The tunable OTN SFP+ DWDM 11.1 Gbps transceiver combines carrier grade OTN G.709 framing, FEC performance and 50GHz full C-band tunability into a SFP+ MSA-compliant package. This tunable OTN SFP+ is the only industry SFP+ MSA that can transparently carry a native 10G LAN PHY payload with a carrier grade DWDM Optical Transport Network (OTN) interface without the need for bandwidth limitation. OTN SFP+ combines a G.709 compliant digital wrapper and forward error correction (FEC) with an M-Z modulated 50GHz tunable laser for superior optical performance and management functions equal to those found in external DWDM transponder systems. Tunable OTN SFP+ is designed to interoperate with any open DWDM line system that support 50GHz or 100GHz spaced wavelengths per the ITU-T C-band grid thus offering complete and cost effective DWDM transport for IP, MPLS, and Ethernet applications.