These cables are available QSFP to XFP Cable be customized

The nitty gritty details between an QSFP to XFP Cable optics module and an SFP+ optics module are fairly straight forward.  For XFP, on the transmit side of things, the optics module standard provided additional signal conditioning before it put the signal onto the fiber.  For SFP, there is no additional signal conditioning provided in the module specification.  Essentially, with the interface to SFP modules (called the SFI interface), the signaling requirements are very much more strict then the signaling required from XFI interfaces to the QSFP to XFP Cable modules.Common direct attach cables include SFP cables, SFP+ cables, QSFP to XFP Cable, QSFP+ cables, MIni SAS cables, CX4 cables. These direct attach cables can meet the ever growing need to cost-effectively deliver more bandwidth, and they can be customized in different length to meet your requirement