A local area network/wide area network (LAN/WAN) switch is presented which aggregates LAN traffic onto SONET/SDH transport streams in a programmable manner. The system can concentrate Ethernet packets and map the data onto SONET streams at data rates varying from STS-1 to STS-12C. Depending on the bandwidth...http://www.google.es/patents/US7649900?utm_source=gb-gplus-sharePatente US7649900 - Local area network/wide area network switch
