JPH0330562A - Additional equipment for terminal side network controller - Google Patents

Abstract

PURPOSE:To load data showing a socket is drawn out on an ascending telegraphic message without fail and to shorten time for communication when the socket is not drawn out by passing the telegraphic message as it is when a gas meter sends the ascending telegraphic message and the socket is not drawn out, once reading the message into a data memory and loading information showing the socket is drawn out on the ascending telegraphic message when the socket is drawn out. CONSTITUTION:When the communication is executed from a center side equipment 1 to terminal side equipments 7 and 8, an additional equipment 17 decodes the control code of the telegraphic message coming from the center equipment through a T-NCU 6. When the control code is a meter reading data request, for example, the additional equipment 17 decides it by a socket draw-out deciding means 17a at first whether the socket of the terminal equipment (such as a gas leakage alarm 8, for example) is drawn out or not. When a descending telegraphic message from the T-NCU 6 is a meter-reading request and the socket of the gas alarm as the terminal side equipment 8 is not drawn out as the result of decision by the socket drawout deciding means 17a, the descending telegraphic message is transmitted to the meter 7 by a half through sending means 17b and afterwards, the telegraphic message (meter-reading data) from the meter 7 is transmitted to the T-NCU 6 by a complete through sending means 17c.

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of Industrial Application> The present invention relates to an additional device for a terminal-side network control device in an automatic data communication system using subscriber telephone lines.

<Prior Art> There are two types of automatic data communication systems in which data memory communication is performed between a terminal side device and a center side device via a telephone line: a terminal calling communication method and a no-ringing communication method.

In the terminal call communication system, when a terminal device such as a meter makes a call through an additional device (ADP), the terminal network control unit (T-NCU) sends a selection signal to the exchange, and the center network control device (hereinafter referred to as C-NCU) is called and performs data communication.

In the no-ringing communication method, a no-ringing trunk is installed at the exchange that accommodates the terminal side equipment, the no-ringing trunk is called and held once from the center side, and then,
The no-ringing trunk selects the telephone line to which the terminal equipment is connected, and reverses the polarity of the telephone line.
z is insensitive to the health of the home telephone other than the calling signal, and calls the terminal-side network control device by sending out a certain AC signal, and communicates to the terminal-side device such as a meter through the additional device (AD+).

At this time, for example, a terminal side device such as a gas leak alarm is connected to the additional device (ΔD P ), and its 7u source (AClo
oV) is not applied (the outlet was disconnected)
In such a case, the meter reading data includes data indicating that the alarm is unplugged and is sent as a notification. This is known as the Postal Service recommended message format.

<Problem to be Solved by the Invention> In the above case, when the alarm of the terminal side device connected to the additional device (ADP) is unplugged, for example, when the additional device receives the upstream message (meter reading data) from the meter, T-NC
If you let U pass through as it is (completely through), you will not be able to send data from the unplugged outlet.

Furthermore, if the additional device always reads the data into the Kazumi data memory and then sends it out (C-to-through), when there is no need to send information about unplugging the outlet, the communication time becomes longer than necessary.

In view of the above-mentioned problems, the present invention provides that when receiving an F-request message (meter reading request message) from T-N CtJ, i''-N
The purpose of the present invention is to provide an additional device that can reliably include data on unplugged outlets in the upstream message (meter reading data) to a CU, and can shorten communication time when there is no unplugged outlet.

Means for Solving the Problems> The means for solving the problems according to the present invention, as shown in FIGS. In an automatic data communication system that uses a no-ringing trunk 5 connected to an exchange to perform data communication by connecting a terminal-side network control device 6 without causing a home telephone 9 to ring, the terminal-side devices 7 and 8 and the terminal An additional device 17 interposed between the side network control device 6 and the outlet disconnection determination means 17a, which determines whether or not the information from the terminal side devices 7 and 8 includes information about an unplugged outlet; A half-through sending means 17b that once reads the upstream message from the terminal side device 7.8 based on the unplugged outlet detection signal from the unplugged outlet determination means 17a, adds unplugged information and sends it, and unplugged outlet II.
Complete through transmission means 17c is provided for allowing the upstream message from the terminal side device 7.8 to pass through as is without any unplugging signal from the power supply determining means 17a.

In the automatic data communication system according to the problem solving means described above, data communication is performed by making terminal calls from the terminal devices 7 and 8, or by using the no-ringing trunk 5 connected to the switchboard 4 of the central telephone office. To connect a terminal side network control device 6 and perform data communication without ringing a telephone 9.

At this time, for example, from the center side device 1 to the terminal side device 7.
8, the additional device 17 decodes the control code of the message sent through the center-side device T-NCU 6. When the control code is, for example, a meter reading data request, the additional device I7 first determines whether or not the outlet of the terminal side device (for example, the gas leak alarm 8) is disconnected by the outlet disconnection determining means +7a.

Then, it sends a message requesting meter reading data to another terminal device 7 (for example, a gas meter) and waits for an upstream message (meter reading data) from the gas meter 7.

When the gas meter 7 sends an upstream message, if the outlet is unplugged, "complete through" is performed to allow the message to pass through.

When there is an unplugged outlet, a "half-through" operation is performed in which the unplugged information is read into the data memory and transferred to the upstream message.

<Actual Sparrow Example> Hereinafter, one embodiment of the present invention will be described based on FIGS. 1 to 8.

FIG. 1(a) is a configuration diagram of an automatic data communication system according to the present invention, FIG. 1(b) is a functional block diagram of an additional device, and FIG.
The figure is a control flowchart of the additional device of the terminal-side network control device, and FIG.
), and FIG. 4 is a block diagram of the main control device of the additional device.

Figures 5 and 6 are diagrams showing an example of the format of a downstream message sent from the center side to the attached device through the T-NCU, and Figure 7 is a diagram showing an example of the format of a downstream message sent from the center side to the center side device through the T-NCU. FIG. 8 is a diagram showing an example of the structure of one character of the message format.

First, to show the schematic configuration of the automatic data communication system according to the present invention, in FIG. 1, l is a host computer, 2 is a center side network control unit (C-NCU), and 3 is a switching center connected to the center side (LS), 4 is a switching center (LS) connected to the terminal side. 5 is a no-ringing trunk used in the original no-ringing trunk. 6 is a terminal side network control unit (T-NCU), and 7.8 is a terminal side device, which includes a gas meter, a gas leak alarm, etc. 9 is the home phone, 10, II is the connection line, 12.13 is the telephone line, 1
4 is an interoffice trunk line, and I5.16 is an interface line between the exchange 4 and the no-ringing trunk 5.

This automatic data communication system performs data communication by making a terminal call from the terminal side device 7-8, or by using a no-ringing trunk 5 connected to the exchange 4 of the central office without causing the home telephone 9 to ring. The terminal side network control device 6 is connected to perform data communication.

In this automatic data communication system, the terminal side device 7.
An additional device (ADP) +7 is interposed between the terminal-side network control device 8 and the terminal-side network control device 6, to which, for example, a pulse meter or a gas alarm can be connected, and to expand the range of application as a system.

As shown in FIG. 3, the additional device 17 includes an interface circuit 21 connected to the terminal-side network control device 6, and a terminal-side device 7.
8, and a main controller 24 connected to these interface circuits 21, 22, and 23. In FIG. 3, 25 is a power supply circuit, 26 is an oscillation circuit, and 27 is a reset circuit.

FIG. 4 is an internal configuration diagram of the main control device 24 in the additional device +7, which includes a CPU 31 that is a central control unit, a timer counter 33 that inputs a signal from an oscillation circuit 32 and measures time, and a program that instructs the CPU 31 to control. memory 34
, a data memory 35 that temporarily holds data generated internally, and an interface ([10) 36 that connects the main controller 24 with the outside.

As shown in FIG. 1(b), this additional device I7 includes an outlet disconnection determining means +7a for determining whether or not the information from the terminal device 7.8 includes disconnection information, and an outlet disconnection determining means 17a. The half-through sending means 17b reads the upstream message from the terminal side device 78 once into the data memory and sends it out after adding the outlet disconnection information when the outlet is unplugged signal by the outlet disconnection detection means 17a, and the terminal side when the outlet unplugged signal is detected by the outlet disconnection determination means 17a. -L from device 7.8
Completely through sending means 17c that allows the message to pass through as is.
and is provided.

That is, when the additional device 17 receives a downstream message such as the one shown in the example of FIG. 5 or FIG. A device that determines whether the alarm is disconnected from the outlet and automatically switches between "half-through" and "full-through" modes for the upstream message (meter reading data) from the gas meter as the terminal side device 7, based on the result. It is.

FIG. 7 shows an example of the format of an upstream message from a terminal device. For example, information such as an unplugged outlet is written as part of the "information" character in the diagram.

Figure 8 is a diagram showing the configuration of one character of an upstream or downstream message, such as start bit, stop pit, b5
If it is fixed, information is transmitted using four pits b1 to b4. For example, when there are no unplugged outlets, "all 0"
”, if present, send as “1000”.

Next, based on the flowchart in FIG. 2, the additional device 17
The operation will be explained.

When a downlink message is received from the T-NCU 6 to the attached device (ADP month 7), the attached device 17 stores all the message data in the data memory.Then, as a result of the error check, if there is an error, it goes on standby (ready to receive). Return to mode, and if there is no error, decipher the control code in the message.

As a result of this decoding, if it is not a meter reading data request, the contents of the message in the data memory are sent to the gas meter as the terminal side device 7 (half-through). Then, the upstream message (meter reading data) from the gas meter 7 is sent to the T-NCU 6 (completely through).

When the downlink message from the T-NCU 6 is a meter reading request, and as a result of the determination by the outlet disconnection determining means 17a, the gas alarm as the terminal side device 8 is unplugged or not, after the downlink message is partially passed through to the meter 7. , the upstream message (meter reading data) from the meter 7 is completely passed through to the T-NCU 6.

As a result of the determination by the unplugged outlet determining means 17a, if the outlet is unplugged, the downstream message is sent half through to the meter 7, and then the upstream message (meter reading data) from the meter 7 is stored in the data memory for -1 time, and the outlet is disconnected. After putting the data into the telegram data, send it to 1'-N CU 6 (
half-through).

In this way, at the relay mode for exchanging messages between a terminal side device (for example, a gas meter) and a terminal side network control unit (hereinafter referred to as 'I'-N CU), the message is successively sent (stored in the data memory). ), and the "full through" mode, which sends messages in real time, is automatically used to prevent wasted communication time.

It should be noted that the present invention is not limited to the embodiments described above, and it goes without saying that many modifications and changes can be made to the bipedal embodiments within the scope of the present invention.

<Effects of the Invention> As is clear from the above description, the present invention provides control for sending data from a center-side device to a terminal-side device (for example, a gas meter) in an automatic data communication system using a terminal automatic calling operation or a no-ringing trunk. For example, if the upstream message sent from the terminal device to the center in response to a message (for example, a request for meter reading data) is loaded with information about an unplugged outlet from another terminal device (gas leak alarm), the unplugged outlet Depending on the presence or absence of the message, it is automatically determined whether the upstream message should be "half through" or "completely through" and used accordingly.

Therefore, since it is not limited to the conventional "half-through" mode, the data memory can be completely passed through, for example, when there is no disconnection from the outlet, which has the excellent effect of preventing wasted communication time.

[Brief explanation of drawings]

FIG. 1(a) is a configuration diagram of an automatic data communication system according to the present invention, FIG. 1(b) is a functional block diagram of an additional device, and FIG.
The figure is a control flowchart of the additional device of the terminal side network control device 6, and FIG.
FIG. 4 is a block diagram of the main control device of the additional device. Figures 5 and 6 are diagrams showing an example of the format of a downlink message sent from the center side to the additional device via the terminal side network control device, and Figure 7
The figure is a diagram showing an example of the format of an uplink message transmitted from the terminal side device to the center side device through the terminal side network control device, and FIG. 8 is a diagram showing an example of the structure of the l character of the message format. I: host computer, 2. center side network control device,
3: Center side exchange, 4. Terminal side exchange, 5: No-ringing trunk, 6: Terminal side network control device, 7.8: Terminal side device, 9; Home telephone, 17: Additional device, 17a:
Outlet disconnection determination means, 17b=half-through sending means,
+7c: complete through transmission means, 21, 22, 23: interface circuit, 24: main controller, 25: power supply circuit, 26: oscillation circuit, 27: reset circuit, 31: central control unit, 33 timer counter, 34 niblog RAM memory, 35: data memory, 36: interface. Noyab taste company

Claims (1)

[Claims] Data communication can be performed by making a terminal call from the terminal side device, or by connecting the terminal side network control device using a no-ringing trunk connected to the central office exchange without causing the home telephone to ring. In an automatic data communication system, the outlet is an additional device interposed between the terminal side device and the terminal side network control device, and is used to determine whether or not the information from the terminal side device includes information about an unplugged outlet. disconnection determination means, half-through transmission means for once reading the upstream message from the terminal side device based on the outlet disconnection presence signal from the outlet disconnection determination means, adding outlet disconnection information and transmitting it, and determining whether the outlet is disconnected by the outlet disconnection determination means 1. An additional device for a terminal-side network control device, characterized in that it is provided with complete through transmission means for passing an upstream message from a terminal-side device as a signal.