Hi,
I needed the same solution, and tested the cable in a Cisco 3750X 10 Gbit interface, when inserting the cable the logging displays "not supported"
Nov 14 22:22:36.534 UTC: %GBIC_SECURITY_CRYPT-4-VN_DATA_CRC_ERROR: GBIC in port Te2/1/1 has bad crc (.....)
Nov 14 22:22:36.534 UTC: %PHY-4-SFP_PLUS_NOT_SUPPORTED: The SFP PLUS in Te2/1/1 is not supported (.....)
Regards, Edward