JP2838071B2 - Outgoing adapter for wireless communication - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission adapter capable of establishing a wireless communication line at any time as required, and more particularly, to a transmission adapter which makes effective use of a general-purpose mobile phone.
The present invention relates to a simple type of transmission adapter capable of promptly informing of a damage situation at the time of a disaster.

[0002]

Not to mention the actual example of the 1995 Great Hanshin Earthquake,
It is important to notify the disaster situation from the disaster area to the outside without delay. However, in the event of a major disaster, the wired communication line between the affected area and the outside is often cut off. For this reason, for example, it is not possible to promptly communicate the damage situation of the branch office to the head office, or information from local governments Was not quickly transmitted to the center. In such a case, it is most desirable that wireless communication can be performed at any time from a key telephone set disposed at each desk of a company or government office, as needed. The present invention has been made based on this idea, and provides a transmission adapter for wireless communication that can reliably and quickly establish a wireless communication line even when a wired communication line is interrupted. The purpose is to do. It is also an object of the present invention to provide a simple type wireless communication transmission adapter that can be used from a general telephone such as a key telephone and can be used not only at the time of a disaster but also on a regular basis, and at a low running cost. And

[0003]

In order to achieve the above object, an invention according to claim 1 is a transmission adapter which connects a general telephone and a radio telephone to enable radio transmission from the general telephone. A signal transmission path for supplying a DC voltage to a general telephone, transmitting a dial signal and an audio signal from the general telephone, and an audio signal from a wireless telephone, and transmitting the audio signal from the general telephone to the signal transmission path. And transmitting the signal to the wireless telephone, while receiving an audio signal from the wireless telephone and transmitting the signal to the signal transmission path, and a general telephone changed to an off-hook state and transmitted to the signal transmission path. A line monitoring unit for detecting that a call current has flowed, a dial recognition unit for recognizing a dial signal transmitted from the ordinary telephone to the signal transmission path, and an operation of each unit of the above-described device. It consists of a Gosuru control unit, based on information from the line monitoring unit, first means for starting call preparing operation radiotelephone, then
Second means for making the wireless telephone make a dial call based on the information from the dial recognizing unit, and after the wireless telephone is connected to the other telephone, controlling the voice signal unit to control the voice between the ordinary telephone and the other telephone. Third means for transmitting and receiving signals. In the present invention, a general telephone
Is a telephone that implements wired communication, and is typically
These are key telephones provided at desks of companies and government offices.

[0004] A second aspect of the present invention relates to a calling system in which a general telephone is connected to a wired communication line, and the general telephone is connected to a radio telephone so that radio transmission from the general telephone is enabled. When the two switching circuits are in the first state, the adapter supplies a DC voltage to a general telephone and transmits a dial signal and a voice signal from the general telephone and a voice signal from the wireless telephone. On the other hand, when the two switching circuits transition from the first state to the second state, the DC voltage supplied up to that time is cut off, and the DC voltage supplied from the wired communication line is supplied to a general telephone. A transmission path, receiving an audio signal from a general telephone from the signal transmission path and transmitting the signal to the wireless telephone, receiving an audio signal from the wireless telephone and transmitting the signal to the signal transmission path; A voice signal section to be transmitted, a line monitoring section for detecting that a general telephone changes to an off-hook state and a call current flows through the signal transmission path, and recognizes a dial signal transmitted from the general telephone to the signal transmission path. Dial recognition unit, and a control unit that controls the operation of each unit of the device described above, the control unit, in the initial state,
Initial means for setting the two switching circuits to a first state;
A tone transmitting unit that operates based on information from the line monitoring unit and transmits a tone signal to the signal transmission path; and thereafter operates based on information from the dial recognizing unit to transmit the signal from a general telephone. Storage means for storing the telephone number transmitted to the transmission line, and determining means for analyzing the stored telephone number to determine whether the user of the general telephone desires wireless communication or wired communication When the user desires wireless communication, the stored telephone number is sent to the wireless telephone, and thereafter, the wireless telephone and the general telephone are transmitted via the signal transmission path and the voice signal section. Wireless communication means for realizing wireless communication with the other telephone by relaying the wireless telephone, and when the user desires wired communication, the two open / close circuits are switched from the first state. In the second state Causes transferred, sends the telephone number stored in the wired communication line, after that, and a wired communication means for implementing a wired communication with the other party telephone via a wired communication line. In the present invention, it is only necessary to input the telephone number of the other party according to the normal processing. Since this telephone number is stored and determined by the determination means, the control unit can know whether the user desires wireless communication or wired communication. Then, a wire communication line or a wireless communication line can be established as desired.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail with reference to embodiments. [First Embodiment] FIG. 1 shows an outgoing adapter 1 according to an embodiment of the present invention.
FIG. In practice,
The transmission adapter 1 includes a key telephone main unit and a PBX (pri
3 are connected via a vate branch exchange. However, for convenience of explanation, it is assumed that one button telephone 3 is directly connected to the transmission adapter 1. When a specific button is pressed on the key telephone 3, the calling adapter 1
And a mobile telephone 2 in a state of being directly connected to each other to establish a public communication line by a wireless line. As shown, the transmission adapter 1 includes a circuit connection unit 4 for connecting the transmission adapter 1 and the key telephone 3, and an audio signal unit 5 for transmitting and receiving an audio signal between the mobile phone 2 and the circuit connection unit 4.
And a control section 6 for controlling the operation of each section of the apparatus. The circuit connection unit 4 supplies a DC voltage to the key telephone 3 and transmits an AC signal to the key telephone 3, a forced cutoff unit 8 for forcibly interrupting the conduction of the signal transmission line 7, and transmission from the key telephone 3. Detecting unit 9 for detecting a dial pulse (DP) to be transmitted via a photocoupler
And the push button (P
The B) signal is composed of a tone receiver 10 for receiving through the transformer T _2. The photocoupler is, specifically, a light emitting diode D and a phototransistor Tr.
It is composed of The detecting unit 9 has a line monitoring function of detecting the presence of a call current by turning on the light emitting diode D, and a DP pulse counter function of detecting a dial pulse (DP) from the blinking state of the light emitting diode D. . Signal transmission path 7 described above is connected to a DC power supply unit 11 via the transformer T _1, key telephone 3
When a primary side of the transformer T _2, a light emitting diode D, is a closed circuit with forced blocking portion 8 is formed. In addition, the forcible cut-off section 8 specifically includes a relay coil 8a and a relay contact 8b. In this example, the relay contact 8b is opened by energizing the relay coil 8a, and the conduction of the signal transmission path 7 is cut off. It is supposed to be. The audio signal unit 5
A first amplifier 12 amplifies an audio signal from the mobile phone 2 and transmits the same to the transformer T _1, and a second amplifier 13 amplifies the audio signal from the transformer T ₁ and transmits the same to the mobile phone 2. For simplicity, the extraction terminal 5a of the audio signal unit 5 may be connected to the earphone terminal 2a of the mobile phone 2. The first and second amplifiers 12 and 13 supply the input level signals S ₁ and S ₂ to the control unit 6, while receiving the control signals CT ₁ and CT ₂ from the control unit 6. Here, the input level signals S ₁ and S ₂ correspond to the amplifiers 12 and 13 respectively.
Is a signal obtained by averaging the AC input signal to each amplifier.
This is a signal for the control unit 6 to monitor whether or not the input levels to the signals 2 and 13 have exceeded the threshold value. The control signals CT ₁ and CT ₂ are ON / OFF signals for determining whether or not the amplifiers 12 and 13 function as amplifiers.
The amplifiers 12 and 13 perform a predetermined amplifying operation when receiving an ON signal from the control unit 6, but perform an amplifying operation when receiving an OFF signal.
It does not output any signal. Control unit 6
Is a computer circuit including a microcomputer including a CPU, a ROM, a RAM, and the like, and an interface unit including an AD converter, a DA converter, and the like.
The following control operation is realized according to the control program stored in the ROM. Hereinafter, the operation of the transmission adapter 1 will be described.

(1) Standby state In the standby state, the hook switch HS of the key telephone 3
Is in an open (ON hook) state, and the DC voltage of the DC power supply unit 11 is supplied to the key telephone 3 via the signal transmission path 7. However, since the hook switch HS is open, no call current flows, and the light emitting diode D is off. In this standby state, the mobile phone 2 is in a standby state with the power on, and the control unit 6
Recognizes the off state of the light emitting diode D based on a signal from the detection unit 9 which is performing the line monitoring function. (2) Call preparation state If it is desired to establish a wireless communication line for some reason, the handset of the key telephone 3 should be picked up and a specific button set for wireless communication should be pressed. Then, the hook switch HS enters a closed (OFF hook) state, so that the DC communication current from the power supply unit 11 is supplied to the signal transmission path 7.
And the light emitting diode D is turned on. Then, the control unit 6 recognizes the presence of the call current based on the signal from the detection unit 9 which is performing the line monitoring function,
A transmission signal is transmitted to the mobile phone 2 via the TR. The mobile phone 2 that has received the transmission signal outputs a dial tone (DT) signal to the audio signal unit 5 after checking the radio wave condition. This operation is an operation generally realized in a commercially available mobile phone (for example, cellular HD-30K). When a dial tone (DT) signal is supplied to the audio signal unit 5, the control unit 6
, By the level value of the input level signals S ₁ exceeds the threshold value, it is possible to recognize it. Therefore,
Control unit 6, whereas for the amplification to the first Ambrose 12 sends a control signal CT ₁ of the ON level, and sets the second amplifier 13 by sending a control signal CT ₂ of OFF level in the non-operating state. Dial tone (DT) signal amplified by the first amplifier 12 via the transformer T _1, is transmitted to the signal transmission line 7, dial tone (DT) signal called "two" is generated from the key telephone 3 . (3) Dial operation When the telephone number of the other party is input to the key telephone 3, a push button (PB) signal is transmitted to the signal transmission path 7 depending on whether the telephone is a push button type or a dial pulse type. Alternatively, a dial pulse (DP) signal is output. The push button (P
B) The signal discriminates the numbers 0 to 9 according to the frequency of the transmitted signal, and the dial pulse (DP) signal discriminates the numbers 0 to 9 according to the number of transmitted pulses. Signal Puyushubotan (PB) signals sent to the transmission line 7 is transmitted to the tone receiver 10 through the transformer T _2, whereas, dial pulse (DP) signal via the photocoupler functions as a DP pulse counter detects It is transmitted to the part 9. However, in any case, the control unit 6 controls the tone receiver 10 or the detection unit 9
Can recognize the telephone number of the other party to be called. After recognizing the telephone number of the other party to be called, the control unit 6 performs necessary signal conversion processing, and then sends a dial signal (uplink serial signal) to the mobile phone 2 via the control signal line CTR. Thereafter, the mobile phone 2 transmits a dial signal from the antenna 2b.
In addition, the mobile phone 2 sets
The ringback tone is output to the audio signal unit 5. In addition,
These operations are also operations generally realized by a commercially available mobile phone. In this state, the first amplifier 12 realizes a predetermined amplification operation, so that the ringback tone is
Through the transformer T ₁ is transmitted to the signal transmission path 7, also transmitted to the key telephone 3. (4) Talking Operation After that, when the other party to be called picks up the telephone, the other party's telephone and the key telephone 3 are connected via the mobile phone 2, the voice signal unit 5, and the signal transmission path 7. Obviously, the transmission from the key telephone 3 via the transformer T _1, reportedly from the signal transmission line 7 to the audio signal 5 is transmitted to the cellular phone 2 is amplified by the second amplifier 13. Then, the mobile phone 2 transmits the transmission signal to the other party's telephone via the wireless communication line. During a call operation, if the call between the other party's telephone and the mobile phone 2 is disconnected due to a poor radio wave condition or the like, the mobile phone 2 notifies this via the control signal line CTR. 6 forcibly cuts off the signal transmission path 7 by operating the relay coil 8a. When the signal transmission path 7 is cut off, the key telephone 3 enters a silent state, so that when the handset is returned, the hook switch HS returns to the initial state. (5) When the call is completed When the handset of the key telephone 3 is returned after the call operation is completed normally, the hook switch HS is opened (ON hook).
As a result, the signal transmission path 7 is opened. Then, the talk current in the signal transmission line 7 is cut off, and the light emitting diode D is turned off. Therefore, the control unit 6 can recognize the fact via the detection unit 9 which is performing the line monitoring function. Then, the control unit 6 sends an end signal to the mobile phone 2 via the control signal line CTR,
Cuts off the wireless communication line with the other party. As mentioned above,
If the transmission adapter 1 shown in FIG. 1 is used, a wireless communication line can be constructed only by pressing a specific button of the key telephone 3, so that it is possible to appropriately cope with a disaster or the like. In addition, when calling a mobile phone, the line usage fee is lower than when calling from a general telephone. Therefore, if the calling adapter 1 of the present invention is used on a daily basis, the communication cost of the company is constantly reduced. You can also save money.

[Second Embodiment] FIG. 2 shows a second embodiment of the present invention, in which the construction of a wired communication line and the construction of a wireless communication line are performed only by the telephone number from the key telephone 3. The transmission adapter 1A which can be arbitrarily selected is illustrated. The feature of this embodiment is that the signal transmission line 7 is provided with circuit switching units R ₁ and R ₂ , and the construction of the wired communication line and the wireless communication line is arbitrarily switched. points to connect it to the transformer T _1, NTT (trademark) that provided the delivery relay R ₃ for delivering a dial pulse signal to the wire line, for delivering a push-button signal to the NTT wire line that provided the transformer T _3, control unit 6A
In that a dial number storage function is provided. In response to this feature, the control unit 6A includes control signals CT ₅ and CT ₆ for controlling the circuit switching units R ₁ and R ₂ and a control signal CT for controlling the operation of the pseudo tone generating unit 14.
_3, a control signal CT ₄ for controlling the delivery relay R _3, and outputs appropriately. Note that other control signals CT
_{1 to} CT ₃ function in the same manner as in the first embodiment. Hereinafter, the operation of the transmission adapter of FIG. 2 will be described. (1) Standby state In the standby state, the circuit switching units R ₁ and R ₂ are in the state shown in the figure, so that the key telephone 3 and the NTT line are
It is open at the position of the circuit switching unit R _1. on the other hand,
DC voltage of the DC power supply unit 11, through the transformer T ₂ → the light emitting diode D → signal transmission line 7 composed of a path of the relay contact 8b → circuit switching unit R _2, is supplied to the key telephone 3. However, since the hook switch HS of the key telephone 3 is open, no call current flows, and the light emitting diode D is off. (2) Preparation for calling After that, when the handset of the key telephone 3 is lifted, the hook switch HS is closed (OFF hook).
The DC communication current from the power supply unit 11 flows through the signal transmission line 7 to light the light emitting diode D. Then, the control unit 6A
Recognizes the presence of a call current based on a signal from the detection unit 9. Next, the control unit 6A varies the control signal CT ₃ to start the operation of the pseudo tone generator 14. The dial tone signal from the pseudo tone generator 14 is
_Since the signal is transmitted to the signal transmission path 7 via the key ₁ , the dial telephone signal "two" is generated from the key telephone 3. (3) Dialing operation On the key telephone 3 side, use a wired communication line,
What is necessary is just to arbitrarily select whether to use a wireless communication line and input a necessary telephone number. When a wireless communication line is to be used, a special number (for example, 00
(Special numerical value such as 0). The telephone number from the key telephone 3 is input to the tone receiver 10 or the detection unit 9 according to the push button (PB) signal or the dial pulse (DP) signal. Therefore, the control unit 6A
Stores this telephone number in its internal memory and analyzes the telephone number. Specifically, it is determined whether or not the first three digits are special numerical values. [When a special numerical value is added] As a result of analyzing the telephone number, if the first three digits are a special numerical value, the control unit 6
A performs necessary signal conversion processing, and then controls the control signal line CTR.
, A dial signal (uplink serial signal) excluding the special numerical value is transmitted to the mobile phone 2. The subsequent operation is the same as that described in the first embodiment, and the key telephone 3 realizes wireless communication with the other telephone via the mobile telephone 2. [If no special numerical value is added] As a result of analyzing the telephone number, if the first three digits are not a special numerical value, the control unit 6A first changes the control signals CT ₅ and CT ₆ ,
The operation state of the circuit switching units R ₁ and R ₂ is reversed from the state shown in the figure. By this operation, the DC power supply unit 11 is disconnected from the signal transmission line 7, but the signal transmission line 7
Since a DC voltage is supplied from the wired line, no problem occurs. Subsequently, the control unit 6A, either output Puyushubotan (PB) signal through the transformer T _3, or by opening and closing the delivery relay R ₃ outputs a dial pulse (DP) signal by the control signal CT _4. The signal output to the NTT line corresponds to the telephone number of the other party stored in the control unit 6A, and thereafter, ordinary public communication using the NTT wired communication line is realized. Above, NTT
A description has been given of the use mode of the transmission adapter 1A that allows a general telephone and a mobile phone to be called using a wired communication line, and allows the general telephone and the mobile phone to be called via the mobile phone 2. However, if you want to use the transmission adapter 1A regularly and use it effectively,
It is preferable to use an NTT wired communication line when making a call to a general telephone, and to use a wireless communication line via the mobile phone 2 when making a call to a mobile phone. When the usage mode is limited in this way,
Since there is no need to add the above-mentioned special numerical value, the user only has to enter a normal telephone number without being aware of anything. That is, 030, 040, 08
Only when a mobile phone number starting from 0,090 is input, a wireless communication line is established. In this case, the control unit 6A replaces the special numerical value with 03
Since it is sufficient to determine only the presence or absence of 0, 040, 080, 090, it is preferable from this point. Thus, the second
In the case of the embodiment, just enter the phone number normally,
It is possible to select between normal wired communication and wireless communication via a mobile phone. When communicating with the mobile phone, the communication cost is lower when the call is transmitted from the mobile phone, so that the communication cost can be reduced by using this system regularly. Since a commercially available wireless telephone is effectively used, the present system can be completed with a minimum investment.

[0008]

As described above, according to the present invention,
Wireless communication can be performed from a general telephone at any time as needed. Therefore, even if the wired communication line is cut off, the disaster situation and the like can be appropriately and appropriately transmitted to the outside from the key telephones arranged at each desk of the company or government office. Since the wireless communication line can be used not only at the time of disaster but also on a regular basis, communication costs for companies can be saved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention.

FIG. 2 is a block diagram showing a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transmission adapter 2 Wireless telephone (mobile telephone) 3 General telephone (button telephone) 5 Audio signal part 6, 6A control part 7 Signal transmission line 9 Line monitoring part, dial recognition part (detection part) 10 Dial recognition part (tone receiver)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) H04M 11/00 H04M 1/26 H04M 15/00 H04Q 7/38 H04M 3/42

Claims (4)

(57) [Claims] 1. Connecting a general telephone and a wireless telephone,
A transmission adapter that enables wireless transmission from a general telephone, supplies a DC voltage to the general telephone, and transmits a dial signal and a voice signal from the general telephone and a voice signal from the radio telephone. A transmission path, receives an audio signal from a general telephone from the signal transmission path and transmits it to the wireless telephone, while receiving an audio signal from the wireless telephone and transmits this to the signal transmission path; A line monitoring unit that detects that a general telephone changes to an off-hook state and a call current flows in the signal transmission line; a dial recognition unit that recognizes a dial signal transmitted from the general telephone to the signal transmission line; And a control unit for controlling the operation of each unit of the device described above, the control unit, based on information from the line monitoring unit,
First means for causing the wireless telephone to start a call preparation operation, second means for causing the wireless telephone to make a dial call based on information from the dial recognizing unit, and the voice communication after the wireless telephone is connected to the other telephone. A third means for controlling a signal unit to transmit and receive a voice signal between the general telephone and the other telephone, and a transmission adapter for wireless communication. 2. A general telephone set is connected to a wired communication line, and the general telephone set is connected to a wireless telephone set.
A transmission adapter that also enables wireless transmission from the general telephone, wherein when the two switching circuits are in the first state, a DC voltage is supplied to the general telephone, and a dial signal and voice from the general telephone are supplied. And when the two switching circuits transition from the first state to the second state, the DC voltage supplied so far is cut off and the wired communication line is transmitted. A signal transmission path for receiving a DC voltage from the telephone line and supplying it to a general telephone, receiving an audio signal from the general telephone from the signal transmission path and transmitting the signal to the wireless telephone, while receiving an audio signal from the wireless telephone, An audio signal unit for transmitting the signal to the signal transmission line, a line monitoring unit for detecting that a general telephone changes to an off-hook state and a call current flows in the signal transmission line, A dial recognition unit that recognizes a dial signal transmitted from the general telephone to the signal transmission path, and a control unit that controls the operation of each unit of the device described above,
An initial unit for setting the two switching circuits to a first state in an initial state; and a tone for operating based on information from the line monitoring unit and transmitting a tone signal to the signal transmission path. Sending means, and thereafter operating based on information from the dial recognition unit, storing means for storing a telephone number transmitted from the ordinary telephone to the signal transmission path, and analyzing the stored telephone number, Determining means for determining whether the user of the general telephone desires wireless communication or wired communication; and, if the user desires wireless communication, the stored telephone number is transmitted to the wireless telephone. Wireless communication means for connecting the wireless telephone and the general telephone via the signal transmission path and the audio signal unit, and relaying the wireless telephone to realize wireless communication with the other telephone. , If the user wants to wired communication, as well as shifts the two close circuit to the second state from the first state,
A wired communication means for transmitting the stored telephone number to a wired communication line, and thereafter realizing wired communication with the other party's telephone via the wired communication line. adapter. 3. The transmission adapter according to claim 1, wherein the wireless telephone is a general-purpose mobile telephone. 4. The audio signal unit and the signal transmission path,
The transmission adapter according to any one of claims 1 to 3, wherein the transmission adapter is electromagnetically coupled.