The OPTICAL MODEM ONT GPON 640-10B is a compact version of GPON device for broadband internet access. It is a Optical Network Terminal (ONT) model, which has a SC-APC optical interface and operates according to the GPON standard (ITU-T G.984)/(ITU-T G.988), with a speed of up to 2.5 Gbps downstream and 1.25 Gbps upstream., limited to 1 Gpbs ethernet port.