The SFP-10G-RA-1G-LX and SFP-10G-RA-1G-SX transceivers are rate adapting SFP+ transceivers with internal clause 37 auto-negotiation (AN) support.   The transceiver host interface is 10G XFI and the module rate adapts in the egress direction from 10G to 1G before transmitting data on the attached fiber.  In the ingress direction it rate adapts the received 1G data to 10G before sending to the host switch. 

This feature introduces support for the SFP-10G-MRA-T SFP transceiver. This is a rate adapting transceiver, meaning it can convert the system side interface to a lower rate on the line side.

This feature adds support for 10Gb, 25Gb, and 50Gb speeds on additional ports of the 7280QRA C36S and 7280QR C72:

Forward Error Correction (FEC) is required with some QSFP100 media to achieve error free operation of the link when