Abstract: A communication system offering specific services to specific persons bears a portable memory device with a record of personal information such as the bearer's identification number, class of service, personal data, etc. In making a call, the bearer of the memory device puts it on a communication terminal device and the terminal device reads out the personal information, which is transferred to a data processor such as a central processor in the exchange so that a service specific to the calling person is rendered.

Abstract: A communication system offering specific services to specific persons bears a portable memory device with a record of personal information such as the bearer's identification number, class of service, personal data, etc. In making a call, the bearer of the memory device puts it on a communication terminal device and the terminal device reads out the personal information, which is transferred to a data processor such as a central processor in the exchange so that a service specific to the calling person is rendered.

Abstract: A personal-call communication system wherein a personal identification number is assigned to each telephone user, and an arbitrary person is called by wireless by dialing a corresponding personal calling number. The called person sets an ID-card-type portable device memorizing one's own personal identification information in a card reader of a telephone set, and communicates with the calling party over the wire system via an exchange. The system allows a direct call of an individual person, who in turn has a choice as to whether or not a response should be taken depending on the calling party whose name is indicated to the called party.

Abstract: A push button of rubber or other resilient material for use with a push-button switch and comprising a hollow tilting wall of a mesa shape. The tilting wall of the resilient push button serving as an operating portion is constructed such that its thickness gradually decreases in going from an upper portion toward an intermediate portion and gradually increases in going from the intermediate portion to a lower portion. A curved surface curving inwardly toward the interior of the switch is formed to extend from the intermediate portion to the upper portion. When pressure is first applied to a key top, the curved surface is bent inwardly toward the lower portion of the switch; and when further pressure is applied to the key top, the surface area of the intermediate portion, which is bent inwardly, is increased until the pressure affects the upper portion of the tilting wall.