The EPON ONU SFP transceiver provides up to 1.25G-TX/1.25G-RX up to 20km over single-mode fiber (SMF) using a wavelength of 1310nmTx/1490nmRx via an SC connector. It can operate at temperatures between -40°C and 85°C. Digital optical monitoring (DOM) support is also present to allow access to real-time operating parameters. It is fully compliant with IEEE802.3ah PX20+ 20km application and RoHS standards and is ideal for EPON system and FTTx applications.