Abstract: A system selection mode resetting function is newly added as a system selection mode to a mobile communication terminal apparatus having a plurality of system selection modes assigned different priorities. A system selection mode setting unit checks a system selection mode stored in the first memory in response to power-off or subsequent power-on. If the determination result reveals the presence of another mode higher in priority than the mode stored in the first memory, the mode stored in the first memory is reset to the higher-priority mode.

Abstract: In a first standby state, the reception quality of a signal from a system which has established synchronization is detected. If the detected reception quality deteriorates to be less than a threshold value, the destination of synchronization establishment is changed from a first system to a second system. In a second standby state after this system change, the reception quality of a system having a higher priority order of selection than the second system which has established synchronization is detected. If a third system whose detected reception quality exceeds the threshold value is found, the destination of synchronization establishment is changed to this third system again. After that, the first standby state is returned.

Abstract: A communication apparatus having a memory configured to store service information relating to the communication apparatus. The service information may include, for example, identification information that generally or uniquely identifies the communication apparatus, information relating to software employed by the communication apparatus, or a combination of the two. The communication apparatus also includes a retrieval unit that retrieves service information from the memory, and provides the retrieved service information to a designated recipient. For example, the retrieval unit may display the retrieved service information to a person using the communication apparatus. Alternately, the retrieval unit may transmit the retrieved service information to another party, such as the service provider for the communication apparatus.

Abstract: The retrieval unit 1101 retrieves service information including a type of a cellular phone, ESN and a software version from the memory 109. The retrieval unit 1101 converts the service information into formatted data to be transmitted by Short Message Service (SMS). Then the retrieval unit 1101 transmits the converted data to a communication party.

Abstract: There is provided a mobile radio communication apparatus being able to transmit data and voice, connected with one of base stations over a radio communication channel, the apparatus comprising a plurality of mobile identification numbers (MINs), an interface being able to connected with an external device inputting data from the external device and outputting data to the external device, data communication request detecting means for detecting a data communication request from the external device through the interface, and connection control means for controlling the connection with the base station by using a first MIN of the plurality of MINs responsive to output of the detecting means. In the mobile radio communication apparatus having the above constitutions, the data communication request detecting means detects a data communication request from the external device.

Abstract: A mobile communication apparatus is offered which can arbitrarily change a base station to be connected preferentially either by the base station or by a user. Then, the apparatus can be connected with the base station. This mobile communication apparatus has a memory in which priority information is stored. An identification number is stored for each different location area. A base station to which priority is given is captured from the identification number. A control portion carries out this operation. A request signal for causing a certain request to be executed by the mobile communication apparatus is included in the control signal transmitted from the base station. This request signal requests the apparatus to search a specific base station. It is also possible that a user voluntarily selects a specific base station. The apparatus is connected with this base station.

Abstract: This invention provides a dual-mode radio communication apparatus which can make normal communications even when an external apparatus is connected to a radio communication apparatus, the communication scheme of which is set in a digital mode. When the radio communication apparatus is not connected to a vehicle-mount kit via a connector in an analog mode, a switch control means of a controller switches a switching circuit to communicate a signal with a base station using a built-in antenna. When the apparatus is connected to the vehicle-mount kit, the switch control means switches the switching circuit to communicate a signal with the base station using an external antenna via the vehicle-mount kit and a booster unit. In the digital mode, the switch control means switches the switching circuit to communicate a signal with the base station using the built-in antenna independently of the connection with the vehicle-mount kit.

Abstract: In a radio communication apparatus, band-pass filters are provided in correspondence with a multiple-band receiver, a multiple-band transmitter and a GPS receiver, respectively. As radio frequency signals received by an external antenna on a vehicle-mounted adapter is inputted to the radio communication apparatus through the external connection terminal 22, signals in necessary frequency bands are passed by the band-pass filters so as to be inputted to the multiple-band receiver and the GPS receiver, respectively. This makes it possible for the connection terminal to be shared in radio communication by a cellular phone and in GPS reception with reception quality kept high both in the radio communication and the GPS reception to allow the number of external connection terminals to be reduced for providing further downsized and lightweight radio communication apparatus.

Abstract: According to the present invention, an analog-mode discharge characteristic storage area (21a) and a digital-mode discharge characteristic storage area (21b) store threshold data of remaining battery display in an incoming-call standby status in an analog mode and that in a digital mode, respectively. A remaining battery determination means (20a) determines a remaining battery level corresponding to a selected communication mode based on both a voltage of detected by a voltage detection circuit (32) and data stored in the analog-mode discharge characteristic storage area (21a) or the digital-mode discharge characteristic storage area (21b). A remaining battery display control means (20b) causes the remaining battery to be displayed on an LCD display of a control unit (22) in accordance with a determination result of the remaining battery determination means (20a).

Abstract: A mobile radio communication apparatus according to an embodiment of the invention has a memory. The memory stores geographical information items about geographical areas, types of service, and telephone numbers corresponding to the types of service available in each geographical area. When the apparatus is connected to a base station, the geographical information item about the geographical area in which this base station is operating is identified. The user may input service-type information into the apparatus. The service-type information concerns the type of service, which the user wishes to receive. The telephone number which corresponds to the geographical information item identified and the service-type information is retrieved from the memory. The telephone number is transmitted to the base station, whereby the mobile radio communication apparatus can make a call origination to the service center that offer the service the user wants.

Abstract: Disclosed herein is a mobile radio communication apparatus, wherein priority data items representing the priorities of base stations are stored. The SID of the base station seized when the apparatus was turned off last is stored in the apparatus, too. When the apparatus is turned on, it may identify a base station of higher priority than the base station it seized when it was turned off. In this case, the apparatus seizes the base station of higher priority and goes into an idle state. Thus, the apparatus that can seize a base station of high priority even if it seized a base station of low priority when it was turned off last and if it now exits in an area formed by the overlapping of the two service areas in which the low-priority base station and the high-priority base station operate, respectively.

Abstract: A communication terminal according to the present invention is configured so that a user can selectively set any one of a first display mode for displaying a CLI message with high priority, a second display mode for displaying a phone book storage information with high priority, and a third display mode for displaying both of the CLI message and phone book storage information. When an incoming call takes place, it is determined whether or not any one of the first, second, and third modes is set. According to the determination result, the caller name notified by the CLI message and the user name stored in the phone book are selectively displayed.

Abstract: There is provided a mobile radio communication apparatus being able to transmit data and voice, connected with one of base stations over a radio communication channel, the apparatus comprising a plurality of mobile identification numbers (MINs), an interface being able to connected with an external device inputting data from the external device and outputting data to the external device, data communication request detecting means for detecting a data communication request from the external device through the interface, and connection control means for controlling the connection with the base station by using a first MIN of the plurality of MINs responsive to output of the detecting means.

Abstract: Disclosed herein is a mobile radio communication apparatus that includes a memory. The memory stores, for each area in which base stations (BSs) are operating, SID, priority data items representing priorities assigned to BSs, and information representing types of service. The contents of the memory are referred to, thereby to determine whether a BS seized is offering the type of service the user has requested. If the BS seized is one that does not offer the desired type of service, one of the other BSs offering the desired type of service in the area in which the BS seized is operating is seized in accordance with the priority data items. Thus, the apparatus can seize a BS offering service the user wants to utilize, even if it has already seized another BS which does not offer this service and has therefore come into an idle state.

Abstract: When a predetermined instruction is input by a user through a key input section, a microprocessor detects the input of the predetermined instruction. The microprocessor then renders personal digital assistant (PDA) functions available, turns off an RF switch, and stops power supply to a transmission system of an RF section. Further, the microprocessor controls an LED and/or a sounder to indicate that radio waves are not sent out to the outside.

Abstract: A mobile radio communication apparatus having a communication function adaptable to both an analog mode and a digital mode is controlled by a control unit, when it receives from a radio base station a message signal representing that the digital mode is provided. When the strength of the message signal in the analog mode received by a receiving unit from the radio base station is at a predetermined level or higher, a mode of communication services is shifted into the digital mode. When the strength is lower than the predetermined level, the standby status in the analog mode is maintained. Therefore, the mode of communication services is not alternated between the analog mode and the digital mode, with the result that both an outgoing call and an incoming call can be performed successfully even in an unstable service area where a transmitted signal cannot reach the radio base station.

Abstract: The present invention provides a cheap handsfree unit which can prevent the howling phenomenon and reduce the input sound from the loud-speaker into the microphone in both the analog and digital modes. A reception side comprises a signal level adjusting circuit constituted by a switch circuit and attenuators, and a transmission side comprises a signal level adjusting circuit constituted by a switch circuit and attenuators, to introduce the attenuation of 15 dB or 30 dB in response to the analog or digital mode. A voice switch is constituted so that the analog reception signal and the analog transmission signal are rectified respectively by rectifiers, the levels of both signals are compared by a comparator, and either switch or switch having a higher input signal level becomes conductive as a result of the comparison. The attenuation is introduced on the basis of the communication mode, only to either the analog reception signal or analog transmission signal having a smaller signal intensity.

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: In a radio telephone equipment which includes a portable radiotelephone (100) and a booster (400), an output from the portable radiotelephone (100) whose output level is set according to a level control signal transmitted from a base station is amplified with a preset amplification factor by an automatic gain control circuit (22) provided in the booster (400). As a result, since the amplification factor of the amplifier in the booster and the portable radiotelephone are independently controlled, the booster can be connected to even a portable radiotelephone which is designed without considering that it will be connected to the booster.

Abstract: A radio communication apparatus such as an automobile telephone apparatus capable of accurately displaying a reception field strength. Also disclosed is a method of setting a threshold value for displaying a reception field strength of the radio communication apparatus. A storage device for storing correction data for the reception field strength corresponding to a mode of usage of the radio communication apparatus is provided. At the time when information on the reception field strength is supplied to a user, the reception field strength is corrected on the basis of correction data stored in the storage device to effect the notification. A radio signal of a predetermined strength corresponding to a reference value is generated from the outside, the radio signal generated is received, the reception field strength of the radio signal received is detected, and the value of the reception field strength detected is stored in a storage device as data on the threshold value.