JP3223148B2 - Cordless telephone equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cordless telephone device comprising a master unit and a slave unit.

[0002]

2. Description of the Related Art Conventionally, in a cordless telephone apparatus comprising a master unit and a slave unit, an end signal is transmitted from the slave unit at the end of the call, and the master unit releases the telephone line by receiving the end signal. Like that.

By the way, as a control method at the end of the call,
It is conceivable to return the slave to the reception standby state after waiting for a response signal from the master in response to the end signal.However, in this case, if the slave cannot receive the response signal, It is a matter of setting. Therefore, normally, the end signal is repeatedly transmitted about four times so that the master unit can reliably receive the end signal, and immediately after the end signal is transmitted, the slave unit is immediately returned to the reception standby state.

On the other hand, in recent years, in a cordless telephone device, at the end of a call, data such as a call charge and a call time are transmitted from a master unit, and the call unit and the call time are displayed on a slave unit.

[0005]

In such a cordless telephone device, when performing the above-described call termination control method, the child device receives data such as a call charge from the parent device while transmitting the call termination signal. May be. In this case, the control circuit of the slave unit normally does not perform data processing such as a call charge unless the end signal is transmitted a predetermined number of times due to its processing capability. The power for the operation time of the slave unit during the delay is wasted.

[0006]

SUMMARY OF THE INVENTION In view of the foregoing, a cordless telephone device according to the present invention comprises a master unit connected to a telephone line and a slave unit wirelessly connected to the master unit. In the cordless telephone device, the slave unit repeatedly transmits an end signal a predetermined number of times at the end of a call, wherein the slave unit includes:
When receiving the data signal from the master unit while transmitting the end signal, the transmission is stopped even if the end signal is not repeatedly transmitted a predetermined number of times.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the accompanying drawings, taking a cordless telephone apparatus including a base unit (1) and a handset (2) wirelessly connected to the base unit as an example. FIG. 1 is a block diagram showing a configuration of a main part of the master unit (1), and FIG. 2 is a block diagram showing a configuration of a main part of the slave unit (2).

First, the configuration of the main part of the master unit (1) will be described. In FIG. 1, reference numeral 11 denotes an incoming call detection circuit which is connected to the telephone line (L) and which shapes the incoming signal into a pulse signal and outputs it. Reference numeral (12) denotes a caller number detecting circuit, which detects the telephone number (caller number) of the caller from a telephone station via a telephone line. The telephone number to be detected includes an area code, a local code, and a subscriber number, and always includes the area code. (13) is a network circuit, which is connected to a telephone line and releases and closes the line. (14) is a dial transmission circuit for transmitting a dial number designated by a control circuit (23) described later.

(15) is a handset, which has a speaker (16) and a microphone (17). (1
8) is a receiving circuit, which receives a signal from the slave unit (2) via the antenna (19). A transmission circuit (20) transmits an output signal of the network circuit (14) to the slave unit (2) via the antenna (19). (21) is P
LL circuit, receiving circuit (18) and transmitting circuit (20)
Change the transmission / reception frequency.

A switching circuit (22) switches the connection to the network circuit (13) to the handset (15) side or the reception circuit (18) / transmission circuit (20) side.

Reference numeral (23) denotes a control circuit composed of a microprocessor, and a ROM (2) storing an operation program.
Each part is controlled based on 4). The ROM (24) also stores a program that allows the control circuit (23) to measure the call time and calculate the call charge. (25) is a RAM for storing information necessary for the operation of the control circuit (23).

(26) is a bell, which outputs a ringing tone when an incoming call is received. (27) is a liquid crystal display means capable of switching between green and red backlights, and displays telephone numbers and the like. (28) is an input means, which has a ten-key (281) for inputting a telephone number and a selection key (282) for selecting whether or not to display a call time and a call charge. (2
9) is a switch for detecting on-hook and off-hook of the handset (15).

Next, the configuration of the main part of the slave unit (2) will be described.
In FIG. 2, reference numeral (31) denotes a receiving circuit, which receives a signal from the master unit (1) via an antenna (32).
(33) is a transmission circuit which converts an input signal to an antenna (3)
The call is transmitted to the master unit (1) via 2). (34) is PLL
A transmission / reception frequency of the reception circuit (31) and the transmission circuit (33).

A speaker (35) is an amplifying circuit (3).
The electric signal of the receiving circuit (31) amplified in 6) is converted into sound. (37) is a microphone, which converts a sound into an electric signal. An amplifier circuit (38) amplifies the output of the microphone (37) and outputs the amplified output to the transmission circuit (33).

Reference numeral (39) denotes a control circuit composed of a microprocessor, and a ROM (4) storing an operation program.
Each part is controlled based on 0). (41) is a RAM for storing information necessary for the operation of the control circuit (39).
(42) is a bell, which outputs a ringing tone upon receiving a call.
(43) is a liquid crystal display means capable of switching between green and red backlights, and displays a telephone number, a call time, a call charge, and the like. Reference numeral (44) denotes input means, which includes a call key (441) for starting a call, an off key (442) for ending a call, and a numeric keypad (443) for inputting a dial number.

FIGS. 3 and 4 are flowcharts of the main part programs in the call mode written in the control circuits (23) and (39) of the master unit (1) and the slave unit (2). The operation will be described based on this.

The telephone line (L) is closed by a call request by operating the call key (441) of the slave unit (2), and the network circuit (13) and the receiving circuit (18) / transmitting circuit (20) are connected. The call mode of the slave unit (2) to be connected. In such a call mode, the off key (44) of the handset (2)
When 2) is operated, the control circuit (39) of the slave unit (2)
Transmits the end signal four times repeatedly (S5, 6,
9). When the control circuit (23) of the master unit (1) receives at least one of the four end signals sent, the control circuit (23) determines whether or not the display mode is set to display the call time and the call charge. A determination is made (S1, 2). This setting can be performed by operating the selection key (282) of the base unit (1) while the handset (15) is on-hook.

If the display mode is not set, the control circuit (23) of the master unit (1) returns to the reception standby state (S2), and the control circuit (39) of the slave unit (2) also sends an end signal. Is transmitted four times, the process returns to the reception standby state (S9).

When the display mode is set, the control circuit (23) of the master unit (1) displays the call time and the call charge on the display means (43), and displays these data on the slave unit (2). (S2, 3). When the slave unit (2) receives the data from the master unit (1) even while the transmission of the end signal is being completed, the slave unit (2) stops transmitting the end signal,
The display means (43) displays the call time and the call charge based on the received data (S7, S8). Both the control circuits (23) and (39) of the parent device (1) and the child device (2)
After displaying for 5 seconds, the display is stopped and the apparatus returns to the reception standby state (S3, 8).

When the control circuit (23) of the master unit (1) determines that the level of the received carrier is equal to or less than the predetermined value for 30 seconds, the control circuit (23) returns to the reception standby state (S4). This is for a countermeasure in a case where the end signal from the slave unit (2) cannot be received even once.

[0021]

As described above, the present invention is constructed as described above, so that the slave unit can display the talk time immediately after receiving data such as the talk time from the master unit.

[Brief description of the drawings]

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

FIG. 2 is a block diagram of a slave unit of the cordless telephone device according to the present invention.

FIG. 3 is a flowchart of a program of a main part of a base unit of the cordless telephone device of the present invention.

FIG. 4 is a flowchart of a program of a main part of a slave unit of the cordless telephone device according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 master unit 2 slave unit 23 control circuit (master unit) 39 control circuit (slave unit)

(56) References JP-A-57-162846 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04B 7/24-7/26 H04M 1/725 H04Q 7 / 00-7/38

Claims (1)

(57) [Claims] 1. A cordless telephone which comprises a master unit connected to a telephone line and a slave unit wirelessly connected to the master unit, wherein the slave unit repeatedly transmits an end signal a predetermined number of times when a call is ended. in the telephone apparatus, said child machine, when sending the completion signal, when receiving the data signal from the master unit, the
A cordless telephone device wherein the transmission is stopped even if the end signal is not repeatedly transmitted a predetermined number of times .