Abstract: An information means with waterproof and transmitting light characteristic is disclosed to include a connector, an electric device connected to the connector for data storage and transmission, a transparent waterproof member surrounding the connector around the electric device for protection against outside water, an outer layer surrounding the waterproof member and a part of the connector and the whole area of the electric device for protection against external heat energy, and a light guide extending from the transparent waterproof member to the outside of the outer layer for guiding light from electric device to the outside for visual check of the operation status of the electric device.

Abstract: A system is disclosed which permits simultaneous multiple switched type communications on a basic access integrated services digital network (ISDN) without changing the standard frame format for transmission on the S/T interface. Simultaneous communication by up to 2N terminal equipments is achieved by defining a multiframe of N subframes, and separately allocating each of the 2N time slots of the B-channels within the N subframes to up to 2N terminal equipments for simultaneous communication over a single S interface bus.