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公开(公告)号：EP0938836B1
公开(公告)日：2001-03-14
申请号：EP97911153.1
申请日：1997-11-05
申请人： TELLABS DENMARK A/S
发明人： DAUGAARD, Kim
CPC分类号： H05K1/14 , H05K7/1424 , H05K7/1445
摘要： A board magazine (1) for printed circuit boards comprises holders (9, 10) adapted to hold a plurality of substantially planar printed circuit boards (6) in a pattern forming two stacks (7, 8), each stack comprising two or more printed circuit boards arranged mutually in parallel. The printed circuit boards in one stack form an angle with the printed circuit boards in the other stack, and electrical connections are arranged from a board in one stack to one or more boards in the other stack. According to the invention, the holders are arranged to hold the printed circuit boards in both stacks at an angle to the horizontal. This provides for cooling by natural air convection for all the boards.
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2.发明授权A METHOD AND A SYSTEM TO ENSURE THAT MODULES TO BE CONNECTED TO AN ELECTRONIC APPARATUS ARE OF A SPECIFIC TYPE, AND A MODULE AS WELL AS A STORAGE MEDIUM THEREFOR 失效方法和系统可以确保与相关模块从某型电子设备和模块和存储设备THEREFOR
公开(公告)号：EP0932860B1
公开(公告)日：2001-07-18
申请号：EP97944752.1
申请日：1997-10-22
申请人： TELLABS DENMARK A/S
发明人： DAUGAARD, Kim
CPC分类号： G06F21/445
摘要： A method for ensuring that modules (3, 4) to be connected to an apparatus comprising a processor are of a specific type, comprises providing these modules (3, 4) with a code circuit (6, 7; 13; 21; 24) capable of outputting one or more code words on request. When a module has been connected to the system, the processor of the apparatus reads one or more of said code words from the code circuit (6, 7; 13; 21; 24) of the module, compares the read code word or words with reference code words stored in the apparatus (2), and rejects the module if the read code word or words do not correspond to the reference code words. A large number of different code words are stored in the code circuit (6, 7; 13; 21; 24) of the specific type, and the code circuit is moreover adapted such that a code word can be output correctly only after the lapse of a prefixed period of time, which is considerably longer than a normal output time determined by the implementation of the code circuit, after a previous output of a code word.
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