JPH01157154A - Network control equipment - Google Patents

Abstract

PURPOSE:To perform data collection by means of terminal outgoing by detecting a terminal call issuing request signal from a terminal equipment, receiving the following telephone number data of a call issuing opponent side, and performing a call issuing processing based on the data. CONSTITUTION:The terminal call issuing request signal is sent from the terminal equipment B. A network control unit A for terminal equipment detecting the terminal call issuing request signal, after switching a signal switching part 5 from a serial data input/output part 6 to 2-wire/4-wire conversion part 7, receives the telephone number data of a center device sent from the equipment B. And it performs a call issuing operation for a received telephone number. Meanwhile, the equipment B transmitting the telephone number data turns OFF the terminal call issuing request signal, and is set at a reception waiting state for a terminal equipment start-up signal by the completion of the incoming of the unit A. Then, the equipment B receiving the terminal equipment start-up signal transmits security information to the center device.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention utilizes subscriber telephone lines to make terminal calls and
The present invention relates to a terminal network control device for a system that collects data through no-ringing calls.

(Prior art) Fig. 3 shows that data is transmitted using a subscriber telephone line by making a terminal call and by no-ringing (a method of calling a terminal device connected to the same telephone line without ringing the telephone bell). A system configuration diagram of a system that performs collection is shown. Reference numeral (31) is a center device of the terminal device (39) that collects data sent by automatic dialing (automatic dialing) of the terminal device (39). (32) is a network control device with an automatic call receiving function, which detects a ringing signal (telephone/bell ringing signal) from the exchange (35),
31) A device that connects a side line and a telephone line. (33
) is a no-ringing storage system/center device, which connects a terminal device (39) to a line by a no-ringing call and collects data. (34) is a network control unit for the center equipment (hereinafter referred to as C-NCU), which, in response to instructions from the center equipment (33), captures the exchange line for no-ringing, and the network control unit for terminals (37) (hereinafter referred to as
This is a device that performs processing such as line acquisition (referred to as R-NCU). (36) is a no-ringing trunk (a special exchange that makes no-rigging calls), and C-NCU
A device that captures the telephone line of the telephone number of the terminal device (3'9) sent from (34) and calls ANR-NCU (37) with a ringing signal different from the normal telephone bell ringing signal. be. (37) is a network control device installed on the terminal device side, which detects the above-mentioned no-ringing call signal and seizes the telephone line.
9) (no-ringing incoming call function) and a function to automatically make a call to the other party and call the other party (terminal originating function) according to a command from the terminal device (39).

The terminal device 39 is, for example, a gas meter with an automatic meter reading function or a shutoff function, and (40) is a sensor such as a gas flow rate pulse transmitter.

(38) is a telephone set, which is connected to the same telephone line as ANR-NCU (37).

As a specific usage example of this system, in the example of the gas meter mentioned above, ``In data collection by no linking call, gas meter automatic detection decoy 1'' is changed to ``In data collection by end call method, security such as waste leak alarm etc. used to collect information.

As mentioned above, J
Because the types of data handled are different in data collection, the center devices (31) and (33) are installed in different locations, and each data collection method (transmission procedure) uses a monologue procedure. There are many.

Conventionally, in order to enable data collection through no-linking incoming calls and terminal outgoing calls, the four-wire signal transmission system proposed by the Ministry of Posts and Telecommunications, Comprehensive Telemeter System Development Council (see Appendix 11: Report of March 1980) was used. The method is known. An example of a related patent using this method is Japanese Patent Application Laid-Open No. 58-9795.
4, Japanese Patent Application Laid-Open No. 58-97955.

(Problems to be Solved by the Invention) The present invention provides two signal lines between a terminal network control device and a terminal device.
Even with the 2-wire system, it is possible to collect data from no-ringing calls and terminal calls as before.
It is an object of the present invention to provide a data transmission procedure and a network control device for terminals that prevent problems that occur during wire data transmission.

[Structure of the Invention] (Means for Solving the Problems and Their Effects) The present invention connects a network control device and a terminal device with two wires, and connects the terminal device to the network control device by ringing incoming calls. Means for transmitting an activation signal and transmitting and receiving data after activation using two wires, detecting a terminal call request signal from the terminal device, receiving subsequent telephone number data of the called party, and based on it. This system is configured with a means for carrying out outgoing IIf processing and transmitting and receiving data using two wires after a line is established, thereby achieving the initial objective 1].

(Example) Fig. 1 shows a terminal network control unit (ANR-NCU) of the present invention.
(A>'s hard block diagram is shown in Figure 2.
A wire interface circuit is shown.

(1) is an automatic calling network control unit, which is not shown in Fig. 5(b) and performs calling operations (■ telephone line loop closing, ■ calling signal detection,
■Dial call @ transmission, ■Paging signal detection, ■Polarity reversal detection, ■Incoming call response signal detection, etc.> and recovery operations (■Data communication end signal detection, ■Telephone line loop opening, etc.)
Pa executed (or detected) by the command of PtJ (3)
have the ability.

(2) is the no-linking terminating network control unit (NR-N CU).
>, the incoming call processing (■
Replacement operation (polarity reversal detection, etc.) ■NCU call signal detection,
■ Sending NCU response signal, etc.) and recovery operations (■ detecting data communication end signal, ■ opening loop of telephone line, etc.) are executed by the command of CPLJ (3) in the same way as when making a terminal call.

(4) is a modem section, which demodulates the received data from the center device, and also connects the CPU (3) or the terminal device (B).
It has a function to modulate serial data (transmission data) from

(5) is a signal switching unit, which changes the signal flow of the communication data and reception data according to the command signal of the CPU (3).modem (4)←>serial data (SIO) (6),
Modem (4) - 2-wire to 4-wire converter (2-41/F) (7
), ■S IO (6) -2-4 I/F (7).

Is 5IO(6) a sirif? It has a function to convert from parallel data to parallel data.

2-4I, -・' (7) performs data transmission of the two signals of transmission (SD) and reception (RD) from Mochimu (4) or 8゜10 (6) over the two wires of DT and SG. It is an interface circuit.

An embodiment of this circuit is shown in FIG. This circuit consists of a terminal activation signal switch (SWI) (which indicates terminal activation by applying voltage VDD), a current limiting resistor (R1), a pull-down resistor (R2), and a call detection that detects the application of voltage VDD due to a terminal call request. buffer (8-1>), reception data buffer F (8-2>, transmission data transistor (Tr
l> (Tr1 on state: Q, off state: 1)
It consists of An interface circuit with a similar circuit configuration is also provided on the terminal device (B) side, and as shown in the figure, DT, SG
Connected by two wires.

FIG. 4 shows a data collection method using no-ringing incoming calls. Figure 4 (a) shows the transmission and reception timing chart of signals (data) between ANR-NCU (A) and terminal equipment (B), and Figure 4 (b) shows the data collection procedure (transmission) of the entire system. The operation of one embodiment will be explained below using the example of the gas meter described in the prior art section and with reference to FIG. 1 and its explanation.

As a data collection procedure, the ANR-NCU (A) of the corresponding customer is called by a no-ringing call.

ANR-NC (J (A) is a no-ringing incoming call (“
When an 'NCU call signal') is detected, an 'NCU response signal is sent to the center device (no-ringing trunk: NRT), and the data communication state (receiving state of "terminal activation request data" from the center device) is entered. .After that, if "terminal activation request data" is received, ANR-NC
U (A> is the modem (4)←>2-
4 After switching to I/F (7), a "terminal device activation signal" is sent to the terminal device (B). This is made into a terminal device activation signal by turning <sw”+> “on” in Fig. 2 and generating voltage 9 to the DT line.The terminal device that received the “terminal device activation signal” ( B) sends the "meter reading data" back to the sensor device using transistor No. 2 (Tr).

In the case of normal meter reading data collection, the data communication ends after sending "normal completion response data" from the center device to the terminal device (B). If you wish to make any changes to the ``Normal End Response Data'' transmission page, please send this data communication to the actual 7If!
! Tsuru.

By the above procedure, data can be collected by no-ringing calls.

Figure 5 shows a data collection method using terminal transmission.

Fig. 5 (a> shows the transmission timing of signals (data) between the ANRNCU (A) ←)'ja end device (B).
Figure 5(b) shows the data collection procedure for the entire system. As a terminal calling procedure, a "terminal call request signal" is sent from the terminal device (B). Similar to when a no-ringing call is received, this generates a voltage (vD, ) on the DT line to generate a "terminal call request signal."

ANR-NCU (A
＞ means the signal switching section (5) is 5IO(6)←=2-4 I/
After switching to F (7), the terminal device (8) receives the telephone number data of the center device sent from the terminal device (8).Then, it performs a calling operation to the received telephone number.

On the other hand, the terminal device ([3) that sent the "telephone number data" turns off the "terminal call request signal" and sends the ANR-NCU (
A> When the incoming call is completed, the device enters a waiting state for receiving the "terminal device activation signal".

The terminal device (B) that has received the "terminal device activation signal" transmits "security information", for example, "gas leak alarm data" to the center device. Thereafter, "normal end response data" is returned from the center device to the terminal device (B), and the data communication is completed.

By the above procedure, data collection by terminal transmission can be performed.

By the way, in this embodiment, A N R-N CU (
A) sends a “terminal device start signal (SWl) to the terminal device (B).
: ON)", the data sent from the terminal device (B) will be different between the two methods.

Namely, ■No-ringing method: Meter reading data (see Figures 4 (a) and (b)). ■No-ringing method: Security information data (see Figures 5 (a) and (b)).

As a result, for example, if a "no-ringing call signal" and a "terminal call request signal" are simultaneously sent out at the timing shown in FIG. There is a risk that the information will be sent to the wrong center device and lost.

As a method for solving this problem, the procedure shown in FIG. 7 can be considered. In other words, when a "terminal device start signal" is sent from the ANR-NCU (A> to the terminal device (B)), meter reading data must be returned, and the transmission procedure for the "terminal device start signal" is divided into two methods. This is a method of controlling.

In the example shown in FIG. 7, after the originating device is activated, the "security day information" is sent back from the terminal device (B) in response to a security data request command from the center device using the untransmitted method to ψ.

By implementing the above transmission procedure, 1. Loss of information due to erroneous transmission of security information as shown in FIG. 6 can be avoided.

[Effects of the Invention] As described above, according to the present invention, even when the signal line between the ANR=NCU and the terminal device is a two-wire system, data from no-ringing incoming calls and terminal originating, which is the original purpose, can be achieved as in the conventional case. A collection system can be provided.

[Brief explanation of the drawing]

FIG. 1 is a hard block diagram of a terminal network control device ANR-NCU of the present invention, and FIG. 2 is a hardware block diagram of a terminal network control device ANR-NCU of the present invention.
An interface circuit diagram between the NR-NCU and the terminal device, FIG. 3 is a system configuration diagram of a conventional example, and FIG. 4 (a> and FIG. 4 (b) are timing diagrams showing the data transmission procedure according to the no-ringing method of the present invention. Charts and flowcharts. Figures 5(a) and 5(b) are timing charts and flowcharts showing data transmission procedures using the terminal calling method, and Figure 6 shows the terminal calling method in two-wire transmission. FIG. 7 is a flowchart illustrating the problem and is a flowchart of another embodiment of the present invention.

Claims (2)

[Claims] (1) In a network control device installed on the terminal device side of a data collection system that uses a subscriber telephone line to collect data using a ringing call method and an end-of-call method, a link between the network control device and the terminal device means for connecting the network controller with two wires, and transmitting a terminal device activation signal to the network control device by receiving a ringing call, and transmitting and receiving data after activation using the two wires; and a terminal call request signal from the terminal device. A network control device characterized by having means for detecting the telephone number of the calling party, receiving subsequent telephone number data of the calling party, performing call processing based on the data, and transmitting and receiving data using two wires after the line is established. . (2) Even in no-ringing incoming calls and terminal calls,
Claim 1, characterized by having means configured such that the data transmission sequence after the line between the terminal device and the center device is established is common regardless of the method used. The network control device described in Section 1.