Michihiro Izumi

Spread spectrum communication apparatus and telephone exchange system

Communication apparatus, control method of communication apparatus, and control program of communication apparatus

Call waiting notifying apparatus

Image communication control method, image communication control program, and image communication apparatus

Telephone and telephone system having temporary transfer and hold-release functions

Spread-spectrum communication apparatus

Communication apparatus capable of communicating via different types of communication lines and control method thereof

Private branch exchange and line exchange method

Communication apparatus and system, and control method

Image communication system capable of visually outputting image data of image input apparatus and transmitting image data to communication line, and method of controlling the same