We have done that with a CVR and 1g sfp.

On 1/31/2022 11:05 AM, Bill Woodcock wrote:
Hey, does anyone know of an SFP28 capable of rate-adapting down from 25G on the 
cage side down to 1G on the line side?  Can be copper or fiber on the line 
side, I don’t care, my interest is in the chip inside.

Thanks,

                                 -Bill

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