This document provides specifications for the DWDM-SFP10G-40-C24-T02 10G 1558.17nm 40km DWDM SFP+ transceiver. It includes details on its product description, features, functional diagram, optical and electrical characteristics, pin definitions, digital diagnostic monitoring interface, package dimensions and ordering information. The transceiver is designed for 10GbE links up to 40km over single-mode fiber and supports DWDM with a 100GHz channel spacing. It provides digital diagnostics for monitoring parameters like temperature, voltage, transmit power and receive power.