JP4055549B2 - Terminal network controller - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a line voltage detection method for a terminal network controller connected to a telephone line.
[0002]
[Prior art]
Conventionally, when this type of terminal network control device detects a telephone off-hook before the terminal call, the terminal call is interrupted (see, for example, Patent Document 1). At that time, the line voltage detection unit monitors the line voltage of the telephone line until the telephone is on-hooked, and detects the telephone on-hook.
[0003]
FIG. 5 shows a conventional terminal network control apparatus. In FIG. 5 , 1 is a terminal network control device, 2 is a telephone line, 3 is a telephone of a house where the terminal network control device 1 is attached, 4 is a meter terminal such as a gas meter, and 5 is a line voltage from the telephone line 2. A diode bridge that rectifies and makes the connection with the telephone line 2 non-polar, 6 is a line terminating unit that performs matching and connection control of DC resistance and AC impedance with the telephone line 2, and 7 is a signal receiving unit that receives signals. Reference numeral 8 denotes a signal transmission unit that transmits a signal. Reference numeral 9 denotes a signal transmission unit 8 that demodulates the reception signal and receives the signal from the telephone line 2 via the signal reception unit 7 or modulates the transmission signal. Reference numeral 10 denotes a modem unit that performs transmission to and from the telephone line 2 via 6, reference numeral 10 denotes a meter interface unit that performs transmission and reception with the meter terminal 4, reference numeral 11 denotes an incoming call detection unit that detects an incoming call from the telephone line 2, and reference numeral 12 denotes a telephone line 2. Time to detect voltage A voltage detection unit; 13 a switch unit for turning on / off the line voltage detection unit 12 and the signal reception unit 7; 14 a relay unit for controlling connection between the telephone line 2 and the telephone set 3; 15 a line termination unit 6; Reference numeral 16 denotes a control unit that controls the meter interface unit 10 and the switch unit 13. Reference numeral 16 denotes a battery unit that supplies power to the line voltage detection unit 12, the modem unit 9, and the control unit 15.
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 8-22312
[Problems to be solved by the invention]
However, in the conventional configuration, when the telephone off-hook is detected before the terminal is called, the line voltage of the telephone line is monitored by the line voltage detection unit until the telephone is on-hook, and the telephone on-hook detection is not performed. If the switch is turned on / off, the phone will make a popping sound due to a slight voltage change due to the impedance of the signal receiver and modem, so the line voltage detector is always operated until on-hook is detected. Therefore, there is a problem that the power consumption of the battery is large.
[0006]
An object of the present invention is to solve the above-described conventional problems, and to provide a terminal network control device that reduces battery power consumption until on-hook detection when a telephone off-hook is detected before a terminal is called. To do.
[0007]
[Means for Solving the Problems]
In order to solve the above-described conventional problems, a terminal network control device according to the present invention includes a first switch for turning on / off a line voltage detector, a second switch for turning on / off a signal receiver, The control part which performs intermittent control of this switch is provided. As a result, the line voltage detection unit and the signal reception unit can be controlled separately on and off, and the line voltage detection unit can be operated intermittently without hearing a popping sound from the telephone.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The invention according to claim 1 is a line termination unit that performs matching and connection control of DC resistance and AC impedance with a telephone line, a signal receiving unit that receives a signal, a signal transmitting unit that transmits a signal, A modem that demodulates a received signal received from the telephone line via the signal receiver, or modulates a signal transmitted to the telephone line via the signal transmitter and the line terminator, and a meter A meter interface unit that performs transmission and reception with a terminal, an incoming call detection unit that detects an incoming call from the telephone line, a line voltage detection unit that detects a voltage of the telephone line, and a first switch that turns on and off the line voltage detection unit 1 switch, a second switch for turning on and off the signal receiving unit, the line terminating unit, the modem unit, the meter interface unit, the first switch, and the second switch. Controls the switch, the telephone by comparing the first switch performs intermittent control of the first switch to the ON state at predetermined time intervals, a predetermined reference voltage and the line voltage detecting unit of the output signal By providing a control unit that performs off-hook detection and on-hook detection of the battery, and a battery unit that supplies power to the line voltage detection unit, the modem unit, and the control unit, the line voltage detection unit and the signal reception unit are turned on separately.・ Battery until on-hook detection is detected when off-hook of the telephone is detected before the terminal is called, because the line voltage detection unit can be operated intermittently without being heard from the telephone, and it can be controlled off. It is possible to provide a terminal network control device with reduced power consumption.
[0009]
The invention according to claim 2 is particularly low in telephone usage by providing the control unit according to claim 1 with a mode for making a terminal call at night using a clock function in the control unit. At night, the probability of detecting off-hook of a telephone before calling a terminal is lowered, and a terminal network control device can be provided that reduces battery power consumption at night.
[0010]
According to a third aspect of the present invention, in particular, the control unit according to the first aspect of the present invention is a mode in which the first switch is turned on only at night using the clock function inside the control unit. By providing the terminal network control device, the terminal can be called immediately after the telephone is on-hooked at night.
[0011]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0012]
Example 1
FIG. 1 shows a block diagram of a terminal network control apparatus in Embodiment 1 of the present invention. In FIG. 1, 1 is a terminal network control device of the present invention, 2 is a telephone line, 3 is a home telephone to which the terminal network control device 1 is attached, 4 is a meter terminal such as a gas meter, and 5 is a telephone line 2 A diode bridge that rectifies the line voltage and makes the connection with the telephone line 2 non-polar, 6 is a line terminator for matching and controlling connection of DC resistance and AC impedance with the telephone line 2, and 7 is a signal for receiving signals A receiving unit 8 is a signal transmitting unit that transmits a signal, 9 is a signal receiving unit 7 that demodulates the received signal and receives it from the telephone line 2, or modulates a transmission signal and receives the signal transmitting unit 8, A modem unit that performs transmission with the telephone line 2 via the line termination unit 6, 10 a meter interface unit that performs transmission and reception with the meter terminal 4, 11 an incoming call detection unit that detects an incoming call from the telephone line 2, and 12 a telephone Check line 2 voltage A line voltage detector 17 for switching on / off the line voltage detector 12, a switch 2 for turning on / off the signal receiver 7, and 14 for controlling connection between the telephone line 2 and the telephone 3. The relay unit 15 controls the line termination unit 6, the modem unit 9, the meter interface unit 10, the switch 1 unit 17, the switch 2 unit 18, and detects the off-hook and on-hook detection of the telephone 3 by the output of the line voltage detection unit 12. , A control unit 16 that performs intermittent control of the switch 1 unit 17, and a battery unit 16 that supplies power to the line voltage detection unit 12, the modem unit 9, and the control unit 15.
[0013]
About the terminal network control apparatus comprised as mentioned above, the operation | movement and an effect | action are demonstrated below. First, an incoming call operation from the center device of the meter reading center that performs automatic meter reading via the telephone line 2 will be described. When detecting the incoming signal from the center device, the incoming detection unit 11 notifies the control unit 15 of the incoming signal. The control unit 15 turns on the switch 2 unit 18, and the received signal from the telephone line 2 is detected by the modem unit 9 via the signal receiving unit 7.
[0014]
When the modem unit 9 detects the received signal, it notifies the control unit 15 of the received signal. If the received signal is destined for the own device, the control unit 15 matches the line terminating unit 6 with the line impedance in the communication state, and sends the transmission signal to the telephone line 2 via the modem unit 9 and the signal transmitting unit 8. With the above operation, connection with the center apparatus is performed, and data communication is performed between the meter terminal 4 and the center apparatus via the meter interface unit 10.
[0015]
On the other hand, when a terminal call signal is notified from the meter terminal 4 to the control unit 15 via the meter interface unit 10, the terminal network control device performs a terminal call operation. The control unit 15 matches the line termination unit 6 to the line impedance of the terminal calling state, and controls the modem unit 9 and the line termination unit 6 to dial the call destination, thereby connecting to the center device. Do. After the connection with the center apparatus, communication such as communication between the control unit 15 and the center apparatus and notification of meter reading data from the meter terminal 4 to the center apparatus is performed.
[0016]
Further, the line voltage detection unit 12 detects the line voltage of the telephone line 2, and the control unit 15 compares the reference voltage set in advance with the line voltage detected by the line voltage detection unit 12 before calling the terminal. The controller 15 interrupts the terminal call when detecting the off-hook of the telephone set 3 from the contents, and turns on the switch 1 at regular intervals until the telephone set 3 is on-hooked. At 12, the line voltage of the telephone line 2 is monitored. The principal part flowchart by this control part 15 is shown in FIG. In FIG. 2, the terminal call operation starts from step 19, the switch 1 unit 17 is turned on at step 20, and the reference voltage preset at step 22 and the line voltage detection unit 12 input at step 21 are detected. The line voltages are compared, and off-hook detection of the telephone 3 is performed from the contents. If an off-hook of the telephone 3 is detected, the terminal call operation is interrupted at step 23, the switch 1 unit 17 is turned off at step 24, and after a predetermined time (x seconds) has elapsed at step 25, the operation from step 20 is performed. repeat. If the off-hook of the telephone 3 is not detected in step 22, terminal call processing is started in step 26.
[0017]
As described above, in this embodiment, the switch 1 unit 17 for turning on / off the line voltage detection unit 12, the switch 2 unit 18 for turning on / off the signal receiving unit 7, and the intermittent control of the switch 1 unit 17 are performed. By providing the control unit 15 to perform, the line voltage detection unit 12 and the signal reception unit 7 can be controlled on / off separately, and the line voltage detection unit 12 can be intermittently operated without hearing a popping sound from the telephone 3. It is possible to provide a terminal network control apparatus that can be operated and that reduces the power consumption of the battery until the on-hook detection when the telephone 3 is detected off-hook before the terminal is called.
[0018]
(Example 2)
FIG. 3 is a main part flowchart by the control unit 15 of the terminal network control apparatus according to the second embodiment of the present invention. In FIG. 3, in step 27, the clock function in the control unit 15 is used to determine whether it is night or not, and if it is night, a terminal is called.
[0019]
As described above, in this embodiment, a mode for making a terminal call at night using the clock function in the control unit 15 is provided, so that the telephone can be off-hook before the terminal is called at night when the telephone usage is low. It is possible to provide a terminal network control apparatus that reduces the probability of detection and reduces the power consumption of the battery at night.
[0020]
(Example 3 )
FIG. 4 is a main part flowchart by the control unit 15 of the terminal network control apparatus according to the third embodiment of the present invention. In FIG. 4 , it is determined whether or not it is nighttime using the clock function in the control unit 15 in step 33, and the switch 1 unit 17 is always controlled if it is nighttime.
[0021]
As described above, in this embodiment, a mode in which the switch 1 unit 17 is always controlled only at night using the clock function in the control unit 15 is provided, so that the terminal call is made immediately after the telephone is on-hook at night. It is possible to provide a terminal network control device that can be used.
[0022]
【The invention's effect】
As described above, according to the terminal network control apparatus of the present invention, it is possible to reduce the power consumption of the battery until the on-hook detection when the telephone off-hook is detected before the terminal is called.
[Brief description of the drawings]
Flow [4] of the terminal network control apparatus according to the second embodiment of FIG. 1 is a flowchart of the block diagram Figure 2 the terminal network control device of the terminal network control apparatus according to the first embodiment of the present invention [3] The present invention FIG. 5 is a flowchart of a terminal network control apparatus according to a third embodiment of the present invention. FIG. 5 is a block diagram of a conventional terminal network control apparatus.
DESCRIPTION OF SYMBOLS 1 Terminal network control apparatus 2 Telephone line 3 Telephone 4 Meter terminal 6 Line termination part 7 Signal receiving part 8 Signal transmission part 9 Modem part 10 Meter interface part 11 Incoming detection part 12 Line voltage detection part 15 Control part 16 Battery part 17 Switch 1 Part 18 Switch 2 part

Claims (3)

A line terminating unit for controlling matching and electrical connection of DC resistance and AC impedance with a telephone line, a signal receiving unit for receiving a signal, a signal transmitting unit for transmitting a signal, and the telephone via the signal receiving unit A modem unit that demodulates a received signal received from a line, modulates a transmission signal to be transmitted to the telephone line via the signal transmission unit, the line termination unit, a meter interface unit that transmits and receives to a meter terminal, An incoming call detecting unit for detecting an incoming call from the telephone line, a line voltage detecting unit for detecting a voltage of the telephone line, a first switch for turning on / off the line voltage detecting unit, and an on signal receiving unit. - a second switch off, the line termination unit, a modem unit, the meter interface unit controls the first switch and the second switch, said first switch The performs intermittent control of the first switch to the ON state at predetermined time intervals, the control unit executing the off-hook detection and hook detection of the telephone by comparing the preset reference voltage and the line voltage detecting unit of the output signal And a terminal network control device comprising a battery unit that supplies power to the line voltage detection unit, the modem unit, and the control unit.   The terminal network control device according to claim 1, wherein the control unit calls the terminal at night using a built-in clock function. 2. The terminal network control device according to claim 1, wherein the control unit performs constant control to turn on the first switch only at night using a built-in clock function.

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