GrenTech 10G SFP+ DWDM uses a C-band fixed wavelength (100GHz or 50GHz) cooled EML laser, with a PIN (40km) or APD (80km) receiver. It supports 10GE and OTN OTU2e standards and is compatible with SONET/SDH and 10G Fiber Channel. Contact GrenTech for more 10g dwdm sfp+ transceivers.