JPH07107552A - Cordless telephone set - Google Patents

Abstract

PURPOSE:To immediately set a service state just after a hand set is picked up without any dead time when making a telephone call utilizing an on-hook function. CONSTITUTION:Concerning the cordless telephone set in which a call between a master unit and a hand set is enabled by closing a radio path, this telephone set is provided with a dial operation part installed at the master unit, an on- hook switch 10 for switching to an on-hook mode to make dial call originating possible while receiving a call by a monitor speaker 2, an on-hook detecting means for detecting the operation of the on-hook switch 10, and a radio path closing means for closing the radio path between the master unit and the hand set based on the detection output of the on-hook detecting means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cordless telephone which can immediately enter a talking state without causing dead time immediately after a handset is lifted.

[0002]

2. Description of the Related Art As shown in the basic structure of FIG. 5, a cordless telephone is composed of a main unit, which is a main body of a connecting device, and a handset, which is a handset.
By connecting with a wireless path such as a (multi-channel access) method, the master unit and the slave unit are connected so that they can communicate.

[0003]

By the way, in cordless telephones and other recent telephones, dial operation is performed while listening to a monitor speaker while a child device is placed, and when the other party comes out, the child device is lifted. It has a convenient function called so-called on-hook mode for entering a call.

When making a call using the on-hook mode, a corded cord type telephone that connects a base unit and a handset (hereinafter referred to as a handset) with a cord such as a curl cord causes the other party to come out of the handset. Since the hook switch is mechanically raised at the same time when the handset is lifted to form a communication path between the base unit and the handset, it is possible to talk to the partner at the same time as the handset is lifted, without causing any problems.

However, in the case of a cordless telephone,
Even if the other party goes out and lifts the slave unit, the connection process for forming the communication path between the master unit and the slave unit must be performed by first blocking the wireless path between the master unit and the slave unit. The handset cannot enter the call state until the end. For this reason, there is a problem that dead time occurs in which a call cannot be made immediately even if the handset is lifted to talk.

The present invention has been made to solve the above problems, and an object thereof is to cause dead time immediately after lifting a handset when making a call using the on-hook function. It is to provide a cordless telephone that can immediately enter into a call state without a call.

[0007]

In order to solve the above-mentioned problems, the present invention provides a cordless telephone in which a base unit and a handset can communicate with each other by blocking a wireless path, and a dial operation unit provided in the base unit. And an on-hook switch for switching to an on-hook mode capable of dialing while receiving a call through a monitor speaker, an on-hook detecting means for detecting an operation of the on-hook switch, and a base unit and a slave unit based on a detection output of the on-hook detecting means. It is configured by including a wireless path blocking unit that blocks a wireless path.

[0008]

When the on-hook switch is operated to make a call in the on-hook mode, the on-hook switch detecting means detects this and sends a detection signal to the wireless path closing means. Upon receiving this detection signal, the wireless path blocking means starts blocking processing of the wireless path between the parent device and the child device. Before the dial operation is completed and the other party exits, the wireless path between the master unit and the slave unit is blocked, and the master unit and the slave unit are set to be in a state where they can talk with each other at any time. Therefore, it is possible for the other party to go out and lift the child machine, and at the same time, talk with the other party.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 2 is a block diagram of a master unit of a cordless telephone according to one embodiment of the present invention, and FIG. 3 is a block diagram of a slave unit.

First, the configuration of the master unit shown in FIG. 2 will be described. Reference numeral 1 denotes a ring circuit for detecting an incoming call to the outside line terminals L ₁ and L ₂ and making a ringing tone from the monitor speaker 2. Reference numeral 3 denotes a reception signal input from the outside line via the detection circuit 4 and the line control circuit 5. It is a call circuit that sends out to the outside line side the sending signal sent from the slave unit while sending out to the machine side.

Reference numeral 6 denotes a wireless transmission / reception unit for forming a wireless communication path according to the MCA (multi-channel access) system with a slave unit, and 7 denotes compression / expansion of voice signals input / output to / from the wireless transmission / reception unit 6. 8 to reduce noise by
Is a modem for exchanging MCA control commands, data, and other necessary information with the slave unit.

Reference numeral 9 is a dial button, 10 is an on-hook switch for switching to the on-hook mode, 11 is a charging terminal for charging the slave unit, 12 is a charge monitoring circuit for monitoring the charging state, and 13 is hands-free in the on-hook mode. A microphone 14 for talking is a control circuit including a microcomputer for controlling the operation of the entire parent device.

The master unit is provided with not only the dial button 9 and the on-hook switch 10 shown in the figure, but also various other operation buttons and switches, but these are omitted because they are not directly related to the present invention.

Next, the configuration of the slave unit shown in FIG. 3 will be described. Reference numeral 21 is a wireless transmission / reception unit for forming a wireless communication path with the base unit by the MCA method, and 22 is a wireless transmission / reception unit 21.
A compander that compresses / expands a voice signal transmitted / received in order to reduce noise, and 23 is a modem that exchanges MCA control commands, data, and other necessary information with a slave unit.

Reference numeral 24 is a microphone constituting a transmitter, 25 is a receiver constituting a receiver, 26 is a dial button, and 27 is a dial button.
Is a charging terminal, 28 is a rechargeable battery such as a nickel-cadmium battery, 2
Reference numeral 9 is a charge monitoring circuit, and 30 is a control circuit including a microcomputer or the like for controlling the operation of the entire slave unit.

Although this slave unit is equipped with not only the illustrated dial button 9 but also various other function buttons and switches, these are omitted because they are not directly related to the present invention.

The child device of FIG. 3 is placed on the parent device of FIG. 2 when the telephone is not used, and the charging terminal 11 of the parent device and the charging terminal 27 of the child device are electrically connected. The battery 28 of the child device is charged by touching the battery.

The call processing operation in the on-hook mode of the cordless telephone having the above-mentioned configuration will be described with reference to the flowchart of FIG. Now, when the on-hook switch 10 of the base unit is pressed to make a call in the on-hook mode, the control circuit 14 detects this (step S1), controls the call circuit 3 to connect the monitor speaker 2, and receives the speaker. The state is set (step S2). Further, the line control circuit 5 is controlled to control the outside line terminal L.
Close between ₁ and L ₂ and set to the outside line transmission state. When the outside line is supplemented and the line is closed, the monitor speaker 2 emits a dial tone indicating that the outside line is connected, and notifies that the dial reception is ready (step S3).

Next, the control circuit 14 controls the radio transmitter / receiver 6 and the modem 8 and follows the control procedure of FIG.
A wireless path blocking process is performed by the MCA with the child device (FIG. 3) (step S4). Then, when the process of blocking the wireless path between the master and the slave is completed (step S5), the wireless path is held so as not to be disconnected (step S).
8). Further, in parallel with this wireless path blocking processing, dial transmission processing (steps S6 and S7) is performed, and when the dial is operated, the operated dial signal is sent to the outside line.

When the radio path between the master unit and the slave unit is closed to form the communication path between the master unit and the slave unit (step S8), the control circuit 14 further executes the dial transmission process (step S10). , S11), and monitors whether or not the other party has been called and the handset has been lifted (step S9).

When the other party is connected to the telephone and the other party picks up the handset and responds, this voice is output from the monitor speaker 2. Therefore, when the child device is lifted to talk to the other party, the charge monitoring circuit 12 detects that the child device is lifted from the change in the charging state (step S9), and the control circuit 1
Notify 4.

The control circuit 14 controls the call circuit 3 to disconnect the reception by the monitor speaker 2 (step S12), and connects the outside line to the slave unit side via the wireless path (step S13). Since the wireless path between the master unit and the slave unit is already blocked, a speech path is formed between the master unit and the slave unit at the same time when the slave unit is lifted, and it is possible to immediately speak to the other party.

Next, the detailed control procedure for the process of blocking the wireless path by the MCA between the master unit and the slave unit shown in step S4 in FIG. 1 will be described with reference to FIG.

When the telephone is not used, the wireless transmitter / receiver unit 6 of the master unit and the wireless transmitter / receiver unit 21 of the slave unit respectively stand by on the control channel. When the on-hook switch 10 of the parent device is pressed, the wireless transmission unit 6 of the parent device switches from the standby state to the calling state, and the MCA wireless path blocking process described below is started.

That is, the control circuit 14 of the master unit controls the wireless transmission / reception unit 6 to shift from the control channel to the call channel, and scans the PLL of the RF module (not shown) built in the wireless transmission / reception unit 6. Perform MCA to find a free call channel. When an idle call channel is detected, the PLL is returned to the control channel again, carrier sensing is performed to confirm that the control channel is not being used, and then the call from the modem 8 to the handset side is issued via the control channel with the call channel specified. Send a request signal.

Upon receiving the call request signal from the master unit, the slave unit side wireless communication unit 21 waiting on the control channel sends the call request signal to the control circuit 30 through the modem 23. The control circuit 30 decodes the call request signal and reads the designated communication channel number and the like. Then, after transmitting a call response (ACK) signal from the modem 23 to the master side through the control channel, the wireless transmission / reception unit 21 is set to the communication channel at the designated number position.

When the master unit receives the call response (ACK) signal from the slave unit, it sets the wireless transmission / reception unit 6 to the call channel of the designated number position, carries out carrier sense of the call channel, and uses the designated call channel. After confirming that the call is not made, the call request signal is sent again through the call channel.

Upon receiving the call request signal from the base unit transmitted through the call channel, the handset unit again sends a call response (ACK) signal to the base unit through the call channel. As a result, the master unit and the slave unit are connected by a wireless path made up of a designated communication channel, and thereafter, a connection is established so that communication is possible at any time.

[0029]

As described above, when the cordless telephone of the present invention is used, the wireless path between the master unit and the slave unit is closed when the on-hook switch is pressed. Immediately after being lifted, a call can be made immediately without causing dead time, and the usability of this type of cordless telephone can be improved.

[Brief description of drawings]

FIG. 1 is a flowchart of a call processing operation in an on-hook mode according to an embodiment.

FIG. 2 is a block diagram of a base unit of a cordless telephone according to an embodiment of the present invention.

FIG. 3 is a block diagram of a cordless phone handset according to an embodiment of the present invention.

FIG. 4 is a diagram showing a connection procedure of a wireless path blocking process by an MCA between a master unit and a slave unit.

FIG. 5 is a basic configuration diagram of a cordless telephone.

[Explanation of symbols]

 2 monitor speaker 3 communication circuit 5 line control circuit 6 wireless transmission / reception section 8 modem 9 dial button 10 on-hook switch 14 control circuit 21 wireless transmission / reception section 23 modem 24 microphone 25 receiver 26 dial button 30 control circuit

Claims (1)

[Claims] 1. In a cordless telephone in which a base unit and a handset can communicate by blocking a wireless path, a dial operation unit provided in the base unit and an on-hook mode capable of dialing while receiving a call through a monitor speaker are set. An on-hook switch for switching, an on-hook detecting means for detecting an operation of the on-hook switch, and a wireless path closing means for closing a wireless path between a master unit and a slave unit based on a detection output of the on-hook detecting unit. Characteristic cordless telephone.