Casio Computer Co., Ltd.

Katsumi Muroi

Hiroyuki Ishikawa

Takao Uchikura

In a first PHS terminal, a system calling code for identifying a system in which the first PHS terminal is registered and a slave ID number for discriminating the first PHS terminal are stored in advance in an ID chip. While a user is out, he or she sets the ID chip in a second PHS terminal which does not have the same system calling code as that of the first PHS terminal. When the user performs an operation for peer-to-peer communication on the first PHS terminal, the second PHS terminal is called using a controlling physical slot. The second PHS terminal is informed that it is called by discriminating a system calling code and a PS calling number of the physical slot on the basis of the system calling code of the ID chip, and then transmits a response signal to the first PHS terminal based on the system calling code and PS calling number of the ID chip. Thus, peer-to-peer communication can be performed even between radio communication terminals which do not have the same system calling code.

Radio communication system and radio communication terminal

A large number of name and telephone number numerical data can be stored in a RAM, and a reservation flag which represents whether a call is made or not can be set for each telephone number numerical data. A time mode for displaying time, a search mode for sequentially displaying all telephone number data stored in the RAM, or a reservation mode for displaying only the telephone number data having a reservation flag can be selectively set upon operations of switches SW1 and SW3. A dialing tones generator and a speaker are arranged to convert the displayed telephone number data into dialing tones and output the converted dialing tones.

Growing community of inventors

Tachikawa, Japan

Katsumi Muroi