Kabushiki Kaisha Toshiba

Tokyo Shibaura Denki Kabushiki Kaisha

Toshiba Corporation

Kuniyoshi Marui

Buntaro Sawa

Takaaki Ishii

Kiyoshi Hattori

Goichi Sato

Hiroshi Sato

Shinya Takahashi

Akira Ishikura

Tatsuaki Sekigawa

Akio Gotoh

Shinji Takachi

Naoto Honda

Syuitsu Tsutsumi

Hiroshi Yasuda

Koichi Ito

Kazuhiro Kawashima

Kaoru Tatsumi

Tsutomu Inaba

Katsumi Shitara

Jun Kuno

Takao Kishida

During the CDPD mode period, RSSI data and battery remaining capacity determination data measured by a hand held phone HHP are periodically transferred to a personal computer PC, and are displayed on an LCD display of the personal computer PC. During the CDPD mode period, status data representing the operation state of the personal computer PC is transferred to and displayed on the hand held phone HHP. Furthermore, during the CSCD mode period, status data representing the operation state of the hand held phone HHP is transferred to the personal computer PC, and is displayed on the LCD display of the personal computer PC.

Mobile communication terminal apparatus with data communication function

Mobile radio communication system and fixed and mobile units used

During the CDPD mode period, RSSI data and battery capacity remaining determination data measured by a hand held phone HHP are periodically transferred to a personal computer PC, and are displayed on an LCD display of the personal computer PC. During the CDPD mode period, status data representing the operation state of the personal computer PC is transferred to and displayed on the hand held phone HHP. Furthermore, during the CSCD mode period, status data representing the operation state of the hand held phone HHP is transferred to the personal computer PC, and is displayed on the LCD display of the personal computer PC.

An adapter unit for a portable radio telephone is disclosed. The adapter unit is selectively used for either one of the data transmission and the hand-free operation in response to a control signal from the portable radio telephone. The signal paths for the data transmission and the hand-free operation may be established in the adapter unit when the portable radio telephone is attached to the adapter unit. The adapter unit may be activated upon a connection of the portable radio telephone and the adapter unit.

Adapter unit for a portable radio telephone enabling either one of data

The cellular mobile telephone apparatus comprises a radio unit having an antenna which is connected to a base station provided in a cell via a radio channel, and a telephone unit which is connected to the radio unit via a line and is formed of a main unit and handset. A plurality of cells form a service area and the base stations included in the service area are connected to a mobile telephone switching office via lines. A system identification number representing the service area and a mobile identification number identifying the telephone apparatus within the service area are assigned to a user by a mobile telephone company. The telephone apparatus comprises a key-input section for inputting the identification numbers and an electrically erasable programmable ROM for storing the identification numbers input by the key-input section.

Radio telecommunication apparatus

An adapter unit for adaptively supplying a portable radio unit with electric power is disclosed. When the portable radio unit being not powered by a rechargeable battery attached thereto or being not in a communication state is connected to the adapter unit, the first power supply circuit of the adapter unit supplies the rechargeable battery or the portable radio unit with power. When the portable radio unit being in the communication state is connected to the adapter unit, the second power supply circuit of the adapter unit supplies the portable radio unit through the rechargeable battery with power. Power supply capacity of the second power supply circuit is larger than that of the first power supply circuit.

Adapter unit for adaptively supplying a portable radio telephone with

A radio telecommunication apparatus includes a storage for storing a system identification data of a system to which the apparatus belongs to and provides an indication relating to where the apparatus is present on the basis of a result of a comparison between the system identification data stored in the storage and a system identification data received through a control channel which is established immediately before a speech communication link is established. According to the present invention, even if the user's apparatus moves, at the time of calling, from the home area to the roam area or from the roam area to the home area, the area confirmation data corresponding to the current position of the apparatus is accurately displayed.

Radio telephone apparatus having a service area confirmation

An apparatus stores a plurality of mobile identification numbers. When a user selects at least one of the stored mobile identification number and the apparatus receives a mobile identification number transmitted from a base unit, the received mobile identification number is compared to each selected mobile identification number. When the user does not select any of the stored mobile identification numbers and the apparatus receives a mobile identification number transmitted from the base unit, the received mobile identification number is compared to each of the stored mobile identification numbers. When the received mobile identification number coincides with one of the selected mobile identification number or one of the stored mobile identification numbers, the apparatus is enabled to communicate with the base unit.

A portable radio unit used with an adaptor unit having a hand-free circuit is disclosed. The hand-free circuit is activated in response to a contact between a contact-type connector of the portable radio unit and a contact-type connector of the adaptor unit in the event that the portable radio unit being in a communication state is attached to the adapter unit. Power supply to the hand-free circuit is also initiated in response to the contact of the connectors.

Portable radio telephone used with an adaptor unit having a hand-free

A voice recognition system comprises a handset and a hands-free microphone for generating an input audio signal, a high-pass filter for eliminating low frequency components from the signal from the handset or hands-free microphone, a signal level controller for adjusting the level of the high-pass signal in response to the user of either the handset or hands-free microphone, a storer for storing the speech data and a controller for controlling the storer so that a user's utterance is stored or the user's utterance is recognized by comparing the utterance to speech data already stored. The handset hook switch provides an on-hook control signal to reduce amplifier gain during hands-free microphone operation.

Voice recognition system used in telephone apparatus

Radio telephone apparatus for use in a cellular mobile telephone system includes an alarm to inform a user of a drop in signal strength of radio frequency signals received over an established communication link. Such a drop occurs, for example, when the user is approaching the boundary of a service area. Further, the mobile unit detect the presence or strength of a tone signal modulated on at least one of the received radio signals. The mobile unit disconnects the telephone link and returns to the standby mode if the tone signal is lost or becomes too weak.

Radio telephone apparatus

Radio telecommunication apparatus which includes storing a plurality of identification numbers of the apparatus. Each identification number of the apparatus is stored with an associated system identification number. Responsive to a system identification number transmitted from a base unit an identification number of the apparatus corresponding to the system identification number is selected. The selected identification number is broadcast over a radio channel. Still the apparatus receives all incoming calls having an identification number which is the same as one of the stored identification numbers.

A radio telecommunication apparatus comprises a control for controlling a power supply so that power is supplied to a modulator in response to a request to transmit signals. Furthermore signals to be transmitted are not applied to the modulator until the modulator has been locked to an appropriate frequency. Also, an amplifier for amplifying an output signal of the modulator is not supplied power until the modulator has been substantially locked to an appropriate frequency.

A radio telephone apparatus comprises detecting means for detecting a predetermined signal sequence other than a signal sequence associated with address signaling or an incoming call indicator signal and means for indicating that a call is received in response to the detection of the predetermined signal sequence. A user of the apparatus may prestore identification numbers of parties from whom the user wishes to receive calls. Also, by means of a transmitted password and a comparison of the password upon receipt with a prestored password, incoming calls will be received.

Radio telephone apparatus for use in a cellular mobile telephone system comprises means for alarming at least a user operating the apparatus in response to a drop in signal strength of radio frequency signals received over an established communication channel when the apparatus approaches a boundary of service area in a cellular mobile telephone system. The signal strength is repetitively checked to determine if it has fallen below a first predetermined signal strength value. When the signal strength falls to or below a second predetermined signal strength value, the radio telephone apparatus causes a disconnection of the telephone link and returns the apparatus to a standby mode.

Growing community of inventors

Saitama, Japan

Kuniyoshi Marui