JPS63184419A - Radiotelephony equipment - Google Patents

Abstract

PURPOSE:To prolong the service life of battery and the miniaturization of a radio telephone equipment by allowing a master set to detect the state of a wired line in case of on-hook call and informing it to a radio telephone set and using a ring tone generating means by the radio telephone set to report it. CONSTITUTION:When an on-hook call comes by an on-hook call input means A from a radio telephone set, a master set uses a state discrimination means B to detect the state of the wire circuit side by the signal incoming from an exchange after the call. Thus, the master set informs the result of detection by the means B from the state transfer means C via the radio line to the radio telephone set. The radio telephone set uses the state informing control means D to use an existing ring tone generating means for incoming report for the report of the sent state of the wired line side distinguishingly. Thus, it is not required to provide a large sized speaker for wired line monitor and its drive circuit to the radio telephone set and on-hook calling is applied without incurring large sized radio telephone set and the short service life of the battery.

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. 7 shows its configuration, and this device is composed of a parent device 2 connected to the subscriber line 1 and a wireless telephone 4 connected to the parent device 2 via a wireless line 3. The device is equipped with a transmitter (TX) 22 and a receiver (RX) 23 in which a transmission/reception channel is specified, and a line relay 24 and a hybrid circuit 25 transmit the call signal received from the other party's terminal via the subscriber line 1 during a call. After that, the signal is modulated by the transmitter 22 and sent from the transmitting antenna 26 to the wireless line 3, and the wireless communication signal that arrives from the wireless telephone 14 via the wireless line 3 is demodulated by the receiver 23 via the receiving antenna 27. It is then sent to the subscriber 1i11 via the hybrid circuit 25 and line relay 24.

This parent device 2 also serves as a circuit necessary for connection between the subscriber line 1 and the wireless telephone 4, and is connected to the 16H signal received from the exchange.
An incoming call detection circuit 28, a received electric field detection circuit (C-DET) 29, and an identification signal detection circuit (I
D-DET) 30 and a control circuit (CONT) 31. Of these, the communications electric field detection circuit 29 is comprised of a carrier squelch or noise squelch circuit, and monitors the arrival of radio waves from the wireless telephone 14. The identification signal detection circuit 30 verifies a predetermined identification signal (ID code) based on the combination of the parent device 2 and the wireless telephone 4, and notifies the control circuit 31 of the verification result. Control circuit 3
Reference numeral 1 has a microcomputer as a main control section, for example, and performs various connection controls. In addition, 32 is a rectification stabilization circuit, which outputs a predetermined operating voltage Vcc from the commercial power supply output.
This operating voltage Vcc is supplied to each circuit in the parent device 2, and is also supplied to the wireless telephone 4 via the power supply terminal 33.
It is supplied as a charging voltage to the

On the other hand, the radio telephone 4 is equipped with a transmitter (TX) 42 and a receiver (RX) 43 whose transmission and reception channels are designated by a synthesizer (SYN) 41, similar to the above-mentioned parent device 2. 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 the communication signal input from the transmitter 46 is modulated by the transmitting fj 442, and then the transmitting antenna 47 is output. The data is transmitted to the wireless line 3 via the radio line 3.

Further, this wireless telephone 114 includes a transmission switch 48, a circuit necessary for connection between the rice bag @2 and the exchange
Dial key 49, received electric field detection circuit (C-DET) 5
0, an identification signal detection circuit (ID-DET) 51, a control circuit (CONT) 52 whose main controller is a microcomputer and performs various connection controls, and a sounder 53 which generates a sound. Note that 54 is a battery, which is supplied with power from the parent device 2 via a charging terminal 55 and charged by the operating voltage Vcc.

In such a configuration, when an incoming call first occurs, the parent 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, so that the transmitter 22 and receiver 2 are operated to send an ID code and an incoming call signal to wireless telephone 4.

On the other hand, in the radio telephone 4, the receiver 43 performs an intermittent reception operation while on standby, and when a radio wave arrives from the master device 2 in this state, it is detected by the received electric field detection circuit 50, and the identification signal detection circuit In step 51, the ID code sent from the parent device 2 is verified. If it is determined as a result of this verification that the call has arrived at the own device, the control circuit 52 instructs the synthesizer 41 to select a transmission/reception channel, puts the transmitter 42 and the receiver I 1543 in a continuous operating state, and sends the incoming response signal to the parent device. 2, and the sounder 53 generates a ringing tone to notify the subscriber of the occurrence of the incoming call.

When the subscriber responds to this call by turning on the calling switch 48, the radio telephone 4 sends a message t to that effect.
a42 to the parent device 2, and as a result, the parent device 2 turns on the line relay 24.

Thus, the wireless telephone 4 and the caller are connected, 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 the ID code and transmission signal are sent to the parent device 2. On the other hand, when a radio wave arrives from the wireless telephone 4, the parent device 2 receives it from a receiving electric field detection circuit 29.
The ID code is detected by the identification signal detection circuit 30. As a result of this verification, when it recognizes that it is a connection request to itself and confirms the arrival of the outgoing signal, the control circuit 31 creates an outgoing response signal and sends this signal along with the instruction information of the sending/receiving channel from +122 wirelessly. The information is sent back to the telephone set 4, thereby causing the radio telephone set 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. Furthermore, when the subscriber inputs the telephone number of the other party using the dial key 49 in this state, the wireless telephone 4 transmits the key code data from the transmitter 42 to the master device 2 via the wireless line 3. As a result, the control circuit 31 of the parent device 2
controls the opening/closing of the line relay 24 in accordance with the key code data to transmit dial pulses to the subscriber line 1.

A call is then made to the desired calling party, and if the called party responds, the wireless telephone t14 and the called party are subsequently connected and a conversation is 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, it has been considered to provide this type of device with a so-called on-hook calling function, which allows the user to make a call without bringing the handset of the wireless telephone 4 close to the subscriber's face. However, in order to make on-hook calls, a relatively large speaker (
(about 5 crrt in diameter) and its drive circuit.

However, the wireless telephone 4 is desired to be small and lightweight so that it can be easily carried, and since it is powered by a battery, it is necessary to reduce current consumption as much as possible. For this reason, it has been extremely difficult to provide the wireless telephone device with the above-mentioned on-hook calling function.

(Problems to be Solved by the Invention) As described above, it is difficult for conventional devices to have an on-hook calling function, and if they are attempted to do so, the problem is that the size of the wireless telephone and the shortened battery life are unavoidable. The present invention has focused on this point and aims to provide a radio telephone device that can realize on-knock calling without increasing the size of the radio telephone or shortening the battery life.

[Configuration of the Invention (Means for Solving Problems)] As shown in FIG. 1, the present invention comprises: input means A for instructing on-hook transmission; state detection means B for detecting the state of the wired line; A state transmitting means C and a state notification control means are provided, and when an on-hook call is instructed by the input means A, the state detecting means B detects the state of the wired line from a signal arriving from the exchange after the call is made. At the same time, the detection result of the state detecting means B is transmitted to the state transmitting means C.
The transmitted state on the wired line side is transmitted from the parent device to the wireless telephone via the wireless line, and the state notification control means distinguishes the state from each other using at least the ringing means for incoming call notification. It was designed so that

(Function) As a result, when an on-hook call is made, the status of the wired line is detected by the parent device, this detection result is transmitted to the wireless telephone, and the wireless telephone generates the existing ringing tone for incoming call notification. Since the state of the wired line side is notified using the means, there is no need to provide the wireless telephone with a large speaker for monitoring the wired line and its driving circuit.
This allows the radio telephone to be made smaller and the battery life to be extended.

(Embodiment) FIG. 2 shows the configuration of a wireless telephone device in an embodiment of the present invention. In this figure, the same parts as in FIG. 7 are given the same reference numerals and detailed explanations will be omitted.

The parent device 20 is newly equipped with a ring detection circuit (RBTDET).
) 34 and a busy tone detection circuit (BTDET) 35 are provided. Among these, the ringing tone detection circuit 34 detects the presence or absence of a ringing tone (ringback tone) arriving from the exchange via the subscriber line 1 after sending out a dial signal, and is configured as shown in FIG. 3, for example. That is, the incoming ringback tone is first input to the bandpass filter 341, where it filters out the main component of the ringback tone (400).
1z and sends this passed signal to the amplification circuit 342.
After amplifying to the level required for rectification, the rectifier circuit 343
rectify with. The level of this rectified output is determined by a determination circuit 344 to determine the presence or absence of a ringback tone, and this determination output is delayed by a predetermined time in a delay circuit 345 and output to the control circuit 310 as a detection output.

Here, the delay time of the delay circuit 345 is set to 2 seconds or more in order to prevent the detection output from being interrupted during this period of interruption, since the ringback tone is a repetitive signal that is sent out for 1 second and then interrupted for 2 seconds. be done.

Further, the busy tone detection circuit 35 detects the presence or absence of a busy tone from the exchange after sending the dial signal.

On the other hand, the wireless telephone elI40 is newly provided with an on-hook transmission switch 56. This switch consists of a locking push button switch, and supplies its on/off information to the control circuit 520.

By the way, the control circuits 310 and 520 of the parent device 20 and the wireless telephone 40 each include a state determination control means, a state transmission control means, and a state notification control means as control means related to on-hook transmission. First, the state determination control means detects the ringing tone detection circuit 34 after sending out the dial signal.
From the detection output of the busy tone detection circuit 35, it is possible to recognize whether or not the other party's terminal is being called and whether the other party's terminal has responded. recognize. Further, the state transmission control means notifies the radio telephone 40 via the radio line 3 of the state of the partner terminal recognized by the state determination control means. Further, the status notification control means allows the subscriber to distinguish the status of the other party's terminal notified from the parent device 20 via the wireless line 3 by generating different sounds from a sounder 53 provided for incoming call notification. This will be announced separately.

Next, the control circuit 3 controls the operation of the device configured as described above.
This will be explained according to the control procedure of No. 10,520. In the standby state, the control circuit 310 of the parent device 20 monitors the arrival of an incoming signal from the subscriber line 1 and controls the radio telephone 4 in steps 4a and 4b, respectively, as shown in FIG. 4(a).
At the same time, the reception of the on-hook transmission signal is monitored in step 4C. On the other hand, the control circuit 520 of the wireless telephone 140 is configured as shown in FIG.
As shown in a), in steps 5a and 5b, the reception of an incoming signal and the operation of the outgoing call switch 48 are monitored, respectively, and the operation of the on-hook outgoing switch 56 is monitored in step 5C.

Now, when the subscriber turns on the on-hook transmission switch 56 of the wireless telephone 40 in this state, the υilD circuit 520 of the wireless telephone 40 connects the wireless line with the parent device 20, and then sends an on-hook transmission signal in step 5d. It is sent to the parent device 20. The subscriber then dials the dial key 49.
When the user inputs the other party's telephone number by operating , the dial code is sent to the parent device 20. On the other hand, when the control circuit 310 of the parent device 20 detects reception of an on-hook transmission signal from the wireless telephone 1140 in step 4C, it first turns on the line relay 24 in step 4d and monitors the arrival of a dial code in step 4e. .

When a dial code arrives from the wireless telephone 40, it is confirmed in step 4f that a predetermined time t1 has elapsed since the line relay 24 was turned on. Send a dial pulse to line 1. When the dial pulse transmission is finished, the control circuit 310 performs step 4.
h and step 41, the busy tone B is detected from the detection outputs of the busy tone detection circuit 35 and the ringing tone detection circuit 34, respectively.
The arrival of T and ringback tone RBT is monitored. In this state, if the other terminal is in a standby state and a ringback tone arrives from the exchange, the control circuit 310 generates an RBTBT signal indicating the ringback tone in step 4j, and connects this RBTBT signal line 3. is sent to the wireless telephone 40 via the . Then, in step 4, as shown in FIG. 4(b), the stoppage of the ringback tone is monitored based on the detection output of the ringtone detection circuit 34, and in this state, the subscriber at the other end responds and the exchange When the sending of the ringback tone is stopped, the control circuit 310 stops sending the RBTBT signal to the wireless telephone 40 in step 4λ. Then, in step 4m, reception of an off-hook signal from the wireless telephone 40 is monitored, and if an off-hook signal is received, the process moves to call processing.

On the other hand, when the control circuit 520 of the wireless telephone 40 finishes sending out the dial code, the control circuit 520 performs steps 5f and 5Q.
BT signal and RBTBT from the parent device 20, respectively.
Signal monitoring is being carried out, and if an RBTBT signal is received from the new H20 in this state, the process moves to step 5h, where a ringing signal (RBT ringing signal) indicating that a call is in progress is generated, and this signal is sent to the sounder. 53, thereby causing the sounder 53 to generate the RB T Ill sound.

Here, as this RBT sound, for example, a sound resembling a ringback tone, which is emitted for 1 second and interrupted for 2 seconds, is used.

Therefore, by hearing this RBT ringing tone, the subscriber can recognize that the other party is currently being called. While the RBT ringing is occurring, the control circuit 520 monitors the end of the RBTBT signal sent from the new @20 in step 51, and when the RBT signal ends in this state, it determines that the called party has answered in step 5j. and supplies a sound signal (response sound signal) indicating this to the sounder 53,
This causes the sounder 53 to generate a response sound.

As this response sound, a sound different from the above-mentioned RBT sound is used, such as a sound that intermittents at 0.1 second intervals, for example. Then, while this response tone is being generated, the control circuit 520 monitors the subscriber's off-hook operation in step 5, and if the subscriber confirms the response tone and performs an off-hook operation in this state, this is detected as described above. It is recognized in step 5, and the process moves to step 5λ, where an off-hook signal is sent to the parent device 20, and thereafter, the process moves to call processing. Thus, a call is made by on-hook origination.

On the other hand, the other party's terminal is busy and the exchange receives a busy tone B.
If T has arrived, the control circuit 310 of the parent device 120 detects the arrival of this busy tone in step 4h, moves to step 4n, and sends a signal (BT signal) indicating that the other party's terminal is busy. is generated and sent to the wireless line 3. On the other hand, when the control circuit 520 of the radio telephone 40 detects the reception of the BT signal in step 5f,
), move to step 5m, where the opponent 17
A ringing signal indicating that one terminal is busy (BT ringing signal)
is generated and supplied to the sounder 53, thereby causing the sounder 53 to generate a BT sound. As this BT ringing, for example, a signal resembling a busy tone, which is sent out for 0.5 seconds and repeated at 0.5 odd points, is used, so that the subscriber can clearly know that the other party's terminal is busy. and,
When the subscriber turns off the -H on-hook call switch 56 in order to make a call again, the control circuit 520 detects this in step 5n and proceeds to step 50, where it sends a switch-off signal to the parent device 20. It will then return to standby mode. On the other hand, after transmitting the BT signal, the control circuit 310 of the parent device 200 monitors the reception of the call completion signal from the wireless telephone 1I40 in step 40, and if it detects the reception of the call completion signal in this state, the control circuit 310 moves to step 4p. The line relay 24 is turned off, and the system then returns to the standby state.

In this embodiment, in the on-hook call mode, the parent device 20 monitors the arrival of a ringback tone or busy tone from the exchange after sending out a dial pulse, and determines the state of the other party's terminal from the monitoring result, that is, whether it is calling. It determines whether the telephone is currently in use or busy, and whether there is a response if the call is in progress, and transmits this determination result to the wireless telephone 40, which then outputs a ringing sound with a different form for each of the above-mentioned states. Since the sound is generated from the sounder 53, the subscriber can clearly know the status of the other party's terminal by listening to the sound generated from the sounder 53, and thereby the on-hook call can be made reliably. In addition, since the status of the other party's terminal is notified using the sounder 53 already installed for incoming call notification, the wireless telephone can be made smaller compared to the case where a speaker is installed to directly monitor the signal on the subscriber line. Moreover, since the current consumption can be significantly reduced, the life of the battery can be extended. By the way, the speaker for line monitor has a diameter of 5cm.
The drive current is usually 100 mA or more, whereas the sounder 53 has a diameter of about 1 cttt and a drive current of 10 to 20 mA, so it is small and has low current consumption.

Note that the present invention is not limited to the above embodiments. For example, as shown in FIG.
6 may be provided, and the voice detection circuit 36 may detect the response of the other party.

In this way, the true response of the other party's terminal can be detected in a relatively short time. By the way, when detecting the response of the other terminal from the stoppage of the ringback tone as in the above embodiment, the detection output is set for more than 2 seconds to prevent the detection output from turning off during the 2-second interruption of the ringback tone. Since the delay circuit 345 having a delay time is provided, the timing of detecting the response of the partner terminal is delayed by at least 2 seconds. Furthermore, the parent device 200 is provided with a message sending circuit 37 consisting of, for example, a voice synthesis circuit or a tone generation circuit, so that the subscriber can use the wireless telephone 400 after the other party's terminal responds.
This message sending circuit 3
A hold message or a corresponding tone signal may be generated from 7 and sent to the other party's terminal. In this way, there is no need to worry about making the other subscriber feel strange, and it is possible to reliably prevent problems such as the other subscriber erroneously disconnecting the line. Further, in the embodiment described above, only the state of the other party's terminal after sending the dial signal is detected, and the result is transmitted to the wireless telephone and notified by the sounder 53. In addition, the line relay 2
After turning on the switch 4, the exchange may detect that a dial tone is available from the exchange based on the presence or absence of a dial tone, and may transmit this status to the radio telephone and notify it from the sounder. Further, when the wireless telephone 400 is provided with a display 57 such as a liquid crystal display or a light emitting diode as shown in FIG. The notification may be made by displaying a message or blinking the message. Other features include the generation of sounds to distinguish and notify the status of the other party's terminal and exchange, the configuration of the on-hook manual transmission means, the configuration of the status determination unit that determines the status of the subscriber line, and the control procedure control of each control circuit. Regarding the content, etc., the present invention can be implemented with various modifications without departing from the gist of the present invention.

[Effects of the Invention] As described in detail above, according to the present invention, an input means for instructing on-hook transmission, a state detection means for detecting the state of the wired line, a state transmission means, and a state notification control means are provided. is provided, and when an on-hook call is instructed by the input means, the state detecting means detects the state of the wired line from a signal arriving from the exchange after the call is made, and the detection result of the state detecting means is transmitted to the state transmitting means. transmits the transmitted state on the wired line side from the parent device to the wireless telephone via the wireless line, and causes the status notification control means to notify each other in a distinguishable manner using at least a ringing means for incoming call notification. By doing so, it is possible to provide a radio telephone device that can perform on-hook calls without increasing the size of the radio telephone or shortening the battery life.

[Brief explanation of the drawing]

FIG. 1 is a functional block diagram showing the configuration of a wireless telephone device according to the present invention, and FIGS. 2 to 5 are for explaining the wireless telephone device according to an embodiment of the present invention. 3 is a circuit block diagram showing the configuration of the ring detection circuit, FIGS. 4 and 5 are flowcharts showing the control procedure and control contents of the control circuit, respectively, and FIG. FIG. 7 is a circuit block diagram of a radio telephone device used in the detailed explanation of the invention. FIG. 7 is a circuit block diagram showing the configuration of a conventional radio telephone device. A: On-hook transmission manual means, B: status determining means, C: status transmitting means, D: status notification control means, 1: subscriber line, 3: radio line, 20 .200
... Parent device, 21.41 ... 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, 29.50... Reception electric field detection circuit, 30.51... Identification signal detection circuit, 31
0,520°311.521...Control circuit, 32...
- Rectification stabilization circuit, 33... Power supply terminal, 34... Ringing detection circuit, 341... Band pass filter, 34
2... Amplifier circuit, 343... Rectifier circuit, 344...
・Level judgment circuit, 345...Delay circuit, 35...
Busy sound detection circuit, 36...Voice detection circuit, 37...
Message sending circuit, 40.400...wireless telephone,
48...Call switch, 49...Dial key, 5
6... On-hook transmission switch, 57... Display device. Applicant's agent Patent attorney Takehiko Suzue Main device wireless telephone

Claims (6)

[Claims] (1) A wireless telephone device comprising a parent device connected to a wired line, and a wireless telephone connected to the parent device via a wireless line, operating with a battery as a power source, and equipped with a ringing means, an input means for instructing an on-hook call; a state detection means for detecting the state of the wired line from a signal arriving from an exchange connected to the wired line after the call is made when the input means instructs the on-hook call; and the state of the wired line. a state transmitting means for transmitting the state of the wired line side detected by the detection means to the wireless telephone via a wireless line; and a state transmitting means for transmitting the state of the wired line side transmitted by the state transmitting means to at least the sound generating means. What is claimed is: 1. A wireless telephone device comprising: a status notification control means for discriminating notifications from each other. (2) The wireless telephone device according to claim (1), wherein the state detection means detects at least a state in which the other party is calling and a state in which the other party terminal has responded, as the state on the wired line side. . (3) The state detection means detects at least a state in which the other party is calling, a state in which the other party has responded, and a busy state as the states on the wired line side. Radiotelephone device as described in Section 1. (4) The status determining means detects, as the status of the wired line, a state in which the exchange is ready to accept a selection signal, a state in which the other party's terminal is being called, a state in which the other party's terminal has responded, and a busy state. A wireless telephone device according to claim (1). (5) The status notification control means notifies the status of the wired line side by generating a sound from the sound generation means and visually displaying it on the display. Radio telephone equipment. (6) The wireless communication system according to claim (1), wherein the state detection means transmits an audible sound to the other party from the time when the other party responds to when the radio telephone performs a call initiation operation. Telephone device.