| 摘要 |
PROBLEM TO BE SOLVED: To provide a wavelength division multiplex(WDM) network that provides seamless connection performance from a long distance network to a metropolitan area network, to an access network and finally to a desktop of a user. SOLUTION: A WDM ring architecture includes a central node 102 that generates a plurality of WDM signals with a plurality of continuous wave (non modulation) optical wavelengths, which are sent to a plurality of access nodes 111, 112, 113, 114 of the system via an optical facility. One or two or over of the non modulation optical wavelength are separated from the WDM signal received via the optical facility, modulated by a user's or customer's signal and multiplexed on the WDM signal on the optical facility. |
