Abstract: An avionic connector interface distribution unit interfaces a central controller with a plurality of avionic devices. The distribution unit comprises a large avionic connector (16), a mother input/output (I/O) printed wiring board (18), first and second daughter I/O printed wiring boards (20, 22), first and second parallel headers (28, 30) formed of matable connector pairs, and a plurality of miniature connectors (14). The mother board (18) includes first and second planar surfaces, and each of the daughter boards (20, 22) includes first and second planar surfaces. The first and second daughter boards (20, 22) are generally co-planar and adjacent to each other, and these daughter boards (20, 22) are parallel to the mother board (18). The second surface of the mother board (18) faces the first surfaces of the daughter boards (20, 22). The first header (28) is situated between and mounted to the second surface of the mother board (18) and the first surfaces of the first daughter board (20).

Abstract: A telecommunication system has a facility and an addressable terminal coupled through a transmission medium. The facility includes means for providing addressed video frames containing information corresponding to still images and for providing addressed audio frames containing information corresponding to audio bursts. There is also provided for non-addressed signals containing information corresponding to at least two channels of continuous audio. A selection code is inserted in one or more of the frames. The addressed video and audio frames and non-addressed signals are coupled to the transmission medium to the addressable terminal. The terminal has means for detecting said addressed video frames, addressed audio frames, and non-addressed signals. Circuits select video frames and audio frames in response to their corresponding addresses. One of said continuous audio channels is selected in response to said selection code.