As the growing bandwidth for network aggregation applications surpassed the capabilities of networks employing link aggregation with 10 Gigabit Ethernet, IEEE's Higher Speed Study Group started to work toward the 100 Gigabit Ethernet (100GbE). 100GbE means the transfer of Ethernet frames is at the rates about 100 gigabits per second. Thus 100G transceivers have been specifically designed to meet the needs of high speed. And CFP (C form-factor pluggable) transceiver is adopted to support 100 Gigabit Ethernet. During these years 100G CFP transceivers get great improvements from the first version to the third version.
The First Version
CFP is a multi-source agreement to produce a common form-factor for the transmission high-speed digital signals. C stands for the Latin letter C used to express the number 100 (centum), as the standard was primarily developed for 100 Gigabit Ethernet systems or more. CFP was designed after the SFP (small form-factor pluggable) transceiver, but is significantly larger to support 100Gbps. The electrical connection of a CFP uses 10 x 10Gbps lanes in each direction (RX, TX). The optical connection can support both 10 x 10Gbps and 4 x 25Gbps variants. 100G CFP transceivers can support a single 100Gbps signal like 100GE or OTU4 or one or more 40Gbps signals like 40GE, OTU3, or STM-256/OC-768. 100G CFP transceivers have several outstanding features, including advanced thermal management, EMI management and enhanced signal integrity design, as well as a MDIO-based management interface.
The Second Version
However, as the improvements of technology, devices for higher performance and higher density are created such as the CFP2 optical transceiver. The CFP2 optical transceiver is the follow-on module of CFP, which can support the IEEE 100 Gigabit Ethernet and ITU OTU4 standards. It’s half the size of CFP and consumes half the power. CFP2 optical transceiver is designed by reducing the number of electrical lanes from 10 to 4 by applying a 25Gbps electrical interface per channel instead of 10Gbps and hence removing the GearBox from the module. The CFP2 is also fully-compliant with the MSA, IEEE and ITU-T specifications. Due to its high performance and high density, CFP2 is now very popular in the market.
The Third Version
CFP and CFP2 are the first two versions and have been already common. Then people are moving to CFP4 optical transceiver. The first CFP4 products are expected to appear in 2013. But it was until 2014 the CFP4 specifications document has been available during an optical fiber communication conference. CFP4 transceivers are optimized and have features like 4x25G lanes, maximum link length of 10km on single-mode fiber (SMF), lower than 6W power usage, half the size of CFP2. Now CFP4 transceivers are not as common as CFP and CFP2. There are only very few CFP4 equipment in the market.
CFP, CFP2 and CFP4 transceivers will support the ultra-high bandwidth requirements of data communications and telecommunication networks that form the backbone of the internet. Fiberstore offers 100G-SR10 CFP, 100GBASE-LR4 CFP2 and CFP4 modules. Our 100G transceivers are certified to be highly compatible with many brands through 100% test, such as Cisco, HP, Juniper, Nortel, Force10, D-link, etc. They can meet all your Ethernet transmission and reception needs.
Originally published at http://www.china-cable-suppliers.com/
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