The Ubiquiti UISP UFiber GPON OLT SFP Module B+ is a Class B+ GPON Optical Line Terminal (OLT) transceiver designed for use in UFiber OLT devices. It supports single-mode fiber connections with an SC/UPC connector and operates at asymmetric speeds of 2.5 Gbps downstream and 1.25 Gbps upstream over a distance of up to 20 km.   

Supported Media: Single-
RX Wavelength: 1310 nm
TX Power Range: 1.5 to 5 dBm
RX Power Range: -28 to -8 dBm
Downstream Data Rate: 2.5 Gbps
Upstream Data Rate: 1.25 Gbps
Cable Distance: 20 km