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June 1, 2018

OSFP vs. QSFP-DD

Introduction to OSFP
The OSFP is a new pluggable form factor with eight high speed electrical lanes that will initially support 400 Gbps (8x50G). It is slightly wider and deeper than the QSFP but it still supports 36 OSFP ports per 1U front panel, enabling 14.4 Tbps per 1U. Since the OSFP is slightly wider and deeper than the QSFP, it is possible to build an adaptor that supports existing 100G QSFP optics modules in a OSFP cage. OSFP to QSFP adapter for backward compatibility

Product Type

  • OSFP copper cables 400G-CR8 Black N/A
  • OSFP AOC Cables 400G-AOC Grey 422U
  • OSFP 850nm solutions 400G-SR8,SR4 Beige 475U
  • OSFP 1310nm solutions for up to 500m 400G DR4 Yellow 107U
  • OSFP 1310nm solutions for up to 2km 400G FR4, FR8 Green 354C
  • OSFP 1310nm solutions for up to 10km 400G LR8 Blue 300U
  • OSFP 1310nm solutions for up to 40km 400G ER8 Red 1797U

 

Introduction to QSFP-DD
The QSFP-DD module form factor is the industry’s smallest 400GbE module providing the highest port bandwidth density. This form factor leverages the industry’s manufacturing capability and cost structure that supports QSFP+ and QSFP28, the industry’s most prevalent form factor for 40GbE and 100GbE, respectively. QSFP-DD can support 36 ports of 400GbE in a single Rack Unit (RU) providing over 14Tb/s of bandwidth.

The QSFP-DD will support:

  • 3m of passive copper cables
  • 100m over parallel multimode fiber
  • 500m over parallel single mode fiber
  • 2 km and 10km over duplex single mode fiber
  • WDM and Coherent designs
  • Backward compatible with all QSFP based transceivers from 40G to 200G

 

400Gbe OSFP and QSFP-DD

Form Factor QSFP-DD OSFP
Size 18.35×58.26×8.5 22.93×100.40×13.0
power 12W 15W
density 32 port 36 port
interface 8x50G 8x50G

 

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