An interface for an optical node with a plurality of input ports and output ports in SONET/SDH optical network connected to a plurality of virtual concatenation channels has a plurality of input ports for taking Ethernet signals as inputs, and a plurality of output ports for selectively outputting Ethernet...http://www.google.com/patents/US20020176450?utm_source=gb-gplus-sharePatent US20020176450 - System and methods for selectively transmitting ethernet traffic over SONET/SDH optical network
