optical ethernet
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computer science technology
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20-01-2010, 10:39 AM

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
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05-02-2011, 10:06 PM

i am not able to get ppt on optical ethernet. is it available here?
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25-06-2012, 02:23 PM


.pptx   optical ethernet.pptx (Size: 346.24 KB / Downloads: 44)


Optical Ethernet: combination of two technologies- EHTERNET & OPTICS
It combines the flexibility and simplicity of Ethernet with the reliability and speed of optics.
Optical Ethernet attributes – simplicity, speed, and reliability . It removes the bandwidth bottleneck between the LAN and the WAN

Optical Ethernet Building Blocks

Ethernet Over Fibre (EoF): electrical to optical translation over dark fiber.[Point-to-Point & Mesh topology
Ethernet Over Resilient Packet Ring (EoRPR): it solves the traditional problem of SONET bandwidth ‘waste’.[RING topology]
Ethernet Over DWDM (EoDWDM): utilizes DWDM as its core transport. EoDWDM is byte rate and protocol independent that allows into work in almost any network scenario.[Ring, Mesh, Point-to-Point topology]
HYBRID: The above blocks merged together.

Ethernet Network Elements

Data terminal equipment (DTE)—Devices that are either the source or the destination of data frames. DTEs are typically devices such as PCs, workstations, file servers, or print servers that, as a group, are all often referred to as end stations.
Data communication equipment (DCE)—Intermediate network devices that receive and forward frames across the network. DCEs may be either standalone devices such as repeaters, network switches, and routers, or communications interface units such as interface cards and modems

10-Gigabit Ethernet Proposed Standards

1st: very-short-reach optics, to be implemented as parallel data streams over a fiber-optic ribbon containing 12 multimode fibers.
2nd: uses a very compact package (about 1" x 0.75" x 3") containing a coarse WDM device, four receivers, and four lasers operating approximately 25 nm apart in wavelengths near 1300 nm. Each transmitter/receiver pair operates at 3.125 gigabaud (data stream at 2.5 Gbps).


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