JPH01320835A - Radio telephone system - Google Patents

Abstract

PURPOSE:To reduce a trouble to other subscriber by continuing the transmission and reception of a connector as it is without stopping it when other radio telephone set of the connector in busy state is set in mistake. CONSTITUTION:When a subscriber whose call is finished places its radio telephone set 4' on a connector 2' other than the connector in pairs with the set 4' in error, live terminals 53, 33 contact and a battery 54 is charged by the connector 2'. Then a voltage drop between the live terminals 55 is detected by a comparator 60 and informed to a control circuit 52'. Then an ID code of its own set decided in advance is fed from the control circuit 52' to the connector 2'. The ID code is dissident with its own ID code set in advance, then the control circuit 31' discriminates it that a different radio telephone set 4' is placed and the transmission and reception is made continued as it is when its own equipment is in transmission and reception state.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention (Field of Industrial Application) The present invention relates to an improvement in a wireless telephone device connected to a wired line such as a subscriber line.

(Prior Art) Conventionally, there are the following devices as this type of device. FIG. 2 shows its configuration. This device includes a connecting device 2 connected to a subscriber line 1 or an extension line of a private branch exchange;
The wireless telephone 4 is connected to the connecting device 2 via a wireless line 3.

The connection device 2 includes a transmitter (TX) 22 and a receiver (RX) 2B, in which transmission and reception channels are specified by a synthesizer (SYN) 21, and receives a call from the other party's terminal via the subscriber line 1 during a call. After passing through the line relay 24 and the hybrid circuit 25, the signal is modulated by the transmitter 22 and sent from the transmitting antenna 26 to the radio line 3, and the radio communication signal that has arrived from the radio telephone 4 via the radio line 3 is sent to the receiving antenna 27. After demodulating in the receiver 23 via the above hybrid circuit 25 and line relay 24
It is sent to subscriber line 1 via.

In addition, this connection device 2 serves as a circuit necessary for connection between the subscriber line 1 and the wireless telephone 4.
It includes an incoming call detection circuit 28 that detects a Hz calling signal and a control circuit (CONT) 31. Among these, the control circuit 31 has, for example, a microcomputer as a main control section, and performs various connection controls related to connection operations. In addition, 32 is a rectification stabilization circuit, which outputs commercial power (AC
A predetermined operating voltage VCC is generated from Vcc) and supplied to each part within the device, and is also supplied to the wireless telephone 4 as a charging voltage via a charging resistor 34 and a charging terminal 33.

On the other hand, the wireless telephone 4 is equipped with a transmitter (TX) 42 and a receiver (RX) 43 for which transmission and reception channels are specified by a synthesizer (SYN) 41, similar to the connection device 2 described above. The incoming wireless communication signal is received and demodulated by the receiver 43 via the receiving antenna 44, and then outputted as voice from the receiver 45, and transmitted to the transmitter 46.
After modulating the speech signal input from the transmitter 42, it is sent to the wireless line 3 via the transmitting antenna 47. Furthermore, this radio telephone 4 includes a control circuit (main controller) which includes a transmission switch 48, a dial key 49, and a microcomputer and performs various connection controls as circuits necessary for connection between the connection device 2 and an exchange (not shown). , C0N
T) 52 and a sounder 53 that generates a sound. Reference numeral 54 denotes a battery that supplies an operating voltage VCC to various parts within the radio telephone, and is charged by the operating voltage VCC supplied from the connecting device 2 through a charging terminal 55 and a backflow prevention diode 56 during standby.

In such a configuration, when an incoming call first occurs, the connection device 2 detects the occurrence of the incoming call with the incoming call detection circuit 28, and the control circuit 31 instructs the synthesizer 21 to use an empty transmission/reception channel, and the transmitter 22 and receiver 23 are operated to send an incoming call signal to radio telephone 4. On the other hand, the radio telephone 4 performs an intermittent reception operation with the receiver 43 while on standby, and in this state, when the above-mentioned incoming signal for itself arrives from the connection device 2, the control circuit 52
The transmitter 41 instructs the transmitter/receiver channel to set the transmitter 42 and the receiver 43 in a continuous operating state, and then returns the incoming call response signal to the connecting device 2, and generates a ring tone from the sounder 53 to receive the call to the subscriber. Notify the occurrence. When the subscriber responds to this call by turning on the calling switch 48, the transmitter 42 of the radio telephone 4 sends a message to that effect to the connecting device 2, and as a result, the connecting device 2 turns on the line relay 24. Thus, a connection is established between the wireless telephone 4 and the caller, and communication between the two is possible thereafter.

On the other hand, in the standby state, when the subscriber turns on the transmission switch 48 of the radio telephone 4, the radio telephone 4 uses the control circuit 52 to instruct the synthesizer 41 to a specific transmission/reception channel, thereby transmitting the transmitter 42 and the receiver 43. are operated continuously, and a transmission signal is sent to the connection device 2. On the other hand, when a calling signal arrives from the wireless telephone 4, the connecting device 2 detects this calling signal with a control circuit 31, creates a calling response signal, and sends this calling response signal to the transmitter 22 along with the instruction information of the transmission/reception channel. The information is then sent back to the radio telephone 4, thereby causing the radio telephone 4 to set a transmission/reception channel for telephone calls. After this control, the line relay 24 is turned on to close the DC loop of the subscriber line 1. Further, when the subscriber inputs the telephone number of the other party using the dial key 49 in this state, the wireless telephone 4 sends the dial information from the transmitter 42 to the connecting device 2 via the wireless line 3. As a result, the control circuit 31 of the connection device 2 controls the opening and closing of the line relay 24 in accordance with the above-mentioned dial information to transmit dial pulses to the subscriber line 1. Thus, only the desired party is called, and if the called party responds to the call, the wireless telephone 4 and the called party are subsequently connected and communication becomes possible.

That is, by using such a device, it is possible to make a call in exactly the same way as when using a normal wired telephone that is directly connected to the subscriber line 1.

Incidentally, recently, devices of this type have been provided with a circuit for preventing the transmission of unnecessary radio waves when not making a call. This circuit is comprised of a comparator 35 and a reference power supply (output voltage VB), for example, as shown in FIG.

Then, the wireless telephone 4 is placed on the connecting device 2, and the voltage drop between the charging terminals 33 that occurs when the connecting device 2 starts charging the battery 54 of the wireless telephone 4 is detected by the comparator 35, This detection result is notified to the control circuit 31. When the control circuit 31 receives the voltage drop detection signal from the comparator 35, it determines that the call has ended and the wireless telephone 4 has been placed on the connection device 2, and that the wireless telephone 4 is still transmitting radio waves at this time. If so, it stops transmitting this radio wave and returns to standby mode. The reference voltage VB of the comparator 35 is, for example, the voltage drop in the backflow prevention diode 56 and the battery 54, respectively. , Vbat, Vs - (Vcc + V
It is sufficient to set it to D + Vbat)/2.

Therefore, when the subscriber ends a call, even if the wireless telephone
Even if you forget to turn off the transmitter switch 48 of the wireless telephone 4, connect the wireless telephone 4 to the connecting device 2. If you place it in , it will automatically stop transmitting radio waves and return to standby mode.

(Problems to be Solved by the Invention) However, conventional devices equipped with such unnecessary radio wave transmission prevention means have the following problems. That is, for example, when this type of wireless telephone device is connected to a private branch exchange, line control device, etc. and used as an extension telephone,
When multiple radiotelephone devices are placed relatively close together, a subscriber may accidentally place the radiotelephone on another connected device during a call after the subscriber ends a call. If such an erroneous operation is performed, the above-mentioned unnecessary radio wave transmission prevention means is activated and the connection device 2 stops the communication operation. For this reason, the subscriber of the wireless telephone 4 paired with the connecting device 2 would have his call suddenly interrupted during a call, which was very undesirable.

The present invention focuses on this point, and provides a wireless telephone device that does not immediately stop calls even if another wireless telephone is mistakenly placed on another connection device, thereby reducing the inconvenience to other subscribers. The purpose is to provide.

[Structure of the Invention] (Means for Solving the Problems) The present invention comprises a connection device connected to four wired lines, and a wireless telephone connected to the connection device via a wireless line. In a wireless telephone device, the battery of the wireless telephone is charged by the power supply of the connecting device when the telephone is set in a predetermined state in the connecting device, and at least one of the connecting device or the wireless telephone is charged with a wireless power when the wireless telephone is set in the connecting device. an identification information transfer means for transmitting and receiving predetermined unique identification information between the telephone and the connecting device; an identification information matching means for comparing the identification information with its own identification information when the identification information is sent; A transmitting/receiving operation control means is provided, and the transmitting/receiving operation controlling means stops the radio wave transmitting/receiving operation of the connected device and shifts to a standby charging state when the identification information matching means determines that the identification information of both devices match. At the same time, if there is a mismatch, the connection device continues to transmit and receive radio waves.

(Function) As a result, even if you accidentally connect another wireless telephone to the connected device during a call, if the connected device and wireless telephone do not correspond, the transmitting/receiving operation of the connected device will be stopped. This makes it possible to continue as is without having to do so. Therefore, the problem that a third party's call is unexpectedly disconnected can be eliminated, thereby reducing the inconvenience caused to the subscriber.

(Embodiment) FIG. 1 shows the configuration of a wireless telephone device in an embodiment of the present invention. In this figure, the same parts as in FIG. 2 are given the same reference numerals and detailed explanations will be omitted.

The radio telephone 4' is provided with a voltage drop detection circuit for detecting a voltage drop between charging terminals 55 and an identification information sending circuit. The voltage drop detection circuit is composed of five resistors connected between the charging terminals 55, a comparator 60, and a prefectural quasi-power supply (output voltage VB), and connects the wireless telephone 4' to the connecting device 2.
The comparator 60 detects the voltage drop across the charging terminals 55 that occurs when the charging terminal 55 is placed on the battery, and notifies the control circuit 52' of the detection result. The identification information sending circuit is
Consists of an amplifier 57 and a coupling capacitor 58,
When a voltage drop is detected by the voltage drop detection circuit, the relay identification information (ID code) generated from the control circuit 52' is amplified by the amplifier 57 and then transmitted via the coupling capacitor 58 and the charging terminal 55.33. -11= is sent to the connecting device 2'. Note that the ID code is predetermined to be different for each radio telephone device.

On the other hand, the connecting device 2' is newly provided with an identification information receiving circuit. This identification information receiving circuit is composed of a coupling capacitor 36, an amplifier 37, and a waveform shaping circuit 38, and when the wireless telephone 4' is placed on the connecting device 2', It receives the ID code sent from the wireless telephone 4' and notifies the control circuit 31' of this ID code. Also, this control circuit 3
1' is equipped with identification information verification means and transmission/reception operation control means in addition to various connection control means as its control means. Among these, the identification information verification means is the comparator 3.
5, when a voltage drop is detected, the ID code received by the identification information receiving circuit is compared with its own ID code. Further, the transmission/reception operation control means stops the transmission/reception operation and returns to a standby state when the ID code sent from the wireless telephone 4' and its own ID code are determined to match by the identification information verification means; If the above-mentioned ID codes do not match, it is determined that another wireless telephone has been placed, and the transmitting/receiving operation in progress is continued.

With such a configuration, if the subscriber who has just ended the call connects the wireless telephone 4'a to the paired connection device 2.
If the wireless telephone 4'a is placed on a connecting device 2'b other than 2'a, the charging terminal 55 of the wireless telephone 4'a will contact the charging terminal 33 of the connecting device 2'b, and thereafter the wireless telephone 4'a will be connected to the wireless telephone 4'a by the connecting device 2'b. Charging of the battery 54 is started.

Now, when this charging is started, the voltage across the charging terminal 55 of the wireless telephone 4' drops, and this voltage drop is detected by the comparator 60 and notified to the control circuit 52'. Then, the control circuit 52' outputs a predetermined ID code of the device itself, and this ID code is sent from the identification information sending circuit to the connecting device 2'b via the charging path.

On the other hand, when the connecting device 2'b detects by the comparator 35 that the wireless telephone has been placed, the connecting device 2'b monitors the arrival of the ID code by using the identification information receiving circuit. and,
When the ID code is received in this state, the control circuit 31'
This received ID code can be used as your own predetermined ID.
The ID code is checked to determine whether or not both ID codes match. By the way, since the wireless telephone 4'a is currently placed in another connecting device 2'b, the above ID codes do not match. For this reason, the control circuit 31' of the connecting device 2'b
determines from this verification result that a different radio telephone 47a has been placed, and if the own device is in the process of transmitting/receiving, it continues the transmitting/receiving operation. Then, the radio telephone 4' a is activated by emitting an alarm sound using a sounder (not shown) or by flashing a display.
Notify the subscriber that he/she has placed it by mistake.

Note that when the wireless telephone 47a is placed in the connecting device 2'a that is paired with this wireless telephone 4'a, the wireless telephone 47a
Since the ID code sent from 'a' and the ID code of connecting device 2'a match, connecting device 2'a/
The control circuit 31' of the wireless telephone 4La determines that the wireless telephone 4La is placed correctly, and if it is currently in the process of transmitting and receiving, it stops the transmitting and receiving operation and returns to the standby state. Therefore, even if the subscriber places the wireless telephone on the connecting device without turning off the call switch 48 at the end of the call,
The transmission and reception operations of the connecting device 2'a are automatically stopped,
This reliably prevents the transmission of unnecessary radio waves.

As described above, in this embodiment, when the wireless telephone 4' is placed on the connecting device 2', the wireless telephone 4' is connected to the connecting device 2'.
The connecting device 2' checks this ID code with its own, and if the two codes do not match, the connecting device continues to operate as it is, so the wireless telephone 4' Not only can unnecessary radio waves be prevented from being sent out due to forgetting to turn off the transmission switch 48, but even if the wireless telephone is mistakenly placed on another connected device during a call, the transmission/reception operation of this connected device can continue as it is without stopping. be able to. Therefore, there is no problem that the call is suddenly interrupted, thereby reducing the inconvenience caused to the subscriber.

Note that the present invention is not limited to the above embodiments. For example, in the case of a device that confirms the other party by sending and receiving an ID code when connecting to a wireless line when making and receiving calls, this ID code can be used to confirm the identity of the other party when the wireless telephone is placed on the connecting device. May be used for personal purposes. Further, in the above embodiment, the ID code is sent from the wireless telephone to the connecting device and verified by the connecting device, but the ID code may be sent from the connecting device to the wireless telephone and verified by the wireless telephone. . In addition, various modifications may be made to the configuration of the identification information, the configuration of the identification information transmitting/receiving means, the control procedure and control content of the transmitting/receiving operation control means, the type of alarm, the configuration for issuing the alarm, etc. without departing from the gist of the present invention. It can be implemented by

[Effects of the Invention] As described in detail above, according to the present invention, at least one of the connecting device or the wireless telephone has a predetermined function between the wireless telephone and the connecting device when set in the wireless telephone or the connecting device. An identification information transfer means for sending and receiving unique identification information, an identification information matching means for comparing the identification information with one's own identification information when the identification information is sent, and a transmission/reception operation control means are provided, and the transmission/reception operation control means is provided. When the identification information matching means determines that the identification information of both devices match, the means stops the transmission and reception of radio waves of the connected device and shifts to a standby charging state, and if there is a mismatch, the radio wave of the connected device is stopped. By continuing the sending and receiving operations of the wireless telephone, even if another wireless telephone is mistakenly placed on another connected device, the call will not be stopped immediately, thereby reducing the inconvenience to other subscribers. It is possible to provide a wireless telephone device that can be reduced in size.

[Brief explanation of the drawing]

FIG. 1 is a circuit block diagram showing the configuration of a radio telephone device according to an embodiment of the present invention, and FIG. 2 is a circuit block diagram showing the structure of a conventional radio telephone device. DESCRIPTION OF SYMBOLS 1...Subscriber line, 2'...Connection device, 3...Radio line, 4'-Radio telephone, 2.1.41...Synthesizer, 22.42...Transmitter, 23.43- ...Receiver, 24...Line relay, 25...Hybrid circuit, 26.47...Transmission antenna, 27.44...
Receiving antenna, 28... Incoming call detection circuit, 31'...
Control circuit for connection device, 32... Rectification stabilization circuit, 33
゜55...Charging terminal, 34...Charging resistance, 35゜6
0... Comparator of voltage drop detection circuit, 36°58
...Coupling capacitor, 37.57...Amplifier, 38...Waveform shaping circuit, 45...Telephone receiver, 46
...Telephone, 48...Call switch, Tsuchi, 49...
Dial key, 52'... control circuit of radio telephone, 5
3... Sounder, 54... Battery, 56... Backflow prevention diode. Applicant's agent Patent attorney Takehiko Suzue

Claims (2)

[Claims] (1) Consisting of a connection device connected to a wired line and a wireless telephone connected to this connection device via a wireless line, when the wireless telephone is set in the connection device in a predetermined state, the battery of the wireless telephone In a wireless telephone device that is charged by the power supply of the connecting device, at least one of the connecting device or the wireless telephone has unique identification information predetermined between the wireless telephone and the connecting device when the wireless telephone is set in the connecting device. an identification information transfer means that sends and receives the identification information; an identification information verification means that compares the identification information with its own identification information when the identification information is sent; and an identification information verification means that determines that the two identification information match. The device is characterized by comprising a transmitting/receiving operation control means that stops the radio wave transmitting/receiving operation of the connecting device and transitions to a standby charging state when the connection device matches, and continues the radio wave transmitting/receiving operation of the connecting device when there is a mismatch. wireless telephone equipment. (2) The transmitting/receiving operation control means causes the connecting device to continue transmitting and receiving radio waves and issues an alarm when the identification information exchanged between the connecting device and the wireless telephone matches. A wireless telephone device according to claim (1).