XDK-E8065U(4FE+2POTS+1wifi) is an EPON user terminal,which meets the SOHO broadband access ,FTTH broadband speed ,FFTH/FTTD of cable-television operator.The equipment based on mature, stable, cost-effective Gigabit EPON technology combines Gigabit Ethernet switching technology, CATV, WDM, and high-quality VoIP technology. It has high reliability, ease of administration and good QOS. The technology performance meets the IEEE802.3ah, China Telecom EPON equipment technical requirements (V2.1) specification requirements. 1, Special Features 1.1, Data service function Full speed without blocking exchange 8K MAC address table Support Full Range VLAN ID Support QinQ VLAN, 1:1VLAN, VLAN Trunk etc. support port monitor, port mirror ,port speed limit ,port SLA etc. QoS based on interface,IEEE 802.1p,IPV4(ToS),Diff-Serv,IPV6,802.1Q VLANID,destination MAC or source MAC. The Ethernet interfaces according to the specifications of the IEEE802.3. 128-bit AES encryption algorithm. According to 802.1x remote management and user authentication 1.2, Telephone service function Support SIP protocol, H.248 protocol, H.323 optional. Support ITU-T G.711, G.723.1, G.729 compression algorithm Echo cancellation meets ITU-T G.168-2002. echo cancellation for the longest is 128ms. Support OSPF,T38. Support RFC2833 and RFC2833 redundant,distinctive ringing ,MD5 certificate,call forwarding,call waiting,telephone hotline,alarm clock,abbreviated dialing and etc. Support two POTS interface three-way calling,three-way calling support local mixing. Support POTS GR909 line test function. Support dynamic PPPoE,dhcp and static IP. Support CTC2.1 standard 7×24h call lose≤0.01%