GEPON OLT Transceiver FETx-493133x-ExCD is a high performance module with SFP package supports data rate of typical 1.25 Gbps for GEPON OLT application up to 20km transmission distance, it's designed for meeting with IEEE Std 802.3ah? -2004 1000BASE-PX20. SC rececptacle. www.sopofiber.com