l With 4 PON ports or 8PON ports. l Support 256/512 ONUs (1:64 splitting retio, 10km transmission distance). l Provide 8GE uplink ports and and 8 SFP Combo ports. l L2 full-line-speed ability l MAC address table: 16K l VLAN support: 4096 l ONU auto find and auto register. l Support dynamic bandwidth distribution. l Support online upgrade and batch upgrade l Support in-band and out-of-band management interface l Support CLI, TELNET,EMS management mode. l Support dual-redundancy