JP2001136304A - Wireless communication adaptor and its remote supervisory system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a remote supervisory system that always supervises quality of communication by a wireless communication adaptor by which a maintenance center can quickly grasp the occurrence of trouble and its cause. SOLUTION: The wireless communication adaptor ADA connects key telephone sets 5 to a general wired communication line REG and connects the key telephone sets 5 to a mobile phone 3 to attain a speech between an external telephone set and the key telephone set 5 through the intervention of the mobile phone 3. The wireless communication adaptor is provided with a supervisory means that always supervises an operating state of the mobile phone 3 and with a transmission means by which an operator can recognize an event detected by the supervisory means at other place.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication adapter and a remote monitoring system capable of constantly grasping the operating state of an attached wireless telephone.

[0002]

2. Description of the Related Art In transmitting / receiving data from / to a mobile phone, a direct connection from a key phone in a company to the mobile phone is more difficult.
In the meantime, if a mobile phone is interposed, a call charge becomes cheaper, and wireless communication adapters for transmitting and receiving a call via a mobile phone are widely used. The applicant is a company that has developed this wireless communication adapter, has obtained a patent, and is widely recognized among users as a pioneer company of the wireless communication adapter.

[0003]

However, this wireless communication adapter is extremely effective in reducing the communication fee. However, in order to further improve the completeness of the apparatus and the convenience for the user, the following is required. There was such a problem.

[0004] That is, the wireless communication adapter transmits and receives a call through a portable telephone attached to the adapter, but the call state may suddenly deteriorate from a certain time. The cause of such a situation is, firstly, a change in the radio wave environment around the adapter. For example, when a large building is constructed adjacently, the call state may be suddenly deteriorated. . In such a case, it is necessary to quickly grasp the cause of the trouble and install a reinforcing antenna on the roof of a building or the like to cope with the problem.

Further, even if there is no dramatic environmental change as described above, for example, the power supply voltage cannot be maintained at a predetermined value irrespective of the operation of the charging circuit due to the exhaustion of the battery of the portable telephone.
As a result, the call state was sometimes deteriorated. Even in the case of such a trouble, the cause is not known on the user side. Therefore, a system that can quickly grasp the cause of the trouble and quickly cope with the trouble is desired.

[0006] Furthermore, regarding the cost incurred by the communication via the wireless communication adapter, for example, if it is possible to know the accumulated call charge per month, the user can grasp how much the cost can be saved by the wireless communication adapter. It can be extremely effective.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and constantly monitors the quality of communication by a wireless communication adapter, and when a trouble occurs, a maintenance center including the cause can be quickly grasped. It is an object to provide a remote monitoring system.

[0008]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention connects a general telephone to a wired communication line, connects the general telephone to a radio telephone, and interposes the radio telephone. A wireless communication adapter that also enables a telephone call between the external telephone and the general telephone, monitoring means for constantly monitoring the operation state of the wireless telephone,
Transmission means for recognizing a situation detected by the monitoring means at another place.

Further, the present invention connects a general telephone to a wired communication line, and connects the general telephone to a radio telephone so that a telephone call between the external telephone and the general telephone can be made via the radio telephone. The wireless communication adapter and the maintenance center are connected through a communication line. The wireless communication adapter includes a monitoring unit that constantly monitors the operation state of the wireless telephone, and a monitoring unit that detects a situation detected by the monitoring unit. Transmission means for recognition at the maintenance center is provided.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail based on embodiments. FIG. 1 is a block diagram showing a remote monitoring system according to an embodiment of the present invention. As shown in the figure, the remote monitoring system is configured by connecting a maintenance center CEN and a wireless communication adapter ADA through a general public network REG and a mobile communication network MOB. A general-purpose personal computer 1 is arranged at the maintenance center CEN, and is connected to a general public line REG through a modem 2.

A general-purpose mobile telephone 3 is attached to the wireless communication adapter ADA, and a key telephone 5 ( _5-1 , _5-2 ) is connected via a PBX main unit 4 or the like. Ordinary transmission / reception is performed by the key telephone 5⇔mobile telephone 3⇔mobile communication network MOB⇔destination mobile telephone or the key telephone 5⇔general public line network REG⇔the other company's key telephone. That is, the telephone number unique to the mobile phone starting with “090” or the like is assigned to the key telephone 5.
In this case, the wireless communication adapter ADA automatically selects the mobile phone 3 and makes a call to, for example, a mobile phone of a visiting employee. Similarly, when a call is received from a mobile phone of an employee on the go, the mobile phone 3
Is connected to the key telephone 5.

On the other hand, when a normal telephone number starting with "06" or the like is input on the key telephone 5, the wireless communication adapter ADA selects the general public line network REG, and follows the normal procedure to the other party. Make a call to your company key phone. Similarly, when a call is received via the general public network REG, the call is directly connected to the key telephone 5 without passing through the mobile telephone 3.

However, when the wireless communication adapter ADA is set to the transfer mode, when a call is received via the general public line network REG, the call is transmitted to the destination mobile phone via the mobile phone 3. I do. This wireless communication adapter
The ADA also operates in such a transfer mode, so that an incoming call to a company can be received by a mobile phone on the go, which is extremely effective for a private company or the like.

A major feature of the present system is that the wireless communication adapter ADA realizes the above operation and constantly monitors the operation state of the mobile phone 3. The monitoring items are not particularly limited, and include, for example, presence / absence of a failure of the mobile phone, reception level information of the mobile phone, out-of-service display information indicating whether the communication destination is out of the service area, low-voltage warning information of the battery of the mobile phone, unregistered Information on whether or not a mobile phone is connected, accumulated call time, accumulated call charge, and the like.

Of these monitoring items, the presence / absence of a failure of the mobile phone, the reception level information, the battery voltage drop warning information, and the information on whether or not the communication destination is out of the service area are usually output from the mobile phone 3 as downlink information. Therefore, the wireless communication adapter ADA can perform the above monitoring by reading the downlink information. Also, regarding the accumulated call time and accumulated call charge, since at least one call time and call charge can be obtained from the mobile phone 3 as downlink information, the information may be accumulated in the wireless communication adapter ADA. become.

On the other hand, an unregistered mobile phone is generated when the user replaces the mobile phone 3 without permission, but the wireless communication adapter ADA is used because the telephone number is different.
Side can recognize. Note that the wireless communication adapter ADA shown in the embodiment includes a charging circuit and performs a charging operation when the mobile phone 3 is not in a call. You can know the battery life.

The information obtained by the constant monitoring in this manner is sequentially subjected to necessary arithmetic processing in the wireless communication adapter ADA, and then stored as accumulated data. As the stored data, although not particularly limited, the total of the mobile phone call time, the total of the mobile phone call charges, the total of the mobile phone saving charges, the number of times of receiving the warning of the low battery voltage, the number of times of receiving the information indicating the out-of-service display reception, The number of times that the reception sensitivity level is equal to or less than the set value, the average value of the reception level, and the like.

According to the alarm condition set at the time of the initial setting, when the alarm condition is satisfied, the wireless communication adapter ADA calls the maintenance center CEN through the general public line REG to notify the contents of the abnormality. I have. Also,
For a user whose management is always determined by a maintenance contract or the like, the wireless communication adapter ADA is called from the maintenance center CEN at regular intervals, and necessary information is collected. Then, when an abnormality is found, an appropriate response according to the content of the abnormality is promptly performed.

FIG. 2 is a schematic block diagram of the wireless communication adapter ADA according to the present embodiment, and FIG. 3 is a detailed block diagram showing FIG. 2 in some detail. As shown in FIG. 3, this adapter ADA is key telephone _5-1 via the PBX main unit 4, extension connection terminal JK1 connected to 5 _-2, JK2
And external line connection terminals JK3 and JK connected to the general public line REG
4, a mobile terminal CN1 connected to the mobile phone 3, and a data output terminal CN2 for outputting data required for the display board DISP.
And a serial data terminal CN5 used for downloading a program from a personal computer.

The display board DISP is composed of, for example, seven-segment LEDs (ten) for displaying ten-digit numbers and a plurality of light-emitting diodes (N). Depending on which of the N light emitting diodes is lit,
The operation mode of the wireless communication adapter ADA can be understood. Specifically, the call transfer mode, the normal operation mode, the test mode, the construction setting mode, the maintenance communication mode, and the like. You can see if it is inside.

Further, depending on the lighting locations of the N light emitting diodes, the meaning of the number indicated by the 7-segment LED is indicated. For example, the display contents of the 7-segment LED can be grasped such as the total of the mobile phone saving charges, the telephone number, the set parameter, the reception sensitivity of the mobile phone, the error type, and the like.

The wireless communication adapter ADA of the present embodiment
As shown in FIG. 2, a central control unit 20, an extension analog telephone communication control unit 21, the network control unit 22 _-1, 22 _-2, pseudowire 23 _-1, and 23 _-2, FSK signal transmission and reception Unit 24, a signal level shift unit 26, a digital audio processing unit 27,
A charging unit 28 for charging the mobile phone 3 and a power supply circuit unit 29
It is composed of

As shown in FIG. 3, the central control unit 20
Chip microcomputer U17 and rewritable memory EEP
It consists of a ROM (U16) and a power reset unit U18 for resetting the microcomputer U17.
Controls the operation of each unit of the device according to the program stored in the memory U16.

The extension analog channel control unit 21 is shown in the upper center of FIG. 3 and includes tone decoders U5 and U6.
And analog switches U8, U9, etc., for recognizing a DTMF (Dual Tone Multi Frequency) signal transmitted from the key telephone 5 or for outputting a signal from the one-chip microcomputer U17.
The pulse wave of 00 Hz is supplied to the key telephone 5 after being shaped by the low-pass filter unit U24A.

FIG. 4 is an example of a pseudowire circuit 23 _-1 illustrated in the upper left portion of FIG. 3, but illustrating more detail. Although the same configuration circuit 23 _-2 exists one more, for convenience of description, only the parts 23 _-1 connected to the extension connection terminal JK1. As shown in FIGS. 3 and 4, the pseudo line control unit _23-1 includes a photocoupler PH1 and three relays R.
It mainly includes Y1, RY2, and RY3, drivers U7B, U7C, and U7D that control the operations of the relays RY3 to RY1, and a hybrid circuit HY. The hybrid circuit HY is a circuit that transmits a transmission sound and a reception sound, and in this embodiment, is configured by three amplifiers U1, U2A, and U2B.

As shown in FIG. 4, the relay RY3 is adapted to switch the contacts in accordance with the output level of the driver U7B, output from EKT 5 _-1 (JK1),
Tell the general wired line JK3 side (LA1, LA2) or relay RY
Switch to tell 2 side. The relay RY2 is a relay for switching the polarity (±) of the DC voltage. When a call is transmitted from the key telephone _5-1 through the mobile telephone 3, when the other mobile telephone goes into an OFF hook state, the key telephone responds accordingly. 5 _-1 (actually PBX main unit 4)
The polarity of the DC voltage supplied to the power supply is switched. The off-hook state of the mobile phone at the destination can be known by a billing signal or the like sent to the mobile phone 3, and by switching the polarity of the voltage supplied to the PBX main unit 4, The device 4 can start the accounting calculation.

The relay RY1 is a relay for switching whether to supply the phone ring tone 75VAC a (ringing tone) to the key telephone set _5-1, connects the audio circuitry of the mobile telephone 3 and the key telephone _25-1. The contacts of these three relays RY3, RY2, RY1 are switched up and down by drivers U7B, U7C, U7D which operate under the control of the one-chip microcomputer U17.

A resistor R5 → transistor Q1 → photocoupler PH1 → diode D is provided between the relays RY2 and RY1.
Are provided. And the photocoupler PH
The output of one phototransistor is supplied to a one-chip microcomputer U17. Thus, recognition in a state where the relay contact RY3 are underneath, the key telephone set _25-1 is OFF hook state, the 1-chip microcomputer U17 is a transition to the OFF hook state by lighting of the light emitting diode of the photo coupler PH1 can do. In addition, key telephone 5
_{When the -1} sends a dial pulse, the one-chip microcomputer U17
Can recognize the dial pulse.

FIG. 5 shows an example of the network control unit _22-1 shown in the center left part of FIG. 3 in more detail.
As shown in FIG. 5, network control unit 22 _-1 includes a loop detection unit PH3, PH4 for detecting a speech current, the ring detection unit PH9 for detecting a ringing tone from the public telephone REG, dial pulse (DP) Dialer U26 that generates a push button (PB) signal and push button (PB) from dialer U26
A signal amplification unit U28 and a transmission unit 30 for transmitting a dial sound to the general public line REG via the transformer TF1 or the photocoupler PH5 depending on whether the sound is a tone (PB) sound or a pulse (DP) sound.
And audio amplifiers U30A and U30B. In addition,
It adopts a same configuration as the network control unit 22 _-1 also network control network _22-2.

On the left side of FIG. 5, a circuit configuration near the connection terminal JK3 to the general wired line REG is shown.
The circuit configuration near the connection terminal JK4 is also the same). The terminals LA1 and LA2 shown in FIG. 5 are the same as the terminals LA1 and LA2 shown in FIG. 4 and have a function of connecting the key telephone _5-1 and the general wired line REG. Terminal LA1 is connected to general wired line R
Although directly connected to the EG, the terminal LA2 is connected to the general wired line REG through the photocouplers PH3 and PH4. The photocouplers PH3 and PH4 constitute a loop detector together with the one-chip microcomputer U17, and the phototransistor outputs of the photocouplers PH3 and PH4 are connected to the one-chip microcomputer U17.

[0031] Thus, the relay RY3 is changed to (phototransistor OFF photocoupler PH5), key telephone set 5 _-1 lifted OFF hook state Figure 4 in a state of being connected to the upper contact, generally wire line The light emitting diodes of the photocouplers PH3 and PH4 are turned on based on the DC voltage from the REG, and the phototransistors are turned on. Therefore, the 1-chip microcomputer U17 can know the transition to OFF hook state of the key telephone _5-1.

A ring detector 31 is connected to the general public line REG (center part in FIG. 5). The ring detector 31 includes a full-wave rectifier circuit SEC1 and a photocoupler PH9.
The DC output terminals (+,-) of the full-wave rectifier circuit SEC1 are connected to a photocoupler PH9 (light emitting diode).
And the Zener diode ZD1 are connected in series. The light-emitting diode of the photocoupler PH9 has a varistor S
V7 is connected in parallel. On the other hand, an AC input terminal (-) of the full-wave rectifier circuit SEC1 is connected to a general public line REG through a series circuit of a resistor R79 and a capacitor C66. Since the ring detector 31 is configured as described above,
When a ringing tone is sent from the general public line REG, the light emitting diode of the photocoupler PH9 blinks, which causes the one-chip microcomputer U17 to call the key telephone 5. Will be recognized.

The photocoupler PH5 and the transformer TF1 constitute a transmission unit 30 for transmitting a dial pulse or a push button signal output from the dialer U26 to the general public line REG. In this transmitting unit 30, the dial pulse is transmitted to the general wired line REG through the photocoupler PH5, and the push button signal is transmitted to the general wired line R through the transformer TF1.
It is transmitted to EG. Specifically, the dial pulse transmitted to the general wired line REG is generated and realized by the ON / OFF operation of the phototransistor of the photocoupler PH5. Since an AC signal (75 VAC) such as a ringing sound is also supplied from the general public line REG, a full-wave rectifier circuit SEC2 is provided between the transmission unit 30 and the general wired line REG.

As shown in FIG. 3, the FSK signal transmitting / receiving unit 24 converts the digital data from the one-chip microcomputer U17 into an FSK signal, while converting the FSK signal into digital data, and a FSK modem U19. Analog switch U32
It is composed of The digital audio processing unit 27
Is composed of signal conversion units (single-rail codecs) U12 and U13 having an AD unit and a DA unit, a digital signal processor (echo canceller) U14, and an analog switch U15 for connection switching.

The digital voice processing unit 27 realizes an echo canceller for preventing the voice uttered by itself from returning as an echo sound. The voice from the portable telephone 3 is first converted into a digital signal by the signal conversion unit U12. After being processed by the signal processor U14, the signal is converted into an analog signal again by the signal conversion unit U13 and transmitted to the key telephone 5. Similarly, the voice from the key telephone 5 is converted into a digital signal in the signal conversion unit U13, then processed by the signal processor U14, converted again into an analog signal in the signal conversion unit U12, and transmitted to the mobile telephone 3. Reportedly.

[0036] For example, through the mobile phone 3, passes Taking the case of a conversation the mobile phone and is EKT _5-1 and destination as an example, the voice from EKT _5-1, amplifier hybrid circuit U2B, the U2A In the process, the voice is mixed with the transmitted voice from the mobile phone 3. Therefore, the transmission from the cellular phone 3, before transmitting the key telephone _5-1 through the amplifier U1 hybrid circuit, leave accumulated as digital data to the signal processor U14, the transmission from the key telephone _25-1 mobile when transmitted to the phone 3, by subtracting the digital data accumulated, it convey only transmission from EKT _5-1 to the cellular phone 3. A relay is provided in the data input units SIN and RIN of the signal processor U14, and the drive unit U7
A and U31G are controlled so that only one data is input.

The level shift circuit 26 comprises the amplifiers U11, U10B and U10A shown in FIG. 3, and makes the level of the analog signal in the wireless communication adapter ADA and the level of the analog signal of the portable telephone 3 coincide. The charging control circuit 28 is a circuit for stopping the charging operation during a telephone call to prevent noise from being mixed. As shown in FIGS. 3 and 6, the charging control circuit 28 receives the pulsating voltage and shapes it into a DC charging voltage. It comprises a power supply U37, a photocoupler PH11 for short-circuiting the output voltage of the stabilized power supply U37 by an ON operation, and a driver U31A for ON / OFF operation of the photocoupler PH11.

The power supply circuit section 29 receives 100 V AC, and receives 5 V DC, ± 6 V DC, 48 V DC, and 75 V AC.
v. The AC 75v is used as a ringing sound for calling the key telephone, and the DC 48v is used.
Is the DC voltage supplied to the key telephone at the time of the OFF hook.

FIG. 6 shows a charging circuit 28 for a portable telephone.
Is illustrated. The charging circuit 28 shown in FIG. 6 includes a full-wave rectifier circuit SEC8, a stabilized power supply U37, and an output short-circuit 3
3 is comprised. The output short-circuit unit 33 includes a photocoupler PH11 and a driver U31A, and is turned on by turning on the photocoupler PH11.
Output is short-circuited. Such an operation is performed in order to prevent the superimposition of such noise, because if the charging operation to the mobile phone 3 is continued during the call operation, the noise sound accompanying the charging is superimposed on the transmission and reception sound. It is.

Next, the operation of the wireless communication adapter having the above configuration will be described. [Initial setting operation] When performing initial setting (setting of various parameters) of this adapter ADA, use the extension connection terminals JK1, JK
The key telephone 5 connected to the terminal 2 is used, the personal computer PC connected to the data output terminal CN5 is used, or the maintenance center is connected via a general wired line REG. As described above, the adapter ADA can be initialized by various methods, but usually uses the key telephone 5 capable of transmitting a push button signal.

When the key telephone 5 is used, various parameters of the wireless communication adapter ADA are set by sequentially transmitting a command and data by a push button signal. The setting items are not particularly limited, for example, whether to implement a call transfer service,
When the call forwarding service is enabled, the transfer destination telephone number, the reception sensitivity alarm level indicating whether or not the reception sensitivity level obtained from the mobile phone 3 falls below, and the battery voltage drop alarm obtained from the mobile phone 3 , Whether the alarm is issued based on out-of-service display information obtained from the mobile phone 3, whether the alarm is issued based on the device failure information obtained from the mobile phone 3, Is set from the key telephone 5 as to whether or not to issue an alert when it is recognized that the mobile telephone is connected.

When the personal computer PC is used, the program itself can be written prior to the initial setting. That is, this adapter AD
In A, since the EEPROM is used as the memory U16, the original contents of the memory can be erased and a new program can be written. Therefore, it is possible to quickly respond to changes in the times and user requests.

[0043] [originating from key telephone to destination cellular phone] Next, explaining the transmission operation from the key telephone _25-1 with reference to FIG. 4 to the go mobile phone. In the initial state, the relay RY3 is connected to the lower contact, and the relays RY2 and RY1 are connected to the upper contact. In such a state, when the key telephone _5-1 is lifted (that is, when the state shifts from the ON hook state to the OFF hook state),
DC current flows through the path of resistance R5 → transistor Q1 → light emitting diode of photocoupler PH1 → diode D1 → relay RY2 → relay RY3. Then, since the phototransistor by lighting of the light emitting diode is operated ON, 1-chip microcomputer U17 can know the OFF hook state of the key telephone _5-1.

Next, the one-chip microcomputer U17 operates at 400 Hz.
While generating a dial tone, the dial tone is transmitted to the key telephone _5-1 through a low-pass filter U24A → analog switch U8 → amplifier U1 → relay RY1 → relay RY2 → relay RY3 (see FIGS. 3 and 4) . By this operation, the key telephone _5-1 can hear the sound of "two", so that the key telephone _5-1 next inputs the telephone number of the other party. The telephone number appears as a push button signal or a dial pulse, but the push button signal is transmitted to the tone decoder U5 via the amplifier U2B → the amplifier U2A → the analog switch U9. And
The tone decoder U5 decodes the push button signal, outputs corresponding telephone number data, and transmits it to the one-chip microcomputer U17 (see FIG. 3).

On the other hand, if the dial pulse from the key telephone set _25-1 is output, in response to the pulse, the light emitting diode → diode resistor R5 → transistor Q1 → photocoupler PH1 shown in Figure 4 D1 → relay RY2 → since the series circuit of the relay RY3 → EKT _5-1 it is opened and closed, the light emitting diode blinks in response to the dial pulses. Then
The phototransistor responds to the blinking light emitting diode
Since the ON / OFF operation is performed, the one-chip microcomputer U17 receiving the output of the phototransistor can recognize the dial pulse.

As described above, even if the output from the key telephone _5-1 is a push button signal or a dial pulse, the one-chip microcomputer U17
_{Since -1} can know the telephone number to call, it is temporarily stored. If the call destination is a mobile phone, the telephone number stored before is sent to the mobile phone 3 to make a call to the telephone number. Thereafter, when the cellular phone and line of destination is established, the voice from EKT _5-1, amplifier U2B → amplifier U2A → analog switch U15 → signal converter U13 → signal processor U1
4 → signal conversion unit U12 → TX of mobile phone 3 via amplifier U11
The call is added to the terminal and transmitted to the mobile phone on the go (see FIG. 3).

On the other hand, the voice from the portable telephone at the destination is the RX terminal of the portable telephone 3, the amplifier U10A, the amplifier U10B, the signal converter U12, the signal processor U14, the signal converter U13, the analog switch U15, the amplifier U1, and the relay RY1. → Relay RY2 →
It is transmitted to the button telephone 5 _-1 through the relay RY3.

Thereafter, when the key telephone _5-1 is brought into the ON-hook state, the call current flowing through the light emitting diode is interrupted.
Can recognize the ON-hook state and send an ON-hook signal to the mobile
Will be released. Conversely, mobile phones on the go
If it goes into the ON hook state, it will be 1 by receiving the ON hook signal.
The chip microcomputer U17 recognizes that fact and performs a process of releasing the line.

[Call from Key Telephone to Outside General Telephone] Even when a call is made from the button telephone _5-1 to a general telephone outside the company, the operation until the one-chip microcomputer U17 temporarily stores the telephone number of the destination is as described above. Is the same as If the destination is a general telephone, the stored telephone number is sent to dialer U26 to generate a push button signal or a dial pulse signal of the telephone number (see FIGS. 3 and 4). . And the push button signal is
The signal is sent from the amplifier U28 to the general wired line REG via the transformer TF1. On the other hand, the dial pulse signal is applied to the light emitting diode of the photocoupler PH5 via the buffer U3 shown in FIG. When the light emitting diode flashes, the phototransistor is turned on / off to operate the general wired line RE.
A dial pulse is sent to G.

When the transmission operation of the telephone number is completed, the one-chip microcomputer U17 turns off the phototransistor of the photocoupler PH5 and moves the contact point of the relay RY3 from the lower side to the upper side (see FIGS. 5 and 4). . After that, general wired line RE
When the telephone is connected to the other party's telephone through G and the polarity of the voltage from the general wired line REG is inverted, this is detected by the loop detectors PH3 and PH4. The key telephone 5 _-1, since it is what is directly connected to the general cable channel REG, after the call operation is performed without involvement of the wireless communication adapter ADA. During a call, the loop detector RH
3, a call current flows through PH4, but when the call is terminated and the general wired line REG is opened, the one-chip microcomputer U17 can recognize that by the output change of the loop detectors RH3, PH4.

[Call of Key Telephone from Outgoing Mobile Phone] When there is a call operation from the mobile phone on the go to the mobile phone 3 of the wireless communication adapter ADA, the one-chip microcomputer U17 firstly activates the key telephone capable of talking. Check. More specifically, any of the button telephones can be used by outputting the loop detectors (PH3 and PH4) indicating the state of the terminal JK3 and the loop detectors (PH7 and PH8) indicating the state of the terminal JK4. Find out what.

[0052] Here, if the key telephone _5-1 connected to the terminal JK3 were available, one-chip microcomputer U17 is a contact of the relay RY1 in FIG 4 is moved to the lower side ringing tone (75VAC) and supplies the key telephone _5-1 (in this case, contact of the relay RY3 is positioned on the lower side). Subsequently, the key telephone _5-1 is turned off from the ON hook state.
When shifting to the F hook state, the one-chip microcomputer U17 can recognize the shift to the OFF hook state by turning on the light emitting diode of the photocoupler PH1 (ON operation of the phototransistor). Similarly, the contact of the relay RY2 is moved from top to bottom to reverse the voltage polarity of the line.

[0053] Subsequent operation is the same as for the other, the voice from EKT _5-1, amplifier U2B → amplifier U2A → analog switch U15 → signal converter U13 → signal processor U14 → signal converter U12 → amplifier Mobile phone 3 via U11
To the TX terminal of the mobile phone. On the other hand, the voice from the mobile phone on the go is the RX terminal of the mobile phone 3, the amplifier U10A, the amplifier U10B, the signal conversion unit U12, the signal processor U14, the signal conversion unit U13, and the analog switch U1.
5 → is transmitted to the button telephone 5 _-1 through an amplifier U1 → relay RY1 → relay RY2 → relay RY3.

[Call of Key Telephone from Outside General Telephone] Next, a case where a key telephone is called from a general outside telephone will be described.
In A, as shown in FIG. 3, a telephone call to terminal JK3 is connected to the key telephone at terminal JK1, and a telephone call to terminal JK4 is connected to the key telephone at terminal JK2. I have. The specific operation is as follows.

When a call is received through the general wired line REG, a ringing sound is first sent from the general wired line REG.
Is off.) In the following, the ringing sound is transmitted to the full-wave rectifier circuit SEC1 through the resistor R79 and the capacitor C66, and blinks the light emitting diode of the photocoupler PH9. Then, this blinking operation of the light emitting diode is transmitted to the one-chip microcomputer U17 through the phototransistor of the photocoupler PH9, so that the one-chip microcomputer U17
You can know that the key telephone on the 1 side is being called.

Therefore, the one-chip microcomputer U17 controls the driver U7B of FIG. 4 to move the two contacts of the relay RY3 from the lower side to the upper side. Then, the general wired circuit REG and JK1
Since the side of the key telephone set _5-1 it is connected, since, so that the ringing tone is transmitted to the key telephone _25-1.
The subsequent operation is the same as that when a call is received from a general wired line REG to a general key telephone. That is, if the key telephone _5-1 is shifted to the OFF hook state, normal transmission / reception operations can be performed without being controlled by the one-chip microcomputer U17.

[Operation when the transfer mode is set] Next, the case where the wireless communication adapter ADA is set to the transfer mode will be described. The wireless communication adapter ADA is initialized from the key telephone 5 or a personal computer, and the transfer destination telephone number is set together with the initial setting data. In other words, in the case of the wireless communication adapter ADA that can also operate the transfer mode, the one-chip microcomputer U
Reference numeral 17 stores the transfer destination telephone number in advance.

When a ringing sound is supplied to the wireless communication adapter ADA set in the transfer mode through the terminal JK3, the one-chip microcomputer U17 confirms the ringing sound through the photocoupler PH9, and then checks the corresponding telephone. Enter the number (phone number of the mobile phone on the go) to mobile phone 3.
To send to. Specifically, the transfer destination telephone number is transmitted through the serial data output terminal TX1 of the one-chip microcomputer U17, and the transmission to the number is instructed.

Then, the mobile phone 3 calls the corresponding mobile phone at the destination, so after the transmission / reception line is established between the mobile phone 3 and the mobile phone at the destination, the mobile phone 3
To perform a transmission / reception operation. That is, the audio from the general wired line REG is amplified via the transformer TF1.
Transmitted to U30A, amplifier U30B → analog switch U15 →
Signal converter U13 → Signal processor U14 → Signal converter U1
2 → Amplifier U11 is added to the TX terminal of mobile phone 3,
It is transmitted to the mobile phone where you are going.

On the other hand, the voice from the mobile phone at the destination appears on the RX terminal of the mobile phone 3, and the amplifier U19A → the amplifier U10B →
Signal converter U12 → signal processor U14 → signal converter U1
3 → Analog switch U15 → Amplifier U28 → Transfer to the general wired line REG via the transformer TF1.

[When Transmitting Stored Data to the Maintenance Center] When transmitting stored data to the maintenance center CEN, the stored data output from the one-chip microcomputer U17 is converted into an FSK signal by the FSK modem U19, Via U32, amplifier U28 (U29) → transformer T
F1 (TF2) → transmitted to the personal computer 1 of the maintenance center CEN through the route of the general wired line REG (FIG. 3).

On the other hand, commands from the maintenance center CEN are transmitted by the modem 2 connected to the personal computer 1.
The signal is converted into an FSK signal and transmitted to the wireless communication adapter ADA through the general wired line REG. And transformer TF1 (TF2)
The signal is transmitted to the FSK modem U19 via the path from the amplifier U30A (U33A) to the analog switch U32, where the FSK signal is converted into digital data and supplied to the one-chip microcomputer U17.

As described above, in this embodiment, the communication between the maintenance center CEN and the wireless communication adapter ADA is performed by the FSK signal, so that accumulated data can be collected with a simple circuit configuration. Specifically, it is sufficient to provide only the FSK signal transmission / reception circuit 24. However, transmission of stored data is not limited to FSK signals,
Other modulation schemes may be adopted, and there is no need to limit to analog signals. For example, if devices and circuits capable of transmitting and receiving digital data to and from the one-chip microcomputer U17 are prepared, accumulated data can be collected by data transmission between the maintenance center CEN and the one-chip microcomputer U17.

[When Reading Stored Data from the Maintenance Center] When reading stored data from the maintenance center CEN, the maintenance center CEN first calls the mobile phone 3. On the other hand, in the mobile phone 3, since the telephone number of the caller can be known (the caller ID notification service is being enjoyed), the one-chip microcomputer U17 recognizes that a call has been received from the maintenance center CEN. it can. Then, the one-chip microcomputer U17
Returns the confirmation of the call from the maintenance center CEN and disconnects the telephone line.

Thereafter, the one-chip microcomputer U17 calls the maintenance center CEN anew and sends the stored information to the maintenance center CEN by the FSK signal.
Specifically, the stored data is stored in FSK modem U19.
The signal is converted to a signal and passed through the analog switch U32 to the amplifier U.
28 (U29) → Transformer TF1 (TF2) → Information is transmitted to the personal computer 1 of the maintenance center CEN via the route of the general wired line REG.

[Assignment of Setting Data from Maintenance Center] On the other hand, the maintenance center CEN can set various data to the wireless communication adapter ADA. Various data are transmitted together with the command. These data are converted into FSK signals by the modem 2 connected to the personal computer 1 and transmitted to the wireless communication adapter ADA through the general wired line REG. And the transformer TF1 (TF
2) The signal is transmitted to the FSK modem U19 via the path from the amplifier U30A (U33A) to the analog switch U32, and the FSK signal is converted into digital data and supplied to the one-chip microcomputer U17.

Although the embodiment of the present invention has been described above, the specific configuration and operation shown in the embodiment do not particularly limit the present invention. That is, the gist of the present invention is to monitor the operation state of the attached wireless telephone, and various changes can be made without departing from the gist of the present invention.

[0068]

As described above, according to the present invention,
It is possible to realize a remote monitoring system that constantly monitors the quality of communication by the wireless communication adapter and can quickly ascertain the cause of the trouble at the maintenance center, including the cause.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a remote monitoring system according to an embodiment.

FIG. 2 is a schematic configuration diagram of a wireless communication adapter according to the embodiment.

FIG. 3 is a configuration diagram showing FIG. 2 in a little more detail;

FIG. 4 is a circuit diagram showing a part of a pseudo-wire network.

FIG. 5 is a circuit diagram showing a part of a network control circuit unit.

FIG. 6 is a circuit diagram showing a charging unit.

[Explanation of symbols]

 3 Wireless telephone (mobile phone) 5 General telephone (button telephone) REG General wired communication line ADA Wireless communication adapter

Continued on the front page F-term (reference) 5K027 AA11 BB04 EE04 LL00 5K048 AA05 AA06 BA31 DC01 DC07 EB08 5K067 AA26 BB02 BB27 EE02 EE10 EE16 HH05 HH21 LL01 LL05 5K101 KK14 LL12 MM03 RR04 MM06 RR

Claims (6)

[Claims] 1. A wireless system in which a general telephone is connected to a wired communication line, the general telephone is connected to a wireless telephone, and a telephone call between the external telephone and the general telephone is enabled via the wireless telephone. A communication adapter, comprising: monitoring means for constantly monitoring the operation state of the wireless telephone; and transmission means for recognizing a situation detected by the monitoring means in another place. Communication adapter. 2. The wireless communication adapter according to claim 1, wherein said transmission means includes a communication line and a signal conversion unit corresponding to said communication line. 3. The wireless communication adapter according to claim 2, wherein bidirectional communication is realized on said communication line. 4. The wireless communication adapter according to claim 1, wherein said monitoring means monitors presence or absence of a failure of said wireless telephone and reception level information of said wireless telephone. 5. The wireless communication adapter according to claim 1, wherein said monitoring means monitors a call charge of said wireless telephone and performs cumulative calculation. 6. A wireless communication system in which a general telephone is connected to a wired communication line, and the general telephone and a radio telephone are connected to each other so that a telephone call between the external telephone and the general telephone can be made via the radio telephone. And a maintenance center connected through a communication line. The wireless communication adapter includes monitoring means for constantly monitoring the operating state of the wireless telephone, and the maintenance center recognizes a situation detected by the monitoring means. A remote monitoring system provided with a transmission means for performing the communication.