JPH0621879A - Cordless telephone set - Google Patents

Abstract

PURPOSE:To shorten the period of time until such time as speech dial operation is made available by performing transmission reception of information relating to a speech channel setting between a telephone set and a connector through an optical signal or electric direct coupling. CONSTITUTION:When a telephone set 3 is separated from a connector 2, the communication between the connector 2 and the telephone set 3 is performed by using a radio wave. In this case, in a state that the telephone set 3 is mounted on the connector 2, connector sections 27, 41 for exclusive use of information transmission reception are connected electrically. Thus, the transmission data TD from the connector 2 are directly sent to the data input terminal 37e of the control section 37 of the telephone set 3 via the connector sections 27, 41 for exclusive use of information transmission reception. Similarly the transmission data (td) on the telephone set 3 are directly fed to the data input terminal 25c of the connector 2. Moreover, control sections 25, 37 process the data fed via the connector sections 27, 41 for exclusive use of information transmission reception with priority.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called one-piece type cordless telephone device in which a telephone can be attached to a connecting device for interfacing with a telephone line.

[0002]

2. Description of the Related Art A cordless telephone device comprises a connection device connected to a telephone line and a portable telephone, and radio waves are used for communication between them. In this cordless telephone device, multi-channel access that forms a communication channel between a connection device and a wireless telephone by selecting an empty channel from a plurality of communication channels so that a limited communication channel can be used evenly by many devices. (MCA) method is adopted.

In the MCA system, the connection device and the telephone set are each configured to check the presence of interference before transmitting. For example, when an incoming call is received, the connection device searches for a vacant channel from a plurality of call channels and wirelessly transmits the vacant channel information to the telephone using the control channel. The phone side checks the availability of the specified call channel, and after confirming that it is available,
The designated call channel is entered, and a call and various control signals are communicated using this call channel.

When making a call, a call request is transmitted from the telephone side to the connecting device via the control channel, and the calling device receives the call channel designation information from the connecting device to carry out a call and communication. Since the control channel is commonly used by a plurality of cordless telephone devices, its use time is limited to several seconds (for example, 4 seconds for the connection device and 1 second for the telephone).

In the case of using a rechargeable secondary battery as the power source of the telephone, the power is supplied from the connecting device to the telephone via the charging terminal while the telephone is mounted on the connecting device. It is also known that the secondary battery is charged. Further, on the telephone side, a so-called power saving control is known in which the life of the battery is extended by intermittently performing control channel monitoring operation and the like.

[0006]

As described above, since the conventional cordless telephone apparatus is configured to set the communication channel via the control channel, when another cordless telephone apparatus has already used the control channel. Must wait for the control channel to become available, and transmission and reception of information via the control channel may be delayed, so it may take some time before switching to the call channel.

Further, since the incoming call display on the telephone side is controlled by the incoming call display command from the connecting device side after shifting to the call channel, the incoming call display on the cordless telephone side is made after the bell or the like on the connecting device side rings. By 1 at the earliest
There is a delay of seconds, usually 2-3 seconds.

The present invention has been made to solve the above problems, and its purpose is to shorten the time required for switching to a communication channel and shorten the time required for answering an incoming call and making a call. To provide.

[0009]

In order to solve the above-mentioned problems, a cordless telephone device according to the present invention relates to a call channel setting between a telephone and a connection device in a standby state in which the telephone is attached to the connection device. It is characterized in that information is transmitted and received by an optical signal including infrared rays or an electrical direct coupling without using a control channel via radio waves.

Information relating to the call channel setting between the telephone and the connection device is sent and received by using the charging terminal for charging the secondary battery in the telephone and supplying the power. It may be configured as follows.

[0011]

When the telephone is mounted on the connecting device, the information can be directly transferred between the telephone and the connecting device without using the control channel. Therefore, it is not necessary to detect the empty control channel, and
Information can be transmitted / received at any timing without being restricted by the time for which the control channel can be used. Therefore, it is possible to search for a free call channel in advance and wait in a state where a call and communication on the free call channel are possible. Therefore, it is possible to shorten the time from the off-hook of the waiting telephone to the time when the telephone becomes available and the time until the dial operation becomes possible.

Further, by adopting a configuration in which information is transmitted and received by using a charging terminal for supplying electric power for charging a secondary battery in the telephone, information can be stored without providing a new terminal or the like. You can send and receive.

[0013]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a block configuration of a cordless telephone device according to the present invention. The cordless telephone device 1 shown in FIG. 1 includes a connection device 2 and a telephone 3. FIG. 1 shows a state in which the telephone 3 is attached to the connection device 2.

The connection device 2 interfaces with the telephone line 4, and includes a line interface (I / F) unit 21, a modem / filter unit 22, a transmission / reception unit 23,
A transmission / reception antenna 24, a control unit 25, a buffer circuit 26, and a connector unit 27 dedicated to information transmission / reception on the connection device side.
A power supply unit 28 and a power supply connector unit 29.

The line interface (I / F) unit 21 is
A loop closing circuit that controls closing / opening of the DC loop of the telephone line 4 based on the loop closing command signal 21a, and an incoming call detection signal 21b by detecting an incoming call signal (bell signal) sent from the central office side. Is provided, a dial circuit for transmitting a dial signal (line selection signal) based on dial information (not shown), a 2-line to 4-line conversion circuit, and the like.

The 2-wire to 4-wire conversion circuit efficiently extracts the reception signal sent through the telephone line 4 and supplies the extracted reception signal 21c to the voice signal input terminal 22a of the modem / filter unit 22. At the same time, the transmission signal 21d supplied from the voice signal output terminal 22b of the modem / filter unit 22 is efficiently transmitted to the telephone line 4.

The modem / filter unit 22 includes a filter unit for performing processing regarding each voice signal of transmission and reception.
A modem unit (modulation / demodulation unit) that performs processing relating to transmission data TD and reception data RD is provided.

The transmitting system filter circuit in the filter section removes or attenuates the high frequency component of the voice signal so as to prevent the frequency band of the radio signal from expanding beyond a predetermined range, and suppresses the high level of the voice signal. It is configured to perform a non-linear compression process that raises the low level, and specifically removes the high frequency component of the reception signal 21c from the telephone line 4 supplied to the voice signal input terminal 22a, and also converts the reception signal 21c into the reception signal 21c. On the other hand, the audio signal 22c subjected to the nonlinear compression processing is transmitted to the transmission signal input terminal 23a of the transmission / reception unit 23.
Supply to.

The reception system filter circuit in the filter section extracts a voice signal from the detection signal (voice signal and received data signal) 23c output from the reception signal output terminal 23b of the transmission / reception section 23 and performs nonlinear expansion / contraction processing (non-linear expansion processing). A process opposite to the compression process) is performed, and the signal subjected to the process is output from the audio signal output terminal 22b as the transmission signal 21d.

The modem section (modulation / demodulation section) comprises a modulation section and a demodulation section. The modulation unit converts the bit-serial transmission data signal TD supplied to the transmission data input terminal 22c into a signal within an audio frequency band according to the logical level, and transmits the converted modulation signal 22d to the transmission / reception unit 23. The signal is supplied to the signal input terminal 23a. The modulated signal 22d is configured to be output with priority over the audio signal 22c that has been subjected to the nonlinear compression processing. That is, the voice signal 22c is cut off while the modulated signal 22d is being output, but since the duration of the modulated signal 22d is extremely short, it does not hinder a normal call.

The demodulator is a receiver 23b in the transmitter / receiver 23.
The received data signal component is extracted and demodulated from the detected signal 23c output from the received signal 23c, and the demodulated output is output from the received data output terminal 22e as the received data signal RD.

The transmitter / receiver 23 includes a transmitter 23d, a receiver 23e, and a synthesizer 23f. The channel for transmission and reception is set by the synthesizer unit 23f based on the transmission / reception channel designation information 25a supplied from the control unit 25. Whether to perform transmission and reception is controlled based on the transmission / reception control command 25b supplied from the control unit 25.

When the reception level of the call channel designated on the basis of the transmission / reception channel designation information 25a exceeds a preset threshold value, the receiver 23e uses the call channel for another cordless telephone device. It is configured to output a carrier sense signal 23g that indicates that

The control unit 25 is composed of a microcomputer. The control unit 25 outputs the transmission / reception channel designation information 25a to designate a channel (control channel, call channel) for transmission / reception, and the carrier sense signal 2
Monitor for free channels based on 3d. The control unit 25 sends and receives information to and from the telephone 3 and controls a channel to be used, and performs an operation on the telephone 3 side such as an incoming call response process based on the incoming call detection signal 21b and a call request from the telephone 3 side. The whole operation of the cordless telephone device 1 such as closing / opening the DC loop and sending a dial signal is controlled according to the contents.

Transmission and reception of various kinds of information between the connection device 2 and the telephone 3 are carried out by radio signals through a control channel or a call channel. The cordless telephone device 1 according to the present invention is not limited to information transmission and reception using radio waves. Telephone 3 is connection device 2
If it is attached to the
Information can be sent and received via the Internet.

In this embodiment, the transmission data TD output from the transmission data output terminal 25c of the control unit 25 is supplied to the transmission data input terminal 22c of the modem / filter unit 22 and the connector unit 27 is also provided via the buffer circuit 26.
The transmission data TD from the connection device 2 to the telephone 3 side is supplied to the telephone 3 side in the form of wired transmission.

The control unit 25 is also a modem / filter unit 2
In addition to the input terminal 25d for the received data RD output from the second terminal 2, the upside terminal 27b of the connector unit 27 is provided with a received data input terminal 25e for directly receiving the transmission data td output from the telephone 3 side. The control unit 25 is configured to preferentially process the reception data (transmission data td on the telephone 3 side) given to the reception data input terminal 25e.

The power source unit 28 is a commercial power source (AC100V).
Is used as an input, and a DC power supply VCC is supplied to each part in the connection device 2 and a DC power supply VBB for charging is supplied to the telephone 3. The charging DC power supply VBB is configured to be supplied to the telephone 3 side via the charging connector portion 29.

Next, the configuration of the telephone will be described. Phone 3
Is a transmission / reception antenna 31, a transmission / reception unit 32, a modem / filter unit 33, a reception amplifier 34, and a reception unit 35.
It includes a transmitter 36, a control unit 37, an operation unit 38, a buffer circuit 39, a power supply circuit 40, an information transmission / reception dedicated connector unit 41 on the telephone 3 side, and a charging connector unit 42.

The structures of the transmission / reception unit 32 and the modem / filter unit 33 are the same as those of the connection device 2. Modem filter section 3
The voice signal from the transmitter 36 is supplied to the voice signal input terminal 33a of No. 3. The reception signal output from the voice signal output terminal 33b of the modem / filter unit 33 is the reception amplifier 3
It is amplified by 4 and drives the handset 34.

The control section 37 is constructed by using a microcomputer. The control unit 37 controls the telephone 3 side according to an operation input from the operation unit 38, and also generates transmission data TD according to the operation input and sends it to the connection device 2 side. The transmission / reception channel specification information 37a is output to specify a channel (control channel, call channel) for transmission / reception, and the carrier sense signal 3
Monitor for free channels based on 2g,
The point that the transmission / reception control command 37b is output to control the transmission / reception state is the same as the control unit 25 on the connection device 3 side.

The transmission data td output from the transmission data output terminal 37a of the control unit 37 is transferred to the modem / filter unit 33.
To the transmission data input terminal 33c of the connector unit 41, and also through the buffer circuit 39 to the upside terminal 41 of the connector unit 41.
The transmission data td from the telephone 3 to the connection device 2 side is supplied to the telephone 3 side in the form of wired transmission.

Further, the control unit 37 is a modem / filter unit 3
In addition to the input terminal 37d for receiving the received data rd output from the third terminal 3, the downstream side terminal 41a of the connector section 41 is provided with the received data input terminal 37e for directly receiving the transmission data TD output from the connection device 2 side. . Then, the control unit 37 is configured to preferentially process the reception data (transmission data TD on the connection device 2 side) given to the reception data input terminal 37e.

The power supply circuit 40 is a rechargeable secondary battery 40.
In the case where the charging control circuit 40b for controlling the charging current to the a and the diodes 40c and 40d for backflow prevention are provided and the DC power source VBB for charging is supplied through the charging connector portion 42, The secondary battery 40a is configured to be charged.

Next, the operation of the cordless telephone device 1 shown in FIG. 1 will be described. When the telephone 3 is separated from the connection device 2, all communication between the connection device 2 and the telephone 3 is performed using radio waves. When the telephone 3 is attached to the connection device 2, the connector portions 27 and 41 dedicated to information transmission / reception are provided.
Is electrically connected, the transmission data TD from the connection device 2 side is transmitted through the information transmission / reception dedicated connector portions 27 and 41 to the data input terminal 37e of the control portion 37 on the telephone 3 side. Be transmitted directly to. Similarly, the transmission data td on the telephone 3 side is directly supplied to the data input terminal 25c on the connection device 2 side.

Since the control units 25 and 37 are configured to preferentially process the data supplied through the respective connector units 27 and 41 dedicated to information transmission / reception, the respective connector units 27 dedicated to information transmission / reception. , 41, information can be transmitted and received between the connection device 2 and the telephone 3 side. Therefore, the telephone 3
In the state where is attached to the connection device 2, it is possible to specify the call channel and detect the vacancy of the call channel without using the control channel and the call channel, so that the necessary information transmission / reception can be completed in the form of wired transmission. Phone 3 by placing
It is possible to quickly make a call or dial a state from the time when the mobile phone shifts to the off-hook state.

When the telephone 3 is configured to intermittently receive radio waves and operate the control unit 37 in the standby state, the charging DC power source VBB is supplied to the charging connector unit 42. This may be detected by a voltage detection circuit (not shown) or the like, and the telephone 3 may be switched from the intermittent operation to the continuous operation based on the voltage detection output (not shown).

In the case of the telephone 3 which is not equipped with the charging connector portion 42, a pull-up resistor or a pull-down resistor is connected to the data input terminal 37c of the control portion 37, and the telephone 3 is attached to the connection device 2. Therefore, the potential of the data input terminal 37c may be changed, and the intermittent operation may be switched to the continuous operation based on the change of the potential. Further, the continuous operation may not be immediately switched at the time of mounting, but may be switched to the continuous operation at the time when it is detected that some signal is transmitted from the connection device 2.

FIG. 2 is a block diagram of a cordless telephone device which transmits and receives information by using optical coupling means. The connection device 50 is configured to drive the light emitting element 51 to emit light based on the transmission data TD. Telephone 6
0 is provided with a light receiving element 61 at a position where the optical signal from the light emitting element 51 can be received in the mounted state. Phone 60 as well
Further, the light emitting element 62 is configured to be driven to emit light based on the transmission data td, and the connection device 50 is provided with the light receiving element 52 at a position where the optical signal from the light emitting element 62 can be received with the telephone 60 mounted. ing.

Reference numerals R1 and R2 are current limiting resistors. Further, in this embodiment, the light receiving element 52,
Although the configuration using a light receiving element (light receiving module) including a light receiving element body such as a phototransistor or photodiode and its load resistance and an amplification / waveform shaping circuit is shown in 61, the output of the phototransistor or the like is sent to each control unit. It may be directly supplied.

With the above configuration, information can be transmitted and received by optical coupling when the telephone 60 is attached to the connection device 50. In the case of optical coupling, mechanical precision can be relaxed because no physical connecting means such as a connector is required. In addition, the connection device 50 side and the telephone 60
Since the power supply on the side is separated, information can be transmitted / received even if the connector is not provided for charging. Note that infrared light other than visible light may be used as the optical signal.

FIG. 3 is a block diagram of a cordless telephone device according to the second aspect. A cordless telephone device 70 according to claim 3 includes a secondary battery 40 provided in a telephone 73.
The charging terminals for charging d (the charging connector 29 on the connection device 72 side and the charging connector 42 on the telephone set 73 side) are used to supply power and send and receive information.

Since the power supply line has a low impedance for signals, choke coils L1 and L2 are provided in the connection device 72 and the power supply line on the positive electrode side of the telephone set 73, respectively.

Then, the modulated signal 74a obtained by modulating the transmission data TD output from the controller 25 on the side of the connection device 72 by the FSK modulator 74 is used for charging the respective connectors 29, 42.
The FSK demodulation section 75 provided on the telephone 73 side supplies the signal 75a demodulated to the original data to the reception data input terminal 37c of the control section 37.

Similarly, the transmission data td on the telephone set 73 side
Is modulated by the FSK modulator 76, and the modulated signal 76
a is a connecting device 7 via the charging connectors 42 and 29.
The signal 7 sent to the second side and demodulated by the FSK demodulation unit 77
7a is supplied to the reception data input terminal 25c of the control unit 25.

Here, the FSK modulator 7 on the connection device 72 side
4 and the FSK demodulation section 76 on the side of the telephone set 73 have different modulation frequencies. That is, information is exchanged between the connection device 72 and the telephone set 73 by performing frequency multiplex transmission through the charging connectors 29 and 42.

FIG. 4 is a block diagram of the essential parts of another cordless telephone device according to the second aspect. The cordless telephone device 81 transmits / receives the output signals of the modem / filter units 23 and 32 via a power supply line for charging.

On the side of the connecting device 82, it is detected that the telephone set 83 is attached by monitoring the current of the power source line for charging by the current detecting portion 84 provided in the power source line. When the current detection output 84a is supplied, the control unit 85 outputs the input / output signal switching command 86 and switches the switching circuit 87 to the connection state indicated by the dotted line in the figure. As a result, the signal supplied from the modem / filter unit 22 to the transmitting unit 23d is supplied to the input terminal 89a of the hybrid unit 89 via the level adjusting unit 88 on the sending side, and the power is supplied from the input / output terminal 89b of the hybrid unit 89. It is sent to the telephone set 83 side through the supply line.

The telephone 83 side is provided with a voltage detector 91, which detects that the telephone 83 is in a power feeding state from the outside. The configuration may include a current detection unit similar to the connection device 82. When the control unit 92 determines that the telephone set 83 is attached to the connection device 82 based on the voltage detection output 91a, it outputs the input / output signal switching command 93 and sets the switching circuit 94 to the connection state indicated by the dotted line in the figure. Switch. As a result, the signal from the connecting device 82 supplied to the input / output terminal 95a of the hybrid section 95 via the connector 42 is output from the output terminal 95b, and passes through the level adjusting section 97 on the receiving side and the switching circuit 94 to the modem The signal is supplied to the reception signal input terminal of the filter unit 33.

The signal output from the modem / filter unit 33 on the telephone set 83 side is supplied to the input terminal 95c of the hybrid unit 95 via the level adjusting unit 98 on the sending side, and the power is supplied from the input / output terminal 95a of the hybrid unit 89. It is sent to the connecting device 82 side through the supply line.

The signal sent from the telephone set 83 side is passed from the output terminal 89c of the hybrid section 89 on the connection device 82 side to the receiving side input terminal of the modem / filter section 22 through the receiving side level adjusting section 90 and the switching circuit 87. Supplied.

In this way, the connection device 82 and the telephone 8
Information is exchanged with the communication unit 3 via the power supply line for charging. Each of the level adjusting circuits 88, 90, 97, 98 is provided with a capacitor or the like for adjusting the level of a signal to be transmitted and received and for blocking direct current in the power supply line. The level adjusting circuit may not be provided on both the sending side and the receiving side, but may be provided on either side.

When it is detected that the telephone set 83 is attached based on the current detection output 84a or the voltage detection output 91a, the control units 85 and 92 constantly monitor the reception signal input terminals 25d and 37d, respectively. When it is confirmed that the information is not sent from the side, if the one-way communication is always performed as the configuration for starting the information transmission, the hybrid units 89 and 95 may not be provided.

Since the cordless telephone device 81 shown in FIG. 4 has the above-described configuration, the modem / filter units 22 and 33 on the connection device 82 side and the telephone set 83 side are connected by using the power supply line for charging. Since the configuration is such that information is transmitted and received, it is not necessary to newly provide a modulation / demodulation unit when transmitting and receiving digital information.

FIG. 5 is a block diagram of a main part of a cordless telephone device for transmitting and receiving a high frequency signal output from a transmitting / receiving unit through a power line for charging. This cordless telephone device 101 includes transmitting / receiving units 23, 32 and antennas 24, 3
In the state where the telephone set 103 is attached to the connection device 102 with the switching circuits 104 and 105 provided between the transmission and reception terminals 1 and 1, the high-frequency signals output from the transmission / reception units 23 and 32 are blocked by the capacitors C1 and DC1, respectively. Transmission / reception is performed via C2 and charging connector portions 29 and 42.

Since the frequency of the high frequency signal output from the connection device 102 side and the frequency of the high frequency signal output from the telephone 103 side are different, bidirectional communication is possible without providing a special circuit or the like.

[0057]

As described above, in the cordless telephone apparatus according to the first aspect of the present invention, when the telephone is attached to the connection device, transmission / reception of information relating to the communication channel setting between the telephone and the connection device is performed by an optical signal. Alternatively, since the configuration is performed by electrical direct coupling, it is possible to send and receive information without using a wireless control channel. Therefore, it is possible to search for an idle call channel in advance and wait in a state where a call or communication on the idle call channel is possible. Therefore, it is possible to shorten the time from the off-hook of the waiting telephone to the time when the telephone becomes available and the time until the dial operation becomes possible.

Since the cordless telephone device according to the second aspect is configured to use the charging terminal for charging the secondary battery in the telephone, information can be transmitted and received without providing a new terminal. .

[Brief description of drawings]

FIG. 1 is a block configuration diagram of a cordless telephone device according to the present invention.

FIG. 2 is a block configuration diagram of a cordless telephone device that transmits and receives information using optical coupling means.

FIG. 3 is a block configuration diagram of a cordless telephone device according to claim 2.

FIG. 4 is a block diagram of a main part of another cordless telephone device according to claim 2;

FIG. 5 is a block diagram of a main part of a cordless telephone device that transmits / receives a high-frequency signal output from a transmitter / receiver via a power line for charging.

[Explanation of symbols]

 1, 11, 71, 81, 101 Cordless telephone device 2, 50, 72, 82, 102 Connection device 3, 60, 73, 83, 103 Telephone 22, 33 Modem filter unit 23, 32 Transmitter / receiver unit 25, 37, 85 , 92 control unit 27, 41 information transmission / reception dedicated connector unit 29, 42 charging connector unit (charging terminal) 51, 62 light emitting element 52, 61 light receiving element 74, 75 FSK modulation unit 76, 77 FSK demodulation unit 84 current detection Section 89, 95 hybrid section 91 voltage detection section

Claims (2)

[Claims] 1. A cordless telephone device in which a telephone set can be attached to a connection device, and, in a state where the telephone set is attached to the connection device, transmission / reception of information relating to a call channel setting between the telephone set and the connection device. A cordless telephone device characterized by being configured by an optical signal or an electrical direct coupling without using radio waves. 2. Transmission / reception of information relating to a call channel setting between the telephone and the connection device uses a charging terminal for charging a secondary battery in the telephone, and supplies information together with supply of power. The cordless telephone device according to claim 1, wherein the cordless telephone device is configured to perform transmission and reception.