JPH04351127A - Radio telephone system - Google Patents

Abstract

PURPOSE:To exclude trouble in mode switching by selecting the communication mode automatically in a telephone system having the cordless telephone mode and the portable telephone mode. CONSTITUTION:The telephone system is provided with an automatically communication mode switching section 9, a registration number and a call requesting signal for a portable telephone set are sent in the cordless telephone mode set automatically at the start of talking, and when the registration number as the portable telephone set and a call enable signal are received from an opposite party receiving them, the talking mode is unchanged and when no signal is received, the automatically communication mode switching section 9 selects the portable telephone mode.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio telephone device having both a cordless telephone mode and a mobile telephone mode.

0002

2. Description of the Related Art In recent years, wireless telephone devices have rapidly come into use. However, call charges for mobile phone devices are extremely high.

[0003] A conventional radio telephone device will be explained below with reference to the drawings.

FIG. 3 is a block diagram of a conventional radio telephone device, in which 1 is a radio section that modulates and demodulates radio signals, 2 is a microphone section, 3 is a speaker section, and 4 is a section for transmitting audio signals and equipment control data signals. 5 is a cordless phone signal detection unit that detects whether communication is possible with the base unit of the cordless phone; 6 is a display unit; 7 is a key input unit; 8 is a mobile phone mode or a cordless phone mode A communication mode changeover switch 10 is a control unit that controls the entire wireless telephone device.

The conventional radio telephone device is constructed as described above, and its operation will be described below when making a call. When an operator who has determined that a call can be made in the cordless telephone mode makes a call, he or she manually sets the communication mode changeover switch 8 to the cordless telephone mode.

[0006] Thereby, the cordless telephone signal detection unit 5 detects whether or not it is possible to make a call to the base unit of the registered cordless telephone, and the display unit 6 indicates whether or not the call is possible via the control unit 10.
If the display indicates that it is possible to make a call in the cordless telephone mode, the operator continues to make a call using the key input section 7.

[0007] Furthermore, when it is not possible to make a call in the cordless telephone mode, the communication mode selector switch 8 is manually switched to the mobile phone mode, and the call operation is performed in the mobile phone mode.

[0008]

[Problem to be Solved by the Invention] However, the above-mentioned conventional wireless telephone device has the trouble of having to confirm whether or not it is possible to talk to the base unit of the cordless telephone every time a call is made. At the same time, in an area where calls can be made in cordless phone mode, if you forget to switch and leave the communication mode selector switch 8 in mobile phone mode,
There is a problem in that when you make a call or make a call, you have to pay a high call fee.

The present invention solves the above-mentioned problems, and determines whether or not connection to a cordless telephone is possible when making a call, and automatically switches the wireless telephone device to cordless telephone mode if it is possible to make a call in cordless telephone mode. The purpose of the present invention is to provide a wireless telephone device that enables telephone calls using a cordless telephone with low call charges.

0010

[Means for Solving the Problems] The present invention provides a wireless telephone device having both functions of a mobile telephone mode and a cordless telephone mode, which is equipped with an automatic communication mode switching unit that automatically switches to the cordless telephone mode at the beginning of a call. At the start, the mobile phone registration number and call request signal are sent to the base unit of the cordless phone in cordless phone mode, and within a certain period of time after the transmission, the base unit transmits the received mobile phone registration number and call request signal. If a call permission signal is received, the call is made using the current cordless telephone mode, and if the registration number as a mobile phone and the call permission signal cannot be received from the base unit within a certain period of time, the above
The present invention is characterized in that a communication mode automatic switching section automatically switches a mobile phone mode to make a call.

[0011]

According to the present invention, the troublesome operation when making a call is eliminated, and it is possible to reliably make an inexpensive call in an area where the cordless telephone mode can be used.

0012

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram of a wireless telephone device according to an embodiment of the present invention. In Figure 1, 1 to 7
, and 10 have the same functions as those in FIG. 3, and the other reference numeral 9 is a communication mode automatic switching unit that automatically switches communication modes.

FIG. 2 is a flowchart showing a communication procedure between the wireless telephone device and the base unit of the cordless telephone when the wireless telephone device makes a call in one embodiment of the present invention.

FIG. 2 shows a case where a call is made in the mobile phone mode using the wireless telephone device of the present invention configured as described above.
The operation will be explained below according to the flowchart.

First, when the operator starts a call operation, the wireless telephone device is set to the cordless telephone mode by the control section 10 and the communication mode automatic switching section 9 (S1), and a conversation with the base unit of the cordless telephone is started. That is, the wireless telephone device continues to transmit the registration number as a mobile telephone device and a call request signal to the base unit of the cordless telephone (S2). The base unit of the cordless telephone detects and confirms the received registration number as a mobile phone device and the call request signal (S3), seizes the telephone line, and transmits the registration number and call permission signal to the wireless phone device. (S4).

After transmitting the registration number and call request signal in S2, the wireless telephone device waits for a predetermined period of time (T
1), the cordless telephone signal detection unit 5 receives the registration number and call permission signal transmitted from the cordless telephone base unit.
is detected (S5), based on the detection output, the control section 10 determines that it is possible to make a call in the cordless telephone mode, and the communication mode automatic switching section 9 keeps the wireless telephone device fixed in the cordless telephone mode. (S6) The dial signal of the other party is transmitted to the base unit of the cordless telephone. After that, the call operation becomes normal using a cordless phone.

[0017] Here, the registration number of the wireless telephone device as a mobile phone when the call is started and the fixed time (T1) after the start of sending the call request signal define the detection time of the base unit of the cordless telephone. Yes, and if this time is not specified, the wireless telephone device will continue to transmit the registration number and call request signal forever. If a certain period of time (T1)
If the cordless telephone signal detection unit 5 cannot detect the registration number and call permission signal from the base unit of the cordless telephone within the period of time, the detection output indicates that it is impossible to make a call with the base unit of the cordless telephone. The communication mode automatic switching unit 9 switches to the mobile phone mode, and a call is made in the mobile phone mode.

[0018] Here, the base unit of the cordless telephone detects that the registration number, the call request signal, and the radio signal sent by the radio telephone device in the cordless telephone mode are interrupted, and transmits the registration number to the radio telephone device. and stop sending the call permission signal. Further, the control section 10 causes the display section 6 to display whether the wireless telephone device is operating in a cordless telephone mode or a mobile telephone mode. In this way, when making a call, the operator can make a call by telephone without having to judge whether the call should be made in the cordless telephone mode or the mobile telephone mode, and without making any settings.

[0019]

Effects of the Invention As explained above, the wireless telephone device of the present invention is equipped with a communication mode automatic switching section and is operated by the detection output of the cordless telephone signal detection section, so that when making a call, a cordless telephone is used. A wireless telephone that automatically selects communication in cordless telephone mode when possible, eliminating the hassle of operation, and eliminating the use of mobile telephone mode in areas where cordless telephone mode can be used. equipment can be provided.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a wireless telephone device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a communication procedure with a cordless telephone base unit when making a call in FIG. 1;

FIG. 3 is a block diagram of a conventional wireless telephone device.

[Explanation of symbols]

1... Radio section, 2... Microphone section, 3... Speaker section,
4...Data/audio processing unit, 5...Cordless telephone signal detection unit, 6...Display unit, 7...Key input unit, 8
...Communication mode changeover switch, 9.Communication mode automatic switching section, 10.Control section.

Claims (1)

[Claims] 1. A wireless telephone device having both functions of a mobile phone mode and a cordless telephone mode, comprising an automatic communication mode switching unit that automatically switches to the cordless telephone mode at the beginning of a call, and a communication mode automatic switching section that automatically switches the mobile phone mode to the cordless telephone mode at the beginning of a call. If the registration number as a mobile phone and a call request signal are sent to the base unit of the cordless telephone, and the registration number as a mobile phone and a call permission signal are received from the base unit within a certain period of time from the sending, , make a call using the current cordless phone mode, and if the registration number and call permission signal for the mobile phone cannot be received from the above-mentioned base unit within a certain period of time, the above-mentioned communication mode automatic switching section automatically switches the mobile phone mode. A wireless telephone device characterized by making a call in a telephone mode.