Abstract: A foldable mobile communication terminal and a calling method thereof, in which calling operation to a telephone number is started from the open state of its cabinet, and the calling operation is executed smoothly by reducing one of processes of the calling operation. Data communication is executed at the open state of its cabinet and voice communication is executed at the closed state of the cabinet, provides an inner side displaying section for displaying data inputted or received at the open state of the cabinet, a calling number input buffer for storing data of a telephone number displayed on the inner side displaying section, and a voice communication changing-over section for changing-over from the data communication to the voice communication to the telephone number storing in the calling number input buffer, when a state, which the cabinet was closed from the open state of the cabinet, is detected.

Abstract: A foldable mobile communication terminal and a calling method thereof, in which calling operation to a telephone number is started from the open state of its cabinet, and the calling operation is executed smoothly by reducing one of processes of the calling operation, are provided. The foldable mobile communication terminal, in which data communication is executed at the open state of its cabinet and voice communication is executed at the closed state of the cabinet, provides an inner side displaying section for displaying data inputted or received at the open state of the cabinet, a calling number input buffer for storing data of a telephone number displayed on the inner side displaying section, and a voice communication changing over section for changing over from the data communication to the voice communication to the telephone number storing in the calling number input buffer, when a state, which the cabinet was closed from the open state of the cabinet, is detected.

Abstract: In a radio selective call receiver, a reception channel is efficiently selected from a plurality of radio channels without unnecessary channel switch. When having lost synchronism with a first radio channel, the radio channels are scanned in a predetermined sequential order to search for a second radio channel with which synchronization is established. When the second radio channel has been found, it is again determined whether synchronization can be established with the first radio channel. When synchronization has been established with the first radio channel, the first radio channel is selected as the reception channel. When synchronization fails to be established with the first radio channel, the second radio channel is selected as the reception channel.

Abstract: In a radio selective call receiver, the sensitivity of a radio receiver is set to a lower sensitivity level which is lower than a normal sensitivity level of the radio receiver. In the lower sensitivity level, a plurality of predetermined channels are searched for a receiving channel while receiving a radio signal. Therefore, a receiving channel with higher signal level can be selected. When no receiving channel is found in the lower sensitivity, the channel search is performed in the normal sensitivity.

Abstract: A radio selective paging receiver includes a reception unit, a control unit, and a timepiece unit. The reception unit is controlled to start transmission in synchronism with at least a standard time, receives a radio signal modulated by a selective paging signal containing time information in transmission information, and demodulates the radio signal. The control unit controls operation of the reception unit, determines call reception and time information in accordance with the demodulated signal, and processes the call reception and the time information. The timepiece unit at least temporarily holds the obtained time. In setting the time information obtained by operating the reception unit to the timepiece unit, the control unit adjusts the time with a predetermined time lag such that a carry to the minute or hour unit is not generated at a predetermined timing self data is received.

Abstract: A pager which does not delete or rewrite received messages can be produced at such a low cost that it is viable as a disposable pager. Messages are stored sequentially as they are received, packed in memory end-to-end, so that memory efficiency is maximized. No complex memory management is required, minimizing production costs. If memory is full or near-full when a new message is received, either the message is displayed and not stored, or receipt of the new message is refused. By using removable, nonvolatile memory modules, the pager unit can be reused, while enabling old messages to be externally archived for indefinite periods of time.

Abstract: In a selectively called radio receiver operable with battery saving and including a memory (21) for predetermined bit rates and predetermined formats (synchronizing signals, each accompanied by at least one identification code specific to the receiver) in correspondence to the bit rates a received radio signal of a good received state is demodulated into a demodulated signal including at least one selective call signal and having an input bit rate, which is judged as an adjudged bit rate if identical with one of the predetermined bit rates with an error allowed. Provided that the demodulated signal has at least one of the predetermined formats that corresponds to the adjudged bit rate and provided that the selective call signal includes the identification code according to the at least one of predetermined formats, a message signal is produced from the demodulated signal.

Abstract: A radio apparatus judges whether the electric field intensity of a radio signal detected by a level detector is high by a comparator. The radio apparatus detects a synchronizing signal for making synchronization with the radio apparatus from the radio signal by a synchronizing signal detector. Moreover, the radio apparatus detects the bit rate of an information stop signal in a system using a POCSAG signal of a radio selective-calling receiver from the radio signal by a stop signal detector. When the electric field intensity of the radio signal is high, the synchronizing signal is not detected, and the bit rate of the information stop signal is not detected, the radio apparatus decides by a decision circuit that cross modulation occurs in the radio signal and attenuates the radio signal by turning on an attenuator.

Abstract: A paging receiver having a conversion table for storing plural canned messages. In the receiver, when a space data is included in one of the first predetermined figures of a received signal, data preceding the space data is determined as a conversion code. The conversion code is converted to a corresponding canned message in the conversion table. Information including the canned message and a general message following the space data of the received signal is displayed.

Abstract: A radio selective calling receiver which can display a message sent from a transmission site and can be remotely controlled to set a reception inhibition status and a reception permission status. A plurality of selective calling numbers are assigned to the selective calling receiver, and at least one of the assigned selective calling numbers is used for remote control. The selective calling receiver has a memory for storing information relative to each of the assigned selective calling numbers, a decoder for determining whether a received selective calling number agrees with either one of the assigned selective calling numbers, and a control unit for decoding a message associated with the received selective calling number and updating the information stored within the memory based on the decoded message if the received selective calling number is the assigned selective calling number for remote control.

Abstract: A radio paging receiver of this invention includes a decoder section. The decoder section includes a bit synchronization circuit, a preamble detector, a synchronization signal detector, an address detector, and a reception controller. The preamble detector checks a preamble signal in a plurality of phases of the clock extracted by a bit synchronization circuit, and outputs a preamble detection signal when the preamble signal is detected in at least one phase.

Abstract: A method for eliminating the troublesome need to select and erase messages one by one which are stored in a memory of a radio pager. A multi-function switch is provided via which the pager can be switched on and off. A controller of the pager determines if each of messages stored in the memory has been retained in the memory for more than a predetermined period of time. Then, a message is erased in the event that one of: (A) the message has been stored in the memory for more than the predetermined time period and the multi-function switch is operated in a manner which changes the on/off status of the pager; and (B) (i) the message has been stored in the memory for more than the predetermined period of time and the pager is in the power on status, or (ii) the message has been stored in the memory for more than the predetermined period of time when the pager is switched on after being switched off.