network control device capable of repeatedly transmitting light, and more specifically, to a remote data processing device in which a central data processing device is connected to a large number of data communication terminal devices via a telephone line network and transmits data. It is installed in a data communication terminal device or central data processing unit of a data communication system, such as a system, and is connected to the arrival and departure of the data communication terminal device or central data processing unit. relates to a network control device that can automatically and repeatedly transmit light.

[Prior Art] A remote data reporting system, such as a centralized meter reading system, is a system in which a central data processing unit (seven terminals) is connected to a large number of data communication terminals (terminals) and each other via a telephone line network. ], an inexpensive system is constructed using a transmission line with pay-as-you-go rates.Each device must be connected to a telephone line to control outgoing and incoming connections, so-called network control. Therefore, a network control device is indispensable.In other words, when a connection request is made from a data communication terminal device to a central data processing device (center device), a network control device is indispensable. An automatic originating/terminating network control device is required that is capable of automatic dialing, which repeats dialing attempts when a connection fails, and automatic call receiving.

In the figure, 1 is a telephone exchange, 2 is a center side device, 3 is a terminal side device, 4 is a telephone line, 5 is a telephone, 6 is a converter,
7 is a network control unit (NCU), B is a modem, 9 is a data communication terminal, 10 is a sensor, 11 is a central data processing unit (CPU), 12 is an input device, and 13 is an output device.

As can be easily understood from the figure, a center side device 2 and a large number of terminal side equipment R3 are connected to a telephone line network composed of a telephone exchange 1 and telephone lines 4. The center equipment 2 and the terminal side device 3 are both devices for performing data communication, and the center side device 2 is connected to the network control device 7 (N
CU), modem 8 (MODEM), central data processing unit 11C (CPU), input device 12, and output device 13t. The terminal side/f6 is the network control device 7 (N
ctr) s modem equipment ta (uonx:y), data communication terminal equipment 9ft included. Note that the telephone line 4 is switched and connected to the terminal side device 3 and the telephone set 5 by a converter 6. Note that 10 is o6, for example, an alarm switch or a measuring meter.
Seed sensor.

This remote data processing system operates as follows.

The terminal device 3 causes the data communication terminal device 9 to communicate with the network control device 7 in response to a signal (transmission request) from the sensor 10 connected to the data communication terminal device 9 of the terminal device 3. Control is performed to initiate a telephone call to call No. 2.

Based on this, the center side device 2 performs automatic incoming call connection processing, and the terminal side device 3 and the center side device 2 are connected via the telephone line network (telephone line 4 and telephone exchange 1). After completion, data communication is performed between the terminal side device 3 and the center side device 2, and the signal from the sensor 10 is transmitted to the central data processing device 11.

Further, the center side device 2 may periodically automatically call the terminal device 3 via the telephone line network (telephone line 4 and telephone exchange 1) to perform data communication. In this case, the network control device 7 of the center equipment @2 automatically makes the call, and the network control device 7 of the terminal side device 3 71c automatically receives the call. The entire system is operated in this manner.

FIG. 4 is a block diagram showing the interface relationship of the network control device of the terminal side device 5 according to the prior art.

FIG. 4 shows the terminal side device 3 as a whole5.
4.7.8.9 corresponds to FIG.

Note that 71 is a connection (CML) relay, 72 is a loop closing circuit, 73 is an incoming call signal (16Hz) detection circuit, and 7
4 is an automatic transmitter, 9j5741 is its response monitoring circuit, 7
42 is a telephone number transmitting/receiving circuit, 743 is a dial (pulse) signal transmitting circuit, and 77, 7B, and 79.791 are signal lines, respectively.

First, in the case of an incoming call, the incoming call signal input from line 4 (1
6H) reaches the incoming call signal detection circuit 73 via the contact of the connection (CML) relay 71. When the circuit 73 detects the incoming call signal, it converts it into a CI multiplied signal and transmits it to the data communication terminal device 9 via the modulation/demodulation device 8t- to activate it. The connection of the network control device 7 (
CML) relay 71 is activated, line 4 is connected to data communication terminal device 9 via modem 8, and data communication can be performed with the other party by completing necessary procedures.

Next, the operation of automatic calling will be explained.

When the data communication terminal device 9 is activated by, for example, the sensor it accommodates (see FIG. 10) and outputs a call request signal to the network control device 7 via the signal line 79, the network control device 7 Upon receiving the signal, the automatic transmitter 74 is activated,
A call is activated for line 4. When the SIMI switch is activated by this, the automatic transmission unit 74 sends a number request signal to the data communication terminal device 9 via the signal Hyq2. The data communication terminal device 9 confirms the number request signal and sends the first digit of the telephone number of the center side device (2) via the signal line 79.

This number information is transmitted to the telephone number transmitting/receiving circuit 7 of the automatic calling section 74.
42, from which it is transmitted to a dial (pulse) signal sending circuit 743, and from this sending circuit 745 a connection (C
ML) Relay contact and line 4'f.

and then sent to the telephone exchange (1).

After the transmission of the dial (pulse) signal for the above number is completed, the automatic transmission section 74 sends a number request signal requesting the next digit number to the data communication terminal device 9.

By repeating the above operation, when the data communication terminal device 9 completes sending out the number information of the required digits, it outputs a number end signal, and the automatic transmission section 74 receives this number end signal and its response monitoring circuit 741 to monitor the called party's response.

When the called party response is detected, the network control device 7 converts it into a CI-multiplied signal and sends it to the modulation/demodulation device 8, and thereafter starts data communication in the same manner as in the case of the above-mentioned incoming call.

As mentioned above, conventionally, in this type of system, the data communication terminal device stores the telephone number of the other party, and
It also controlled the timing of the called party's response (the time from the end of sending the number to the called party's response).

Furthermore, the automatic call operation does not necessarily result in a successful connection in one attempt; it may be necessary to retry several times depending on the line condition, and the control of this retry operation is also the responsibility of the data communication terminal device. was running.

[Problem to be solved by the invention]

As described above, conventionally, when performing an automatic outgoing connection, the data communication terminal device memorizes the other party's telephone number and provides this information to the network control device, and sets the waiting time (several tens of seconds) for monitoring the other party's response. , within 50 seconds), connection retries were also controlled on the data communication terminal side, so when making an automatic call, each digit of the other party's phone number was transferred between each digit and the network control equipment, and the complications involved. control signals must be exchanged, the data communication terminal must wait for a long period of time (approximately 50 seconds) to monitor the other party's response, and when making an automatic call, If the connection is not completed, there are problems such as the fact that the data communication equipment side has to carry out the control for repeating and retrying the connection, which complicates the structure of the data communication terminal equipment in this type of system, and also makes it difficult to control the network. There has been a problem in that receiving and receiving signals with the device is also complicated. Incidentally, in the center side device, a similar problem occurs between the central data processing device 11 and the network control device 7.

The present invention solves the above-mentioned problems, simplifies the control of the network control device from the data communication terminal device or central data processing unit (CPV) side, and connects the data communication device or central data processing unit (CPV) to the network. The aim is to rationalize system design by providing a network control device in which the functions of the control device are rationally divided into two parts.

[Means for solving problems]

According to the present invention, the above-mentioned problems can be solved in a data communication system such as a remote data processing system in which a central data processing unit is connected to a large number of data communication terminal devices via a telephone line network and performs data processing. In a network control device that is installed in a data communication terminal device or a central data processing device and handles calls from and to the data communication terminal device or central data processing device, an automatic calling section, a telephone number setting storage section, and a telephone calling schedule control section are provided. The telephone call schedule control unit is activated based on a call instruction from the data communication terminal device or the central data processing unit, and the telephone call schedule control unit controls the automatic call unit according to a predetermined schedule. The number stored in the telephone number setting storage unit is sent to the line as a dial (pulse) signal, and if the connection to the other party is successful, the data communication terminal device or central data processing unit starts data communication with the other party. If the call is initiated but is unsuccessful, the problem is solved by the telephone calling schedule control section controlling the automatic calling section to repeatedly attempt the connection.

〔Example〕

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

FIG. 1 is a block diagram showing the relationship between the network control devices and the network controllers embodying the present invention, and the entity in FIG. 1 corresponds to the terminal side device 3 (FIG. 5).

The numbers in FIG. 1 represent those corresponding to FIG.

In FIG. 1, a telephone number setting storage section 75 and a telephone call schedule control section 76 are added to the network control device 7 of FIG. 4. Although not clearly shown in the figure, the data communication terminal device 9 is not provided with a storage device for the telephone number of the other party.

The incoming call operation in the terminal equipment 5 according to the present invention shown in FIG. 1 has already been explained and is the same as that shown in FIG. 4, so the explanation will be omitted.

Next, the automatic calling operation will be explained. At this time, it is assumed that the terminal side device 3 automatically makes a call to only one center side device.

When the data communication terminal device 9 is activated to make a call by, for example, a sensor (see 10 in FIG. 3) housed therein and outputs a call request signal to the network control device 7 via the signal line 79, the network control device 7 receives the above-mentioned signal. Upon receiving this, the automatic calling unit 74 is activated, and a call is activated to the line 4. As a result, when the SIMI telephone exchange (RI) is activated, the automatic calling section 74 sends the telephone number of the other party (in this case, the center side device) stored in the SIMI telephone number setting storage section 75 to the telephone number transmitting/receiving circuit 742. Number f: Reading, dial (pulse) signal sending circuit 7
43, each digit of the number is sent to line 4 in turn to switchboard 1.
Send to. After the number transmission is completed, the response monitoring circuit 741 monitors the called party's response.

When the called party response is detected, the network control device 7 sends it as a CI-multiplied signal to the modulation/demodulation device 8, and starts data communication with the other party in the same way as in the case of receiving a call in FIG.

In the above automatic call, the reception of signals between the telephone number setting storage unit 75 and the automatic call unit 74, and also between the circuits 741, 742, and 743 in the automatic call unit 74 is controlled by the call schedule control unit 760. It is received and done.

Note that if the connection is not successful after one automatic call operation, the telephone call schedule control unit 76 controls the
Repeated automatic dialing attempts.

FIG. 2 is an operation flow diagram according to an example of a schedule including retrying of a telephone call according to the present invention.

Suppose that it is moved. Then, the already explained stage S
-1, automatic dialing is performed. Next, the process moves to step S-2, where the called party's response is monitored, and if the called party responds within the response monitoring waiting time (50 seconds), the branch goes to YES, the connection is completed, data communication is performed, and the line is released after completion. , a series of data communications ends.

If there is no response from the called party within the specified response monitoring waiting time in step S-2, the process branches to step Fl-3, where it is determined whether the number of retries exceeds two, and if the number of retries exceeds two, If not, the process branches to step S-4 (No), starts a re-call interval timer, and after one minute has elapsed, returns to step S-1 to retry automatic dialing.

If it is determined in step S-5 that the number of retries exceeds 2, YES branches to multi-step S-S, activates a re-call cancellation timer, and returns to step S-1 after 20 minutes to automatically dial. Retry the call.

When the telephone call schedule control unit 76 receives a call request, it schedules the operation of the automatic call unit 74 to perform the above-mentioned automatic call call, and also controls the number of times when the connection is not successful after - number of attempts. When this happens, it controls the execution of the schedule shown in FIG. 2, notifies the data communication terminal device 9 only when the connection of the line is completed, and performs data communication with the other party as described above.

Although one embodiment of the present invention has been described above, various modifications can be made within the technical scope thereof.

For example, the telephone number of the other party to be connected is transferred from the data communication terminal device 9 to the network control device 7 in advance, and the telephone number (set and stored in the setting storage section) is stored in the setting storage section. You can leave it at that time.

Although the case where there is only one telephone call destination has been described, the present invention can be easily applied to a case where there is a plurality of telephone call destinations.

〔Effect of the invention〕

According to the present invention, since the telephone number of the called party is secured in the telephone number setting storage section of the network control device, the telephone number can be exchanged between the network control device and the data communication terminal device or the central data processing device. There is no need to transfer or exchange information, and the telephone call schedule control section of the network controller
The data communication terminal device is notified only when the telephone call sequence shown in the figure is performed and the called party answers and the connection is completed. It is now possible to know the completion of a connection using a simple signal format, which has the effect of making the transmission and reception of signals between the network control device and the data communication terminal device extremely simple and clear. In addition, since the above-mentioned data communication terminal device is completely free from network control in the original sense, it is possible to eliminate the hassles such as complicated signal exchange, long monitoring waiting time, and call retries. This has the effect of allowing the overall system to be designed rationally.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing the ink-face relationship of a network control device implementing the present invention, Fig. 2 is an operation flow diagram based on a schedule including retries of telephone calls in the present invention, and Fig. 3 is a diagram showing a known remote data output. FIG. 4 is a block diagram showing the interface relationship of a network control device according to the prior art. DESCRIPTION OF SYMBOLS 1...Telephone exchange, 2...Center side device, 3...Terminal side device, 4...Telephone line, 5...Telephone, 6...Converter, 7...Network control device , 71... CML ri - , 72...
・Loop closure circuit, 73...Incoming call signal (16Hz) detection circuit, 74・
...Automatic calling unit, 741...Response monitoring circuit, 742...Telephone number transmission/reception circuit. 743...Dial (pulse signal sending circuit, 75...
...Telephone number setting storage unit, 76...Telephone call schedule control unit. 77.78.79.791...Signal line, 8...Modulator/demodulator, 9...Data communication terminal device, 10...Sensor patent applicant Fuji Electric Co., Ltd. (1 other person) Representative patent attorney Tamamushi Kugobe (2 others) Figure 2 Block diagram of a publicly known remote data vote counting system Figure 3

Claims (1)

[Claims] Data communication terminal equipment or central data processing of a data communication system such as a remote data collection system in which a central data processing unit is connected to a large number of data communication terminal equipment via a telephone line network and collects data. A network control device installed in the data communication terminal device or central data processing device that handles calls from and to the data communication terminal device or central data processing device, comprising an automatic calling section, a telephone number setting storage section, and a telephone calling schedule control section, Based on a calling instruction from the central data processing unit, the telephone calling schedule control section is activated, and the telephone calling schedule control section controls the automatic calling section according to a predetermined schedule and stores the telephone number setting in the telephone number setting storage section. The number sent to the other party is sent as a dial (pulse) signal to the line, and if the connection to the other party is successful, the data communication terminal device or central data processing unit starts data communication with the other party, but if it is not successful, the above telephone call is sent. A network control device capable of making repeated calls, characterized in that a call schedule control unit controls an automatic calling unit to repeatedly attempt the above connection.