REMOTE NODE AND CENTRAL OFFICE NODE FOR PROTECTING BIDIRECTIONAL SINGLE OPTICAL FIBER WDM RING NETWORK

摘要

The present invention relates to a remote node and a central office node for protecting a bidirectional single optical fiber wavelength division multiplexing ring network. The remote node according to the present invention includes at least four filters, at least two optical power dividers, at least two optical fiber ports for communicating with a bidirectional single optical fiber used in the bidirectional single optical fiber wavelength division multiplexing ring network, and at least two optical ports for communicating with a remote light transceiver used in the bidirectional single optical fiber wavelength division multiplexing ring network.