Cisco 400GBASE Quad Small Factor Pluggable Double Density（QSFP-DD）产品组合为客户提供了各种超高密度收发器模块，并为数据中心、高性能计算网络、企业核心和分发层以及服务提供商应用程序提供了400千兆以太网连接选项的灵活性。QSFP-DD模块是我们新一代的400G收发器模块，基于QSFP-DE外形。
Table 1. Feature and Benefits of Cisco QSFP-DD Modules
Feature
Benefit
Hot-swappable
Input/output device that plugs into 400G Ethernet Cisco QSFP port
Interoperable
Interoperable with other IEEE-compliant 400GBASE interfaces where applicable
Certified on Cisco platform
Certified and tested on Cisco QSFP-DD 400G ports for superior performance, quality, and reliability
Compatible with IEEE 802.3
High-speed electrical compliant to IEEE 802.3cd and IEEE 802.3bs
Compatible with MSA
Optical and coding compliant to QSFP-DD MSA CMIS Rev4.1, OIF 56G PAM4, and 100G Lambda MSA
Backward compatibility
QSFP-DD port is backward compatible with QSFP+, QSFP28 and QSFP56 modules
Breakout capability
Some QSFP-DD modules have the capability to interface to multiple 100G modules when operated in breakout mode, providing higher port density for 100G interfaces, and easing the migration to 400G platforms
Note: Except for QDD-400G-DR4-S, QDD-4X100G-FR-S, QDD-4X100G-LR-S, only connections with patch cords with PC or Ultra-Physical Contact (UPC) connectors are supported. QDD-400G-DR4-S, QDD- 4X100G-FR-S, QDD-4X100G-LR-S require patch cords with Angled Physical Contact (APC) MPO connectors. All cables and cable assemblies used must be compliant with the standards specified in the standards section of this data sheet. For more information and references on QSFP-DD cable guides, please click on the following link: Cisco Transceiver Modules – Brochures – Cisco
