Abstract: 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.

Abstract: In a mobile communication system of the present invention, a cordless base unit LBU is connected to a wired subscriber line SL. The base unit LBU detects a radio channel assigned to a cell other than a cell where the base unit LBU is located, among radio channels assigned to the cells of a cellular radio communication system. This radio channel is used as a radio channel for a cordless call. On the other hand, a cellular cordless telephone CCT is provided with a mode switch. When a cordless mode is designated by the mode switch, a radio channel for a cordless call is detected, as with the case of the base unit LBU. At the time of the cordless call, a transmission power level of the cellular cordless telephone CCT is set at a weak level smaller than that for a cellular call.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A voice recognizing telephone apparatus in which the telephone apparatus recognizes a speech input and stores the telephone numbers that correspond to the speech input. When the user makes an outgoing call to another telephone apparatus by speaking the telephone number corresponding to the other telephone apparatus, the telephone number is read out from stored telephone numbers and then is dialed. The stored telephone numbers can be erased entirely or partially. During operations of storing a telephone number into the memory, the voice recognizing telephone apparatus cannot make an outgoing call or receive an incoming call.

Abstract: A radio telephone apparatus having a voice recognition function. A voice dial mode may be set for a predetermined time period in response to the actuation of a switch, whereby address data corresponding to an operator's utterances within a predetermined time period after the switch is actuated may be broadcast to a base station over a radio channel. The operator may confirm the address data to be broadcast by checking one or more indications which are visually or acoustically provided before the address data is broadcast.

Abstract: A car telephone equipment having an automatic calling function which can automatically call a destination party after passage of a specified time period or at a predetermined time. A telephone number of the party is stored in a dial number memory, a desired time period is set at a timer or a desired time is stored in a time register, so that a radio communication circuit is established between the telephone equipment and a base station to perform an automatic calling operation over the destination party telephone number stored in the dial number memory at the moment when the timer times out or when a time of a clock coincides with the time stored in the time register.

Abstract: The present invention is directed to a method and system which is automatically responsive to transmitted DTMF signals containing messages received from, and corresponding to respective calling originators. The invention provides an indication to the user of message storages areas which are used or available. If all message storages are full, an alarm function is provided. The system also provides an automatic dial capability wherein the number dialed is retained in memory only if the call is not completed.

Abstract: What is disclosed is a system for recovering encoded data from a transmitted signal. A clock regenerating circuit regenerates a clock signal from the data bits encoded in the signal. The regenerated clock signal is used to synchronize an up/down with each individual data bit. When a data bit is at a logic "H", the counter counts from a predetermined value in an upward direction and when the data bit is at a logic "L", the counter counts in a downward direction from a predetermined value. The count after each bit-time is used to provide a signal representative of the logic state of that data bit. Accordingly, a reproduced data signal can be accurately obtained.