Fujitsu Corporation

Hiroyuki Nagatani

Makoto Ishida

Tetsuya Hanawa

Masahiro Konno

Mitsunori Maeda

Masahiro Aota

Kazuhiro Satoh

A communication control system for intervening in the communication between a PC terminal in an external network and a portable telephone terminal with an electronic mail transmission/reception function in a mobile communication network has a database in which a portable telephone number and a mail account are stored in association with each other. Upon receipt of an access request with an FQDN to a predetermined portable telephone terminal from the PC terminal, the communication control system solves the name of the portable telephone terminal by searching the database on the basis of a host name (mail account name) extracted from the FQDN to acquire the telephone number corresponding to the host name (mail account name) as address information, thereby making a connection of the communication to the mobile communication terminal on the basis of the address information acquired by solving the name.

Communication control system

A power switching unit of a portable telephone which has a function of storing data such as telephone numbers and operates with a battery. The unit comprises a battery for supplying power to a radio unit and a control unit which contains a data storage function and controls operation of the radio unit, first voltage monitor means for monitoring a supply voltage of the battery to output a first voltage drop signal when the supply voltage falls below a first predetermined value, and communication disconnection means for stopping power supply to the radio unit upon reception of the first voltage drop signal. The power switching unit of the portable telephone further includes voltage adjustment means for adjusting voltage suppled to the control unit from the battery to a predetermined operating voltage of the control unit for supplying it to the control unit.

Power switching unit of a portable telephone capable of monitoring and controlling a battery supply voltage thereof

In a first aspect of the invention, when it is expected to disconnect a booster during a call, the station class mark is changed to that applicable when a portable telephone is used as an independent unit in accordance with a key input from the user before the initiation of the call. In a second aspect of the invention, the telephone number of the remote party is stored in a memory during a call. When a connection or disconnection of a booster is detected, the call is terminated, and a redialing operation is automatically performed using the stored telephone number. In a third aspect of the invention, when the connection of a booster is detected during a call, an instruction is given to the booster to operate in a portable telephone mode. In a fourth aspect of the invention, when the connection or disconnection of a booster is detected during a call, a request to change the station class mark is sent to the base station.

Growing community of inventors

Kawasaki, Japan

Hiroyuki Nagatani