JPH03150948A - Terminal dialing device - Google Patents

Abstract

PURPOSE:To surely send metering information and security information to a center equipment at all times by identifying a class of a dial signal from a telephone set, storing the signal and generating a dial signal in response to the kind of the stored dial signal at a dialing to the center equipment. CONSTITUTION:A terminal dialer 8 connects to sensors 9 being meters for metering electricity, gas supply and water supply, the sensors 9 detect metering data, which are sent to a center equipment 6 via a telephone line 1 and a telephone exchange network 7. The terminal dialer 8 identifies the class of a dial signal from a telephone set 10 and stores the signal and generates a dial signal in response to the class of the stored dial signal at dialing to the center equipment 6. Thus, data representing quantity of consumption such as electricity, gas supply and water supply and security information are always surely sent to the center equipment 6.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention is connected to a telephone line and transmits various data such as consumption data of electricity, gas, water, etc. via the telephone line. The present invention relates to a terminal transmitting device that sends a call to a telephone line for transmission to a center device.

(Prior art) An automatic meter reading system that transmits usage data of electricity, gas, water, etc., read at terminals, to a central management device, or detects various status changes that occur at distributed terminals. In various security systems that transmit information and data to the central device, which is a central monitoring device, telephone lines are used to transmit various information and data from terminals to the central device, and dial signals are automatically sent from the terminals to the telephone line. The terminal calls the center device, thereby transmitting various information and data from the terminal to the center device.

Such a terminal, that is, a terminal transmitting device, is connected to a telephone line in parallel with a telephone set, and the telephone set is a dial pulse type telephone that generates a dial pulse signal as a dial signal, and a pushbutton signal (hereinafter referred to as rPB) as a dial signal. There is also a PB type telephone that generates a signal (called a "signal"). A rotary telephone is connected to a telephone line for dial pulse, and a PB telephone is used by being connected to a telephone line for PB, and a dial pulse telephone is connected to a telephone line for PB, or vice versa. Even if a telephone is connected to a dial pulse telephone line, the dial signal will be different, so it cannot be used.

Therefore, when connecting the main terminal non-calling device to a telephone line, it is necessary to check whether the telephone's dialing signal system, that is, the dialing signal system of the telephone line, is a dial pulse type or
It is necessary to determine whether it is type B and set the terminal transmitting device to output a dial signal that matches this dial signal method.If a different dial signal method is set, the terminal Unable to make a call from the transmitting device.

(Problem to be Solved by the Invention) As mentioned above, it is necessary to set the dialing signal method of the terminal transmitting device to match the dialing signal method of the telephone line to which the terminal transmitting device is connected. The dial signal system is determined according to the wishes of the subscriber who uses the telephone, that is, the subscriber changes the telephone from a dial pulse telephone to a PB telephone, or vice versa.
In response to a request to change a dial-pulse telephone to a dial-pulse telephone, the telephone office may change from a dial-pulse telephone to a PB telephone, or conversely, from a PB telephone to a dial-pulse telephone. Changes are often not communicated to the installer, such as the electric, gas, water, etc. utility, who connects the original device in parallel with the telephone to the telephone line. As a result, even though the dial signal method of the telephone line has been changed, the dial signal method of the device that has not yet made a call remains in the state before the change, so that the device that has not yet made a call cannot properly dial the telephone line. There is a problem in that the terminal cannot transmit signals and therefore cannot call the center device, and cannot transmit usage data of electricity, gas, water, etc., or security information, etc. from the terminal transmitting device to the center device. .

The present invention has been made in view of the above, and its purpose is to accurately change the dial signal method in accordance with the change in the dial signal method, and to reliably transmit information to the center device. An object of the present invention is to provide a terminal transmitting device that can make a call.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, a terminal transmitting device of the present invention is connected to a telephone line in parallel with a telephone, and transmits data to and from a center device via the telephone line. The terminal transmitting device includes: an identifying means for detecting a dial signal when the telephone makes a call and identifying the type of the dial signal; a storage means for storing the identified type of the dial signal; and dial signal generating means for generating a dial signal according to the type of dial signal stored in the storage means when making a call.

(Function) The terminal transmitting device of the present invention identifies and stores the type of dial signal from the telephone, and generates a dial signal according to the type of the stored dial signal when making a call to the center device. It has become.

(Example) Hereinafter, the present invention will be explained in detail using the drawings.

FIG. 1 is a block diagram showing the configuration of a terminal transmitting device according to an embodiment of the present invention. In the figure, the overall number is 8.
The terminal transmitting device shown in is connected to the telephone switching network 7 via the telephone line 1 from terminals LL and L2, and further connected to the center device 6 via the telephone switching network 7.
It is connected to the telephone 10 via terminals TI and T2.

This telephone 10 is connected to the telephone line 1 via the main terminal non-calling device 8.
However, circuit-wise, the telephone 10 and the terminal transmitting device 8 are connected to the telephone line 1 in parallel. Further, the main terminal non-transmission device 8 is connected to a sensor 9 which is a meter reading meter for electricity, gas, water, etc., detects meter reading data from the sensor 9, and transmits this meter reading data to the telephone line 1 and the telephone exchange network 7. The information is transmitted to the center device 6 via the center device 6.

The terminal transmitting device 8 connects to the telephone line 1 via terminals Ll and L2.
A dial pulse generation circuit 12 is connected to the telephone line 1 and outputs a dial pulse signal to the telephone line 1, and a PB signal generator is connected to the subsequent stage of the dial pulse generation circuit 12 via a capacitor 3 and outputs a PB double signal to the telephone line 1. circuit 13,
A modulation/demodulation circuit 14 that modulates and demodulates data transmission/reception signals via the telephone line 1 is disposed downstream of the FB signal generation circuit 13.
has.

Further, the terminal transmitting device 8 includes the modulation/demodulation circuit 14 and the sensor 9.
A control circuit 15 is provided between the two. This control circuit 15 controls the transmission and reception of signals between the center device 6 and the sensor 9, controls the overall operation of the main non-transmission device 8, and is composed of, for example, a microcomputer. A memory 19 is connected to this control circuit 15, and as will be described later, this memory 19 contains information on the dial signal system of the telephone line 1 to which the main end non-calling device 8 is connected, that is, the dial pulse system. It stores dial signal system information regarding whether it is a PB system or a PB system.

Further, the terminal transmitting device 8 is connected to the telephone 10 via terminals TI and T2, and includes a DP signal receiving circuit 16 that receives a dial signal from the telephone 10 and detects a dial pulse signal, and a DP signal receiving circuit 16 that detects a dial pulse signal by detecting a dial pulse signal from the telephone 10. It has an off-hook detection circuit 17 for detecting the off-hook signal, and a PB signal receiving circuit 18 for receiving the dial signal from the telephone 10 via the capacitor 5 and detecting the PB multiplied signal. And these DP
Signal receiving circuit 16, off-hook detection circuit 17 and PB
Information regarding the dial pulse signal, off-hook signal, and PB double signal detected by the signal receiving circuit 18 is read by the control circuit 15, and dial signal system information regarding the dial pulse signal or the PB double signal is stored in the memory 19. It looks like this. Note that the off-hook detection circuit 17 can be configured with a photocoupler that detects the current level between the terminals Tl and 72, or a comparator that detects the voltage level between the terminals TI and T2.

The operation of the terminal transmitting device configured as described above will be explained next.

First, when the telephone 10 connected to the telephone line 1 in parallel with the terminal transmitting device 8 takes off the receiver to make a call, the off-hook state is detected by the off-hook detection circuit 17.

After this, when the telephone 10 issues a dial signal, this dial signal is sent to the terminals TI, T2, the terminal transmitting device 8, and the terminal Ll.
, L2 to the telephone line 1, and reception is detected by the DP signal receiving circuit 16 or the PB signal receiving circuit 18 depending on the type of the dial signal.

Now, assuming that the telephone 10 is a dial pulse type telephone and the telephone line 1 is also a dial pulse line, the DP signal receiving circuit 16 receives and detects the dial pulse signal from the telephone 10.

Further, assuming that the telephone 10 is a PB double signal telephone and the telephone line 1 is also a PB double signal line, the PB signal receiving circuit 18 detects reception of the PB double signal from the telephone 10. The dial signal information detected by the DP signal receiving circuit 16 or the PB signal receiving circuit 18 is read by the control circuit 15 and stored in the memory 19. That is, when the telephone 10 is a dial pulse type telephone, dial pulse detection information is stored in the memory 19, and when the telephone 10 is a PB signal type telephone, PB signal detection information is stored in the memory 19. Ru. Note that when the telephone set 10 picks up the receiver in response to a call from the other party, or simply picks up the receiver, no dial pulse signal or PB double signal is received, and in such a case, no data is stored in the memory 19. Writing of dial pulse detection information or PB signal detection information is not performed. Therefore,
The previously stored dial pulse detection information or PB signal detection information remains stored in the memory 19 as is.

As described above, after the dial pulse detection information or PB signal detection information indicating the dial signal method of the telephone 10 is stored in the memory 19, the main terminal non-calling device 8 receives the signal from the sensor 9, and the center When attempting to transmit data to the device 6, first the off-hook detection circuit 17
Confirm that the telephone 10 is in an unused state via the . If it is in an unused state, the dial pulse generation circuit 12 or the PB signal generation circuit 13 is activated according to dial pulse detection information or PB signal detection information indicating the dial signal method stored in the memory 19, This activated circuit sends a dial signal to the telephone line 1. That is, if the information stored in the memory 19 is dial pulse detection information indicating a dial signal system, the dial pulse generating circuit 12 is activated and a dial pulse is sent to the telephone line 1. Further, when the information stored in the memory 19 is PB signal detection information, the PB
The signal generation circuit 13 is activated and a PB double signal is sent to the telephone line 1.

When a dial signal is issued using a dial pulse or a PB double signal, a transmission path is secured via the telephone exchange network 7 between the terminal transmitting device 8 and the center device 6 under the control of the telephone exchange network 7, so that the terminal transmits the call. The control circuit 15 of the device 8 performs data transmission with the center device 6 via the modulation/demodulation circuit 14.
Meter reading data etc. from the sensor 9 are transmitted to the center device 6.

In the above embodiment, the case where the DP signal receiving circuit 16 and the off-hook detection circuit 17 are separated has been described, but by integrating the two, for example, using a photocoupler etc., off-hook detection and dial pulse detection can be performed. etc. may also be done.

〔Effect of the invention〕

As explained above, according to the present invention, the type of dial signal from the telephone is identified and stored, and when a call is made to the center device, a dial signal corresponding to the type of the stored dial signal is generated. Therefore, even if the dialing signal method of the telephone line to which the main terminal is connected changes at any time, the changed dialing signal method can be accurately identified and the dialing method can always be dialed correctly. By transmitting a signal to call the center device, meter reading information, security information, etc. can be accurately transmitted to the center device at all times.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a terminal transmitting device according to an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...Telephone line, 6-fist/φ center device, 7...Telephone exchange network, 8...Terminal transmitter, 9...Sensor, 10...Telephone, 12...Dial pulse generation circuit , 13...PB signal generation circuit, 16...DP signal reception circuit, 18...PB signal reception circuit, 19φ/fist memory.

Claims (1)

[Claims] A terminal transmitting device that is connected to a telephone line in parallel with a telephone and transmits data to and from a center device via the telephone line, detects a dial signal when the telephone makes a call, and detects the dial signal when the telephone makes a call. an identification means for identifying the type of the
The invention further includes a storage means for storing the identified type of dial signal, and a dial signal generation means for generating a dial signal according to the type of dial signal stored in the storage means when making a call to the center device. Characteristic terminal transmitting device.