ATOP 10G TSFP+ DWDM ER is a tunable transceiver module designed for 40km optical communication applications, and it is compliant to SFP+ MSA standard. This module can convert a 10Gb/s electrical data to 10Gb/s optical signals. Similarly, it a 10Gb/s optical input signal to 10Gb/s serial electrical data. It has been designed to meet the harshest external operating conditions including temperature, humidity and EMI interference. The module offers very high functionality and feature integration, accessible via a two-wire serial interface.