JPH069245U - Cordless telephone device - Google Patents

Abstract

(57) [Summary] [Purpose] By pressing the call button twice within the set time, you can temporarily open and close the DC loop while maintaining the call channel.
Shorten the time when a call can be recalled. [Structure] When the call button of the operation unit 38 of the telephone 3 is pressed twice within a preset time by the timer unit 40, only the hook switch control information is provided from the control unit 41 to the telephone control unit 37 as the control information 41d. Then, the connection device control unit 26 of the connection device 2 with the call channel held.
Then, the hook switch circuit 21 is temporarily disconnected.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cordless telephone device in which a direct current loop of a telephone line can be opened for a time sufficient to restore an exchange and then closed again while maintaining a radio channel as a call channel.

[0002]

[Prior art]

 A cordless telephone device consists of a connection device connected to a telephone line and a portable telephone device, and radio waves are used for communication between the two. This cordless telephone device is a multi-channel device that selects an empty channel from multiple call channels and forms the call channel between the connection device and the telephone so that the limited call channels can be used equally by many devices. The channel access (MCA) method is adopted.

In the MCA method, the connection device and the telephone set are each configured to check the presence or absence of interference before transmitting. For example, when an incoming call is received, the connection device searches for a vacant channel among a plurality of communication channels and wirelessly transmits information of the vacant channel to the telephone by using the control channel. Based on the received information, the telephone side checks the availability of the designated call channel and confirms that it is free, and then shifts to the designated call channel. The connection device and the telephone communicate with each other and various control signals using this call channel.

When the telephone call is turned off (corresponding to on-hook) at the end of the call, an on-hook signal is wirelessly transmitted from the telephone to the connecting device using the call channel, and the hook switch of the connecting device is turned on. It goes off (on-hook state), the DC loop is opened, and the telephone line is opened. Then, the end signal is wirelessly transmitted from the telephone to the connecting device using the call channel, the wireless channel is released, and the connecting device returns to the standby state.

When making a call, when the call button is turned on (corresponding to off-hook) on the telephone side, a call signal is transmitted from the telephone to the connecting device using the control channel, and the connecting device transmits to the telephone side. The call channel specification information is transmitted, and the phone checks the vacancy of the specified call channel to confirm that it is vacant, and then moves to the specified call channel. 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).

[0006]

[Problems to be solved by the device]

 As described above, the conventional cordless telephone device has a configuration in which the call channel is set using the control channel. Therefore, when another cordless telephone device is already using the control channel, the control channel is free. It may take some time to switch to the call channel because the transmission and reception of information via the control channel is delayed.

[0007] In particular, when the user makes a dial error during dial operation and presses the call button to return to the on-hook state, then presses the call button again to put it in the off-hook state and performs dial operation again, or wants to dial immediately after the call ends. If you are in a hurry, such as when you are in a hurry, the time from when you press the call button to when you can operate the dial (dial tone is heard) is felt longer than necessary.

The present invention has been made to solve such a problem, and an object thereof is to provide a cordless telephone device capable of shortening the time from the end of a call state to the next dial.

[0009]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, a cordless telephone device according to the present invention provides a counting means for counting the number of times of key input of a call button, a timer means for measuring the elapsed time from the key input, and an output of the counting means and timer means. It is characterized in that it is provided with a control means for outputting hook switch control information based on the above, and is configured so that the DC loop of the telephone line can be opened and closed while holding the call channel by pressing the call button twice from the call state. .

[0010]

[Action]

 By continuously pressing the talk button on the telephone twice from the call state, the hook switch of the connection device can be opened and closed without opening the call channel of the telephone and the connection device, and the DC loop of the connection device can be opened and closed once. it can. Therefore, the time required for forming the communication channel using the control channel as in the normal call operation is not required. Therefore, it is possible to shorten the time from the end of the call until the dial operation becomes possible again.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a block diagram 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.

The connection device 2 is connected to the telephone line 4 for interfacing, and establishes a wireless channel with the telephone 3 for communication, and includes a hook switch circuit 21 and a line interface (I / F) unit 22. A modem / filter unit 23, a transmission / reception unit 24, an antenna 25 for both transmission and reception, and a connection device control unit 26.

The hook switch circuit 21 is configured to open and close the DC loop of the telephone line 4 based on the hook switch control signal 21b supplied to the control input terminal 21a.

The line interface (I / F) unit 22 detects an incoming signal (bell signal) transmitted from the central office side via the telephone line and outputs an incoming call detection signal 22a, and an incoming call detection circuit. In addition to a dial signal sending circuit that inputs the dial control signal 22b and sends a DP or PB dial signal to the telephone line 4, and a balance circuit, etc., 2-wire-4 wire that interfaces between a wired communication system and a wireless communication system. A conversion circuit is provided.

The 2-wire to 4-wire conversion circuit efficiently extracts the reception signal sent through the telephone line 4, supplies the extracted reception signal 22c to the voice input terminal 23a of the modem / filter unit 23, and The transmission signal 22d supplied from the voice output terminal 23b of the modem / filter unit 23 is efficiently transmitted to the telephone line 4.

The modem / filter unit 23 includes a filter unit for processing voice signals of a transmission signal and a reception signal, and a modem unit (conversion unit for processing transmission data (TD) and reception data (RD)). Demodulation section).

The transmission system filter circuit of the filter unit removes or attenuates the high frequency components of the voice signal of the transmission to process so that the frequency band of the radio signal does not become wider than a predetermined range. Is configured to suppress the high level of and to expand the low level. Specifically, the received signal 22c from the telephone line 4 supplied to the audio signal input terminal 23a is non-linearly compressed and supplied to the transmission signal input terminal 24a of the transmission / reception unit 24.

The reception system filter circuit of the filter unit extracts a voice signal from the detection signal (voice signal and reception data signal) 24c output from the reception signal output terminal 24b of the transmission unit 24 and performs a nonlinear expansion process ( The processed voice signal is output as a transmission signal 22d from the voice signal output terminal 23b.

The modem unit (modulation / demodulation unit) includes a modulation unit and a demodulation unit. The modulation unit converts the bit-serial transmission data signal TD supplied to the transmission data input terminal 23f into a signal within the audio frequency band according to the logical level, and the modulation signal 23d obtained by the conversion is transmitted / received by the transmission / reception unit 24. To the transmission signal input terminal 24a. Since the modulated signal 23d is configured to be output prior to the audio signal 23c subjected to the nonlinear compression processing, the audio signal 23c is cut off while the modulated signal 23d is being output. However, since the duration of the output of the modulated signal 23d is extremely short, there is almost no hindrance to a normal call.

The demodulation unit extracts a received data signal component from the detected signal 24c output from the received signal output terminal 24b of the receiving unit 24e in the transmitting / receiving unit 24 and demodulates it, and outputs the demodulated output to the receiving data output terminal. 23e outputs as a reception data signal (RD).

The transmitting / receiving unit 24 includes a transmitting unit 24d, a receiving unit 24e, and a synthesizer unit 24f. The channel for transmission and reception is set by the synthesizer unit 24f based on the transmission / reception channel designation information 26a supplied from the connection device control unit 26. Whether to perform transmission and reception is controlled based on the transmission / reception control information 26b supplied from the connection device control unit 26.

When the reception level of the call channel designated based on the transmission / reception channel designation information 26a exceeds a preset threshold value, the receiving unit 24e sends the call channel to another cordless telephone device. It is configured to generate a carrier sense signal 24g indicating that it is being used.

The connection device control unit 26 is configured by using a microcomputer. The connection device control unit 26 outputs the transmission / reception channel designation information 26a to designate a channel (control channel, call channel) for transmission / reception, and monitors whether or not the channel is vacant based on the carrier sense signal 24g. In addition, the connection device control unit 26 sends and receives information to and from the telephone 3 to control the channel to be used, and performs incoming call response processing based on the incoming call detection signal 22a, and transmission from the telephone 3 side, for example. In response to a call request or a disconnection request, the hook switch circuit is controlled to output a hook switch control signal 21b for opening / closing a DC loop, or for a wireless communication channel for communication between the connection device 2 and the telephone 3. Controls closing or opening. Further, the overall operation of the cordless telephone device 1 such as transmission of a dial signal in response to an operation from the telephone 3 side and hold processing is controlled.

Transmission and reception of various types of information between the connection device 2 and the telephone set 3 are performed by radio signals through a control channel or a call channel, and each state from incoming call to call, from standby state to call and from call to standby state. In the case of shifting to, the control channel is switched to the speech channel or the speech channel is switched to the control channel. The cordless telephone device 1 according to the present invention receives the control information by the operation of the call button (hook switch) of the telephone 3, and the connection device control unit 26 outputs the hook switch control signal 21b while keeping the call channel. The hook switch circuit 21 is configured to open immediately after opening for the time required to restore the exchange side.

Next, the configuration of the telephone 3 will be described. The telephone set 3 includes a transmitting / receiving antenna 31, a transmitting / receiving section 32, a modem / filter section 33, a receiving amplifier 34, a receiving set 35, a transmitting set 36, a telephone control section 37, an operating section 38, and a call. It comprises counting means 39 for counting the number of button key inputs, timer means 40 for counting the time elapsed from the call button key input, and control means 41.

The configurations of the transmission / reception unit 32 and the modem / filter unit 33 are the same as those of the connection device 2. The voice signal input terminal 33a of the modem / filter unit 33 is supplied with the voice signal transmitted from the transmitter 36, and the voice signal output terminal 33b of the modem / filter unit 33 outputs the voice signal to the voice amplifier 34. It is amplified and configured to drive the handset 35.

The telephone controller 37 is configured by using a microcomputer. The telephone control unit 37 is configured to control the telephone 3 in accordance with an operation input 38b from the operation unit 38, generate transmission data td in accordance with the operation input, and send the transmission data td to the connection device 2. . In addition, the transmission / reception channel designation information 37a is output to designate a channel for transmission / reception (control channel, communication channel), and it is monitored whether or not a channel is available based on the carrier sense signal 32g, and transmission / reception control information is displayed. The connection device control unit 26 of the connection device 2 is similar to the connection device 2 in that it outputs 37b to control the transmission / reception state. Further, the transmission data td output from the transmission data output terminal 37c of the telephone control unit 37 is supplied to the transmission data input terminal 33c of the modem filter unit 33, and the reception data rd output from the modem filter unit 33 is supplied. Is supplied to the input terminal 37d of the telephone control section 37.

The cordless telephone device 1 according to the present invention provides the key information 38a of the call button of the operation unit 38 to the counting means 39 and the timer means 40, and the counting means 39 counts the number of key inputs and count information. 39a is provided to the count information input terminal 41a of the control unit 41, and the timer means 40 measures the elapsed time from key input and compares it with a preset time, and outputs the corresponding timer output information 40a to the control unit 41. It is provided to the timer information input terminal 41b. The control means 41 is configured to take in the count information 39a of the counting means 39 and the timer information 40a of the timer means 40, and to provide the telephone controller 37 with the control information 41d from the output terminal 41c of the control means 41. To do.

The counting means 39 is reset in the call state, and when the call button is pressed to end the call, the number of key inputs is counted, and the preset time of the timer means 40 from the first key input ( If there is a second key input within T1), the control means 41 judges from the counting information 39a and the timer information 40a that the hook switch operation is a re-call (redial) with the call channel still open. Only the hook switch control information is placed on the control information 41d and provided to the telephone control unit 37. If the call button is pressed only once from the call state, the hook switch control information is followed after the preset time (T1) of the timer means 40 has elapsed, and the call-end information for releasing the call channel. Is provided to the telephone control unit 37. In addition, during the time (T1) preset by the timer means 40, the reconnection is effective when the telephone line 4 is opened once by the hook switch circuit 21 of the connection device 2 and then closed again (dial from the telephone line 4). The time is such that a tone occurs), and the time is as short as possible.

The timer means 40 is activated by the first key information 38a from the call button, and is stopped after the set time (T1) has elapsed regardless of the second key input, or by the second key input. It can be configured to start again. Further, the timer means 40 can be composed of a clock timer or a mono-multi.

FIG. 2 shows a state diagram of the cordless telephone device according to the present invention. Figure (a) shows the state diagram when the call button is pressed once, and (b) shows the state diagram when the call button is pressed twice within the set time (T1). The control information 41d of the control means 41 includes the hook switch control information and the call end information, and when the call button is pressed only once, as shown in (a), the set time has elapsed since the call button was pressed. After T1 time, the call end signal is output, the wireless channel shifts from the call channel to the control channel, the hook switch information remains at the “L” level, the hook switch circuit 21 of the connection device 2 is opened, and the cordless power is supplied. The talking device 1 is in a standby state.

When the call button is pressed twice within the set time (T1), the hook switch information changes from the “L” level to the “H” level after the set time T1 as shown in FIG. The hook switch circuit 21 of the connection device 2 is closed, while the end call signal is not generated and the wireless channel is kept as the call channel, the cordless telephone device 1 enters the calling state, and the dial tone is sent from the telephone line 4. And the dial can be operated.

[0033]

[Effect of device]

 As described above, the cordless telephone device according to the present invention enables the hook switch of the connection device to be held while maintaining the call channel of the telephone device and the connection device by continuously pressing the call button of the telephone twice from the call state. It can be opened and closed, and the direct current loop of the connecting device can be opened and closed once. Therefore, the time required for forming the communication channel using the control channel as in the normal call operation is not required. Therefore, it is possible to shorten the time from the end of the call until the dial operation becomes possible again.

[Brief description of drawings]

FIG. 1 is a block configuration diagram of a cordless telephone device.

FIG. 2 is a state diagram of a cordless telephone device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cordless telephone device 2 Connection device 3 Telephone 21 Hook switch circuit 23, 33 Modem filter part 24, 32 Transmission / reception part 26 Connection device control part 37 Telephone control device 38 Operation part 39 Counting means 40 Timer means 41 Control means

Claims (1)

[Scope of utility model registration request] 1. A cordless telephone device comprising a connecting device connected to a telephone line and a telephone communicating wirelessly with the connecting device, and counting means for counting the number of times a call button is pressed by a key, and an elapsed time from the key input. Timer means for counting the time, and control means for outputting hook switch control information based on the outputs of the counting means and the timer means,
A cordless telephone device characterized in that a DC loop of a telephone line can be opened and closed while holding a call channel by pressing the call button twice from a call state.