JPH01218249A - Radio telephone set - Google Patents

Abstract

PURPOSE:To prevent an opposite side from being made into a soundless condition for a long time and to announce the deterioration of a reception electric field level to the user of a radio telephone set by providing a means to send a signal sound to a telephone line and to the radio telephone set. CONSTITUTION:A master set 1 checks the output of a reception electric field detecting circuit 10, and when the electric field level decreases, the circuit 10 turns off the output of a receiver 18. Further, the deterioration continues for three seconds, the equipment 1 controls a hybrid circuit 4, sends the output of an announcing sound circuit 32 to a wire telephone circuit 3, controls a transmitter 5, and switches the input of the transmitter 5 from the hybrid circuit output to the output of an alarm sound circuit 31. From this, since an announcing sound is generated from a receiver 15 of a wireless telephone set 2, the user of the wireless telephone set 2 can know the deterioration of the reception electric field level. Further, the opposite side can be prevented from being made into the soundless condition.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) This invention relates to a master device connected to a wired telephone line, and a master device connected to a wired telephone line;
! Regarding wireless telephones that have a wireless telephone connected via a wireless line to the @ location, in particular, when the received electric field level of the wireless line decreases, a signal tone indicating this is sent to the wired telephone line. The present invention relates to a wireless telephone device that notifies the other party of the call.

(Conventional technology) Conventionally, this type of device has been constructed as shown in FIG.

That is, the parent device e21 is connected to the wireless 1a telephone 2 via a wireless line, and is also connected to the wired telephone line 3. A brief explanation of this operation is as follows.

Wired telephone port #! The signal sent from 3 passes through the hybrid circuit 4 and becomes a modulation input of the transmitter Ia5.

The radio waves modulated by the transmitter 5 are transmitted from the transmitting antenna 6!
It is sent to telephone 2. On the other hand, the radio waves transmitted from the wireless telephone 2 are received by the receiving antenna 7 and demodulated by the receiver 118. The demodulated signal is sent to the right telephone line a #j13 via the hybrid circuit 4.

Synthesizer 9 outputs a frequency corresponding to the wireless channel to transmitter 5 and receiver 8.

One of the outputs of the receiver IIa8 is input to the received electric field detection circuit 10, and the electric field strength is determined. This circuit is generally called a carrier squelch circuit or a noise squelch circuit. Another output is output as a data signal included in the received demodulated wave, and is sent to the parent device! ! The identification signal is input to an identification signal detection circuit 11 which compares an identification signal determined by the combination of the wireless telephone 1 and the wireless telephone 2. This identification signal is generally called an ID code.

The outputs of these detection circuits 10 and 11 and the I-key output of the data signal are input to the control circuit 12 and used for connection control. Furthermore, the control circuit 12 performs wireless channel FIJm by controlling the synthesizer 9 1M,
Control is performed such as sending out the transmission data signal as a modulation input.

On the other hand, the receiving antenna 13,
There is a receiver 1114, and the demodulated output is output to the receiver 15. Furthermore, the voice input from the transmitter tli 16 becomes the modulated input of the transmitter 17, and is sent out as a radio wave from the transmitter antenna 18.

The synthesizer 19, received electric field detection circuit 20, and identification signal detection circuit 21 are equivalent to the 11 device 1, and the control circuit 22 controls the II-less telephone 1N2. The speaker 23 is a sounder that emits a ringing tone when a call arrives.

In these power supply systems, the power source e1 connects the AC plug 24 to ACl 00V, and uses the output of the rectification stabilization circuit 25. In addition, this output is connected to the current limiting resistor 26 and the charging terminal 2.
7. Rechargeable battery for wireless telephone 1m2 via 28
The output of the battery 29 is used as a power source for the wireless telephone 112.

To make a call from this wireless telephone device, use RIll Telephone $1.
2 (for example, a call key not shown) is pressed. The radio telephone i12 sets the synthesizer 19 to the control channel, and if the control channel is unused, turns on the transmitter 17 and transmits a calling signal including the ID code. 1IIWAW11 receives this calling signal and
When it is determined that the D codes match, the transmitter 5 is turned on, and a call response signal containing the channel code and ID code of the communication channel, which has been previously confirmed to be unused, is transmitted on the control channel, and the Switch the synthesizer 9 to When the wireless telephone 112 receives a call response signal with a matching 10 code, it turns off the transmitter 17, switches the synthesizer 9 to the communication channel according to the channel code included in the received call response signal, and then If the communication channel is unused, the transmitter 17 is turned on again and a channel switching completion signal is transmitted.

Upon receiving the channel switching completion signal, the carrier e1 transmits an AFON signal indicating the start of a call, and controls the hybrid circuit 4 to connect to the wired line. No I
When the telephone 2 receives the AFON signal, the transmitter 1
6. Operate the receiver 15 to start a conversation.

In the call operation, the parent vtH1 performs the operation shown in the flowchart shown in FIG. Received electric field detection circuit 10
When detecting a decrease in the electric field (step 101), the output of the receiver 8 is turned off to prevent radio noise from appearing on the wired line (step 102). This allows the wired telephone port [1
3, the wireless telephone 2 enters a silent state in which no input voice is output from the transmitter 16. Furthermore, the received @ electric field continues to decrease and 3
After 0 seconds (step 104) Teru I! A forced call termination signal is sent to the telephone 12 (step 105), and the system returns to the standby state.

This will disconnect you from the wired line. As a result, the other party receives a busy tone from the exchange.

In the wireless 11aTi talk 112, upon receiving a forced call termination signal (step 201), the wireless line is immediately disconnected and the device returns to the standby state.

If the wireless telephone 1N2 does not receive the forced call termination signal in step 201, it determines whether there is a dial operation using the key unit 30 (step 202), and if there is a dial operation, it transmits a dial signal (step 203).
). If it is determined in step 204 that the call has ended, a call end signal is transmitted (step 205), and the device enters a standby state. If the call is not determined to be over in step 204, step 2 is performed again.
The process returns to 01 and determines whether a forced call termination signal has been received.

Furthermore, if the received electric field does not decrease, or if the received electric field decreases but recovers within 30 seconds, the master device 1 determines whether a dial signal has been received (step 106). If a dial signal is received here, a dial signal is sent to the wired telephone port a3 (step 107). As a result, when the other party answers, a call can be made via the wired telephone line. In step 108, it is determined whether a call-end signal has been received, and when the call-end signal is received, the device enters a standby state. Further, if the end-of-call signal is not received, the process returns to step 101 and it is again determined whether the received electric field has decreased. Note that after turning off the receiver output in step 102, the process returns to step 101 again, and if no decrease in the received electric field is detected here, the receiver is turned on again (step 103).

(Problem to be Solved by the Invention) In this way, in the conventional device, if the voice from the wireless telephone 2 does not come out to the wired telephone line 3 or continues for a long time, the person on the other end of the conversation cannot hear the state of the wireless telephone 8. I was worried because I didn't know what to do, and after that, both parties suddenly had a forcible disconnection, which could have been a problem with the phone being broken.

Therefore, the present invention eliminates this problem, eliminates the need for long periods of silence, and furthermore provides a wireless telephone that is capable of notifying at least the user of the wireless telephone that the received electric field level is decreasing. The purpose is to provide eight telephone stations.

[Structure of the invention]

(Means for Solving the Problems) According to the present invention, the parent device includes a parent device connected to a wired IWI telephone line and a wireless telephone connected to the parent device via a wireless line, includes received electric field level detection means for detecting a decrease in the received electric field level of the wireless line, and in response to the detection output of the received electric field level detection means, the wireless! In the radio telephone VtW1, the wireless telephone VtW1 is provided with a means for cutting off received audio from the telephone, and the operation is started in response to the detection output of the received electric field level detection means, and the detected output of the received electric field level does not occur even after a certain period of time has elapsed. The apparatus includes timer means for outputting a signal if the timer remains unchanged, and means for transmitting a signal tone to the wired telephone line in response to the output of the timer means.

Further, according to the present invention, the apparatus further includes means for transmitting a signal tone to the radio telephone in response to the output of the timer means.

(Function) In the present invention, when the received electric field level continues to decrease for a certain period of time or more, a signal is output from the timer means, and this signal causes a signal tone to be sent to the wired telephone line.

This prevents the person on the other end of the conversation from being silent for long periods of time. In addition, if a wireless telephone is configured to notify a drop in the received electric field by a signal tone, for example, even if the line is forcibly disconnected, the reason will be known, and the signal tone will alert the user to the problem. ! The telephone is moved to a location where the reception field is sufficient to continue the call.

(Example) Fig. 1 shows the no-telephone Vtl1 of this invention! This figure shows an example of the above. Note that in FIG. 1, parts that perform the same functions as those shown in FIG. 3 are designated by the same reference numerals as in FIG. 3, and explanations thereof will be omitted.

The embodiment shown in FIG. 1 is constructed by adding an alarm sound circuit 31 and a notification sound circuit 32 to the circuit shown in FIG. The operation of this embodiment will be explained below with reference to the flowchart shown in FIG.

Parent @II! Step 1: Check the output of the received electric field detection circuit 10. Step 101) When the ffi field decreases, the reception 111
8 (step 102). When the FFI field continues to decrease for another 3 seconds (step 111), the hybrid circuit 4 is controlled and the output of the notification sound circuit 32 is sent to the wired telephone line 3. 112), further send 115
control, the input of the transmitter 5 is switched from the hybrid circuit output to the output of the alarm sound circuit 31 (step 113).
. As a result, a notification sound is generated from the handset 15 of the radio telephone 2, so that the user of the radio telephone 2 knows that he/she has gone out of the communication area.

If it is determined that the received electric field has increased as a result of the movement of the wireless telephone 2 (step 101), the output of the receiver 18 is turned on (step 103), and the hybrid circuit 4 is controlled to receive signals from the output of the notification sound circuit 32. 1118 (step 114), the input of the transmission m5 is returned to the output of the hybrid circuit 4 (step 115), and the parent device 1 is returned to its original talking state.

On the other hand, when the electric field continues to decrease and 30 seconds have elapsed (step 104), a forced termination signal is sent to the wireless telephone 2 (step 105), the standby state is established, the transmitter a5 is turned off, and the
Disconnect from telephone number [13].

On the other hand, when the wireless telephone receives a forced call termination signal (
Step 201), immediately turns off the transmission t117 and enters the standby state.

In addition, step 106.107.108.202.20
The processing of 3.204.205 is similar to that shown in FIG.

Further, the notification tone circuit 31 may be replaced by a circuit that produces a hold tone in a wireless telephone device having a hold function.

〔Effect of the invention〕

As explained above, according to the present invention, even if the received electric field level decreases, the person on the other end of the conversation will not be in a silent state for a long period of time, so the person on the other end of the conversation will not feel uneasy. Also, on the wireless telephone side, lJ! It is also possible to notify the user that the device has determined that the distance is such that a call cannot be made, and to encourage the user to approach the parent device, so that even if the parent device forcibly disconnects the call, it will not be mistaken for a malfunction of the device. This has the advantage that it also eliminates

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the wireless telephone device according to the present invention, FIG. 2 is a flowchart explaining the operation of the practical example shown in FIG. FIG. 4 is a flowchart explaining the operation of the apparatus shown in FIG. 3. 1... Parent device, 2... Wireless phone, 3... Wired line, 4... Hybrid circuit, 5.17-... Transmitter, 6°18... Transmitting antenna, 7.13 ...Receiving antenna, 8.14--Receiver, 9.19--Sysizer, 10.20--Receiving electric field detection circuit, 11.2
1--Identification signal detection circuit, 12.22--Control circuit, 15--Telephone receiver, 16--Transmitter, 23--Speaker, 25--Rectification stabilization circuit, 26--・Current limiting resistor, 27° 28...Charging terminal, 29...Battery,
30--key unit, 31--alarm sound circuit, 32
...Notification sound circuit. Figure 1 Mat Koryo Denshu Figure 3 Factory P

Claims (2)

[Claims] (1) Comprising a parent device connected to a wired telephone line and a wireless telephone connected to the parent device via a wireless line,
The parent device is provided with received electric field level detection means for detecting a decrease in the received electric field level of the radio line, and means for cutting off the received audio from the wireless telephone in response to the detection output of the received electric field level detection means. In a wireless telephone device,
timer means that starts operating in response to the detection output of the received electric field level detection means and outputs a signal if the detected output of the received electric field level remains generated even after a predetermined period of time; and an output of the timer means. and means for transmitting a signal tone to the wired telephone line in response to the call. (2) The radiotelephone device according to claim (1), further comprising means for transmitting a signal tone to the radiotelephone in response to the output of the timer means.