| 摘要 |
PCT No. PCT/EP92/02902 Sec. 371 Date May 17, 1994 Sec. 102(e) Date May 17, 1994 PCT Filed Dec. 12, 1992 PCT Pub. No. WO93/13617 PCT Pub. Date Jul. 8, 1993Fault tolerant topology for passive optical networks essentially based on a "tree configuration" with branch points or nodes (16, 17) made up of passive optical splitters, in which each node (16, 17) of a specific level is connected to the same number of nodes (16, 17) of the level immediately below by two or more branches (Rd, Rs) and a supplementary connection (S1, S2 . . . ) is provided between each pair of nodes of the same level (FIG. 1).
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