JPH05244088A - Portable telephone terminal - Google Patents

Abstract

PURPOSE:To reduce the telephone rate of a subscriber, to manage a terminal used by the subscriber in one, and to attain space saving and improvement for operability. CONSTITUTION:A portable telephone terminal 1 is provided with transmitter/ receivers 11, 12, and transmission is performed by connecting the terminal to the transmitter/receiver 11 via the master set 2 of a cordless phone when a call is issued, and it is used as the cordless phone when a response is received, and is used as a mobile telephone terminal when no response is received. Also, a monitoring part 14 monitors each frequency of the transmitter/receivers 11, 12, and a switching part 13 performs switching connection so as to respond to even an incoming call from either the transmitter/receivers.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile phone terminal,
In particular, it relates to a mobile phone terminal that can be used as both a cordless phone handset and a cellular mobile phone terminal.

[0002]

2. Description of the Related Art Conventionally, cordless phone handsets and mobile telephone terminals are individual, and mobile telephone terminals can be moved even when a call is made from a place where the user always stays, which is considered to have little merit in mobile communication. Call processing for body communication is being performed.

[0003]

The owner of the above-mentioned conventional mobile telephone terminal is a portable mobile telephone for convenience even if the ordinary telephone is installed and usable in the place where it is resident. You will use the terminal. However, mobile communication uses a dedicated channel for mobile communication, so that there is a drawback that the cost for a call is high, and thus the call charge is high and the burden on the subscriber is heavy.

Further, when the cordless phone and the cellular type mobile telephone terminal are separately used, not only the terminal cost becomes high, but also the installation space becomes large.

[0005]

A portable telephone terminal of the present invention comprises a first transceiver for tuning to a first frequency used in a cordless phone and a second transceiver for using a second frequency assigned by general cellular. Second transceiver, switching means for switching and transmitting the first and second frequencies, the first and second reception radio waves of the first and second transceivers.
And a monitoring means for simultaneously monitoring the second frequency.

[0006] And the first as the cordless phone
And a second telephone number as a mobile telephone terminal, and the switching means uses the first frequency to make a call from the base unit of the cordless phone and does not respond within a predetermined time. In this case, the mobile phone terminal is switched to the second frequency and transmitted as the mobile phone terminal.

When the monitoring means detects an incoming call at the first frequency, the first transceiver and the handset are connected, and when an incoming call at the second frequency is detected, the second transceiver is connected. The transmitter / receiver and the handset are connected to each other.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a mobile phone terminal of the present invention.

In FIG. 1, a mobile telephone terminal 1 has a first telephone number as a cordless phone and a second telephone number as a mobile telephone terminal, and uses the first frequency when used as a cordless telephone. To communicate with the general telephone network via the master unit 2, and when used as a mobile telephone terminal, communicate with the mobile communication network via the cell site 3 using the second frequency assigned by the general cellular unit. To do.

The portable telephone terminal 1 has a transceiver 11 that tunes to a first frequency, a transceiver 12 that uses a second frequency, and a telephone unit 15 when transmitting as a cordless phone handset. When connecting and making a call as a mobile telephone terminal, the telephone unit 15 is used as a transceiver 1
A switching unit 13 for switching and connecting to 2, a transceiver 11,
The monitoring unit 14 constantly monitors the received signals of 12 and instructs the switching unit 13 to switch when the incoming signal is detected.

Next, the operation of this embodiment will be described. When calling from the telephone unit 15, the switching unit 13 causes the transceiver 1
1 to access the general telephone network via the base unit 2 of the cordless phone and wait for the other party's response. If the monitoring unit 14 detects a response signal from the base unit 2 before the built-in timer times out, it does not give a switching instruction to the switching unit 13, so that the mobile phone terminal 1 operates as a cordless phone slave unit. When the timer times out without receiving a response signal from the master unit 2, the monitoring unit 14 instructs the switching unit 13 to access the telephone unit 15 to the transceiver 12,
It operates as a portable mobile phone terminal.

In this embodiment, since mobile communication involves many signal exchanges in a waiting state other than during a call, the mobile telephone terminal 1 is made to stand by as a mobile telephone terminal, and the monitoring section 14 transmits and receives. The incoming signals of the machines 11 and 12 are simultaneously monitored. Therefore, when an incoming call is received from the transceiver 12, that is, the mobile communication side, the incoming call processing is performed as it is as a mobile telephone terminal device, and the cordless phone base unit 2 is informed that a call is being made by mobile communication.

When an incoming call is made as the transceiver 11, that is, a cordless phone, the monitoring unit 14 switches the connection with the telephone unit 15 by the switching unit 13 and connects to the general telephone network by the procedure of the cordless phone. When receiving an incoming call from the mobile communication network via the transceiver 12 during the connection and during the call, the mobile phone terminal 1 is required as a mobile phone terminal for sending out tones and responding when receiving an audit. Various processes are also performed in parallel.

Furthermore, when a call is received from the general telephone network via the transmitter / receiver 11 during connection or during a call as a mobile telephone terminal, the base unit 2 is informed of the busy state of the mobile telephone terminal 1. , Let the caller hear a busy tone from base unit 2. In addition, when the mobile phone terminal 1 is located outside the effective area as a cordless phone and there is an incoming call to the cordless phone, it means that the subscriber is out of the base unit 2.
The second telephone number as the mobile telephone terminal is announced as an announcement.

[0015]

As described above, the present invention can be used as a cordless phone when the base unit of the cordless phone is installed at the place where the mobile phone terminal is located, so that it can be used as a cordless phone. The number of times the mobile communication network is used per number is reduced, and the burden on the subscriber can be reduced.

Further, by combining the cordless phone and the mobile phone terminal, there is an effect that space saving and the operator are improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a mobile phone according to the present invention.

[Explanation of symbols]

 1 Mobile phone terminal 2 Base unit 3 Cell site 11, 12 Transceiver 13 Switching unit 14 Monitoring unit 15 Telephone unit

Claims (3)

[Claims] 1. A first transceiver for tuning to a first frequency used in a cordless phone, a second transceiver for using a second frequency assigned in general cellular, and the first and second A mobile phone terminal, comprising: switching means for switching and transmitting a frequency and monitoring means for simultaneously monitoring the first and second frequencies of the radio waves received by the first and second transceivers. 2. A cordless phone having a first telephone number and a mobile telephone terminal having a second telephone number, and the switching means uses the first frequency from a parent device of the cordless phone. 2. The mobile phone terminal according to claim 1, wherein, when the mobile phone terminal is called and when there is no response within a predetermined time, the frequency is switched to the second frequency and the mobile phone terminal is called. 3. The first transceiver is connected to the handset when the monitoring means detects an incoming call on the first frequency, and the second transceiver is connected when an incoming call on the second frequency is detected. The mobile phone terminal according to claim 1 or 2, wherein the transceiver and the handset are connected to each other.