Fast Photonics 25G CWDM SFP+ transceiver modules are designed for 25 Gigabit wireless front-haul links up to 10km over single mode fiber.This module is operating at a nominal wavelength of CWDM wavelength. There are four center wavelengths available from 1271nm to 1371nm, with each step 20nm. They are compliant with the SFF-8472,SFF-8402,SFF-8432 and IEEE802.3cc protocol.