Features: 1) NAT support: NAT (network address transition) 2) QS support: quality of service 3) Device management: web-based - Internet Explorer v6 or later; Netscape 4) Navigator v6 or later; or other Java - enabled browsers. 5) DHCP server and client 6) Call control protocol compliance SIP 7) Voice compression G.711 (A-law and U-law), G.723, G.729a, G.726 8) Analog voice ports type: loop-start FXS interfaces 9) DTMF tone detection/generation 10) V.21/V.25 Modem/FAX tone detection 11) Echo cancellation: G.165/G.168 12) Ethernet ports WAN: 10/100Base-T Ethernet port 13) LAN: NWay 10/100Base-TX Fast Ethernet Ports (MDI-X) 14) IEEE 802.3 10/BASE-T Ethernet compliance 15) IEEE 802.3u 100Base-TX Fast Ethernet compliance 16) Quality of service: voice service is prioritized over the data traffic 17) FAX support: T.38 18) Supports voice packet prioritization - Example: TOS Bit 19) Network protocols: TCP/IP, UDP, ARP, ICMP, TFTP, Telnet, HTTP 20) DHCP: dynamic host configuration protocol client 21) NAT: network address translation 22) PPP over Ethernet Client 23) Manage functions through an intuitive web-based 24) Graphical user interface 25) TFTP: the built-in trivial file transfer protocol provides 26) Firmware upgrade 27) DTMF: Inbound/outbound/RFC2833/inbound and outbound 28) Security: password authentication protocol/challenge handshake 29) Authentication protocol (PAP/CHAP) 30) Administration password through Web and SNMP 31) Packet filter by IP address, port number and protocol