QSFP-DD interconnect system’s 8-lane electrical interface transmits up to 28 Gbps NRZ or 56 Gbps PAM-4, up to 200 or 400 Gbps aggregate, with the same module form factor as QSFP interconnects, making them backward compatible.
Telecommunication and data center customers have increasing bandwidth requirements and, therefore, require high-density interconnects. QSFP-DD interconnect system enables faceplate density equal to the current 2x1 QSFP form factor, but with 8-lane ports. In other words, a total of 256 differential pairs with 32 ports delivers double-lane density within the same form factor.
Customers can upgrade their box in advance of new cables, and their infrastructure won’t be idle while they wait for cables to be built. QSFP-DD Interconnect System supports legacy cables as well as upgraded plugs.
The MSA had defined:
- QSFP-DD Module form factor
- 2-by-1 cage and connector form factor
- 1-by-1 cage and SMT connector form factor
- Pinout and management interface
This is not a definitive list of applications for this product. It represents some of the more common uses.