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US 5,963,350 AGranted
Optical telecommunications network
AssigneeBritish Telecommunications public limited company
InventorAlan Michael Hill
Life of this patent
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Abstract
An 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.
Claims13
An optical telecommunications system comprising:
- a) a plurality of transparent passive optical networks (TONs) and a common passive rounting node;
- b) each transparent passive optical network, comprising a head end and a plurality of terminals;
- c) each of the terminals including means for selecting a wavelength channel or a wavelength-and-time channel and thereby establishing a connection with a selected other one of the terminals;
- and
- d) each of the head ends being connected to the common passive routing node which includes at least one dummy port.
2 more elements
Dependencies are inferred from the claim text.