Gigaopto provides PON access networks with a series of SFP - packing PON OLT optical transceiver modules that support GPON data rates at 2.488Gbps downstream and 1.244Gbps upstream with link length of 20km at Single-Mode Fiber (SMF). They are compliant with the ITU-T G.984.2 and applicable portions of SFF-8431.The optical transceiver is RoHS compliant.