Main Chipset Support Three sip servers running at the same time. Redundancy sip server capable. NAT, Firewall. Auto Call Routing Selection VOIP and PSTN(choice) DHCP client and server. Support PPPoE, (used for ADSL, cable modem connecting). Support major G7.xxx CODEC. G.165 compliant 16ms echo cancellation E.164 dial plan and customized dial rules Hotline. Call Forward, Call Transfer, 3-way conference calls Call ID display DND(Do Not Disturb),Black List,Limit List Functions Static/Dynamic WAN-IP-Addressing PPPoE Web, telnet and keypad management. Adjustable user password and super password Upgrade firmware through HTTP, FTP or TFTP. Telnet remote management. Upload/download setting file Auto-provision. Safe mode provide reliability Phone book, maximum 100 entries. Spec Two RJ45 ports, one for WAN, one LAN. Power port one Rj11 FX0 Port(choice)