| 摘要 |
PCT No. PCT/GB95/00726 Sec. 371 Date Sep. 27, 1996 Sec. 102(e) Date Sep. 27, 1996 PCT Filed Mar. 29, 1995 PCT Pub. No. WO95/26592 PCT Pub. Date Oct. 5, 1995An optical telecommunication system includes a number of transparent passive optical networks (TONs). Each TON connects a respective group of terminals and the head end of each TON is connected to a common central switching node. Each terminal includes selecting a wavelength/time channel for forming a connection with another terminal within the respective TON or within another TON. The central switching node comprises an optical spatial/wavelength switch arranged to provide switched connections between subscribers connected to different TONs.
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