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%