The CDFP Multi-Source Agreement (MSA) last week released Rev. 3.0 of its specifications for a 400-Gbps (16 x 25 Gbps) pluggable optical module. The updated specifications include coverage of a new Style 3 module intended for applications based on proposed draft specifications from the IEEE P802.3bs 400 Gigabit Ethernet Task Force.
The new Style 3 module uses the same connectors as the previous Style 1 and Style 2 modules. However, the Style 3 module cage is mechanically keyed to prevent mismating with Style 1 and Style 2 modules.
Work began on the CDFP before the 400 Gigabit Ethernet Task Force first met; the MSA officially formed in 2013 (see "More standards on tap for high-speed Ethernet" and "CDFP MSA releases v2.0 specifications for 400G modules").The CDFP's support of data rates of 25 Gbps over 16 lanes mirrors what is expected to be the Task Force's approved configuration for multimode fiber applications. The Task Force is still debating what configurations its members will approve for singlemode fiber applications (see "Is serial 100G ready for 400 Gigabit Ethernet standardization?"). Nevertheless, the MSA members are confident that the form factor will find use not only in multimode fiber applications targeting 100 m but singlemode fiber applications of up to 2 km as well. The module is designed to accommodate multiple configurations, e.g., as a single 400 Gbps interface, to aggregate sixteen 25-Gbps interfaces, or to aggregate four 100-Gbps interfaces.
The CDFP MSA specifications describe both short- (Style 1) and long-body (Style 2) versions. The MSA members expect the form factor to find use with direct attach cables, active optical cables, and connectorized optical modules.
CDFP MSA founder-promoters include Avago Technologies, Brocade Communications, IBM Corp., JDSU, Juniper Networks, Molex Inc., and TE Connectivity. Contributing member companies include FCI, Finisar, Huawei, Inphi, Ixia, Mellanox Technologies, Nextron, Oclaro, Semtech, Sumitomo Electric, Xilinx, and Yamaichi Electronics.
Additional information is available on the MSA's website.
For more information on optical transceivers and suppliers, visit the Lightwave Buyer's Guide.
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