20-01-2010, 10:39 AM
Abstract;
Optical Ethernet is the technology that extends Ethernet beyond the local-area network (LAN) and into metropolitan-area networks (MANs) and wide-area networks (WANs),The adoption to the economical bi-directional optical Ethernet system with one fiber has increased rapidly at optical distribution network in the domestic market because of the explosive increase of the number of broadband access subscriber in recent years, and system can provides 100Mbps transmission to each subscriber and has high accommodation performance for subscriber lines, so that it provides the economical system, Ethernet directly over fibre. The reduced end to end complexity can lead to faster payback for operators.,optical Ethernet advances promise to take Ethernet transport to levels undreamed of back then and not even feasible using copper technologies, Optical technologies enable Ethernet networks to extend over much greater distances than campus Ethernet nets. Running over single-mode fiber, Optical Ethernet lets links in the network range from 3 to more than 6 miles in the case of 1310-nm wavelength technology, and up to 43.4 miles for 1550-nm wavelength technology., Optical Ethernet can also deliver guaranteed levels of latency, jitter and bandwidth. Most network operators possess an existing SDH-transport network as a basis for Carrier Class (fail-safe) voice-data networks. When an SDH network is supplemented by Ethernet functionalities, new sources of income for the network operator are the result. By multiple use of the currently fixed end-to-end paths (often assigned to only one customer), those SDH networks can offer many times the subscriber numbers and consequently "virtual bandwidths".IP (Internet Protocol) is the standard protocol for Ethernet. By means of a possible protocol-mediation-function access to existing ATM- and Frame Relay networks can be guaranteed. This also provides the basis for Ethernet as the Multi-Service Solution
