Editing Small Form-factor Pluggable (section)

===SFP-DD===
The '''small form-factor pluggable double density''' ('''SFP-DD''') multi-source agreement is a standard published in 2019 for doubling port density. According to the SFD-DD MSA website: "Network equipment based on the SFP-DD will support legacy SFP modules and cables, and new double density products."<ref>http://sfp-dd.com/ SFP-DD MSA</ref>
SFP-DD uses two lanes to transmit.

Currently, the following speeds are defined:
* SFP112: {{val|100|u=Gbit/s}} using PAM4 on a single pair (not double density)<ref name=sfp-dd.spec>{{cite web |author=SFP-DD MSA|title=SFP-DD/SFP-DD112/SFP112 Hardware Specification for SFP112 AND SFP DOUBLE DENSITY PLUGGABLE TRANSCEIVER Revision 5.1 |url=http://sfp-dd.com/wp-content/uploads/2022/03/SFP-DDrev5.1.pdf |date=March 11, 2022}}</ref>
* SFP-DD: {{val|100|u=Gbit/s}} using PAM4 and {{val|50|u=Gbit/s}} using NRZ<ref name=sfp-dd.spec/>
* SFP-DD112: {{val|200|u=Gbit/s}} using PAM4<ref name=sfp-dd.spec/>
* QSFP112: {{val|400|u=Gbit/s}} (4 × {{val|112|u=Gbit/s}})<ref name=qsfp-dd.msa>{{cite web |last1=QSFP-DD MSA |title=QSFP-DD/QSFP-DD800/QSFP112 Hardware Specification for QSFP DOUBLE DENSITY 8X AND QSFP 4X PLUGGABLE TRANSCEIVERS Revision 6.3 |url=http://www.qsfp-dd.com/wp-content/uploads/2022/07/QSFP-DD-Hardware-Rev6.3-final.pdf |date=July 26, 2022}}</ref>
* QSFP-DD: {{val|400|u=Gbit/s}}/{{val|200|u=Gbit/s}} (8 × {{val|50|u=Gbit/s}} and 8 × {{val|25|u=Gbit/s}})<ref>SFF INF-8628</ref>
* QSFP-DD800 (formerly QSFP-DD112): {{val|800|u=Gbit/s}} (8 × {{val|112|u=Gbit/s}})<ref name=qsfp-dd.msa/>
* QSFP-DD1600 (Draft) {{val|1.6|u=Tbit/s}}<ref>{{cite web |url=http://www.qsfp-dd.com/wp-content/uploads/2024/07/QSFP-DD-Hardware-Rev7.1.pdf |title=QSFP-DD MSA |date=2024-07-25 |access-date=2024-08-15}}</ref>