FEATURES : 1U19 inchstandard box EPON OLT with 4 PON ports Compliant with IEEE802.3ah YD/T1475-2006EPON and China Telecom EPON Technical Requirements QoS based on port, VID, TOS and MACaddress(32K Mac address) Support priority queue scheduling, support SP, WRR or SP + WRR scheduling algorithm Support 4096 VLAN, transparent transmission and conversion, support VLAN stacking (QinQ) Support 32K MACs line speed learning and aging, support MAC address restriction Support IEEE 802.1d (STP), 802.1w (RSTP) and MSTP Spanning Tree Protocol Support multicast Groups, IGMP v1/v2 snooping and IGMP Proxy Support port-based rate limitation and bandwidth control Support PON line AES and triplechuringencryption Support Dynamic Bandwidth Allocation (DBA) Support ONU auto-MAC binding and filtering, support the ONU offline business configuration and automatically configure, manual/auto authentication Support the use of the ACL rules for packet filtering Support SNMP, telnet, CLI, OAM and Web management