https://www.cdatatec.com/products/fd1304e-4-port-epon-olt.html FD1304E 4+4 PON PORTS EPON OLT 4PON EPON OLT FD1304E-B1 completely meet relative standard of IEEE 802.3x and FSAN, which is 1U rack-mounted device 4 uplink GE ports, 4*10GE uplink ports, 4 fixed EPON ports and 4 optional EPON ports. Each uplink EPON port supports the splitting ratio of 1:64, the EPON system supports up to 512 terminal connections.All Rights Reserved