1 .Full compatible with ITU-T G.984. 2.Support port-based rate limitation and bandwidth control 3.Integrated OMCI remote configuration and maintenance function. 4.Support data enscryption, group broadcasting, port Vlan separation ,RSTP,etc. 5.Support Dynamic Bandwidth Allocation (DBA) 6.Support ONT auto-discovery/Link detection/remote upgrade of software; 7.Support VLAN division and user separation to avoid broadcast storm; 8.Support power-off alarm function ,easy for link problem detection 9.Support broadcasting storm resistance function 10.Support port isolation between different ports 11.Support ACL and SNMP to configure data packet filter flexibly 12.Specialized design for system breakdown prevention to maintain stable system 13.Support software online upgrading 14.EMS network management based on SNMP ,convenient for maintenance