Firewall. Auto Call Routing Selection VOIP and PSTNï¼ÂÂoptional) DHCP client and server. Support PoEï¼ÂÂoptional) 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 CPUï¼ÂÂ32Bit 125Mhz Flash:16m Ram:16m FCC/CE