Intra-shelf free space interconnect

Details Intra-shelf free space interconnect Intra-shelf free space interconnect

1996-12-27

1999-09-28

Sheikh, Ayaz R.

Electrical computers and digital data processing systems: input/

Intrasystem connection

Bus access regulation

361600, 361720, 361736, 361731, 361788, G06F 1300, H02B 100

Patent

active

059580305

ABSTRACT:
A free-space intra-shelf interconnect system is provided in which each of a number of circuit boards in a shelf communicates with any other board through free-space interconnects. Each board is equipped with a free-space transmit coupler to transmit a signal to a free-space receive coupler of an adjacent board. Simply sliding the boards in the shelf and latching them in place as usual, automatically aligns the transmit and receive couplers for optimum coupling. System configurations are provided for building a closed communication loop within the shelf, that allows for data communications between any board within the shelf. Logical addressing allows for interchangeability of boards within a shelf. This, in turn, allows for moving a defective board to the end positions of a shelf for debugging purposes. An extender board for testing and debugging purposes is also provided if free physical access to both board surface areas is simultaneously needed. A redundant system configuration with two communication loops in the shelf is provided which can survive the failure of any board.

REFERENCES:
patent: 4856091 (1989-08-01), Taska
patent: 5432486 (1995-07-01), Wong
patent: 5648892 (1997-07-01), Wieloch et al.
patent: 5818349 (1998-10-01), Dayton
patent: 5838845 (1998-11-01), Leone et al.
English Abstract of German Patent DE 39 08 786 C2, International Class G08C 17/00.

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