100GbE_Overview_white_paper(10)

100GE以太网技术介绍

Pluggable transceiver modules compliant to the CFP MSA are an option for 40 and 100G Gbps interfaces.

8Transceiver.OptionsAs the IEEE moves forward in finalizing the 40 Gbps and 100 Gbps standard P802.3ba, many wonder which transceiver type will win out as the final industry higher speed Ethernet connec-tor. With the recent formation of a new multi-source agreement (MSA) between several of the top transceiver manufacturers (Avago, Finisar, Opnext, and Sumitomo), it appears that hot-pluggable optical CFP transceivers are the clear front runner.Both the OIF and the ITU-T are working on standardizing SDH/OTN telecom interfaces for long-haul transmission of 100 Gbps. The CFP MSA defines a hot-pluggable optical transceiver form factor to enable 40 and 100 Gbps applications. Pluggable CFP transceivers will support the ultra-high bandwidth requirements of data communications and telecommunication networks that form the backbone of the internet.Pluggable transceiver modules compliant to the CFP MSA are an option for 40 and 100 Gbps interfaces. The CFP MSA is defining the specifications required to support multiple applications using the same form factor. These applications include various protocols (such as 40 Gbps, 100 Gbps, OC-768/STM-256, OTU3), media types (multimode and single mode fiber optics), and link distances. The CFP MSA uses numerous innovative features such as advanced thermal manage-ment, EMI management, and 10 Gbps signal integrity design to define the transceiver mechanical form factor, the optical connector, the 10x10Gbps electrical connector with its pin assignments, the MDIO-based transceiver management interface, and the hardware required on the system host board.Another niche option being developed for shorter-length connections is quad small form-factor pluggable (QSFP) transceivers. The QSFP MSA defines the connector as a 4-channel QSFP bi-directional electrical-to-electrical connectivity over distances up to 100 meters. Each independent channel is capable of 5, 8 or 10 Gbps, for an aggregate bi-directional bandwidth of up to 40 Gbps.QSPF transceivers are multi-mode fiber, short-reach only transceivers designed specifically for 40 Gbps devices. Their application is mainly for links within the data center, and are significantly less expensive than their CFP counterparts. Efforts.to.bring.40.and100.Gbps.to.market..in.the.near-termWhile the 802.3ba task force hones in on the final standard, carriers and large information ser-vice organizations are expressing a dire need to begin testing deployments of 40 and 100 Gbps services. A number of proposals were offered, but PCS lane distribution (first described by Mark

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