Cost effective Asterisk based IP PBX for medium-to-large enterprise, 5 years plus Asterisk ... meanwhile saving cost.FEATURE HIGHLIGHTSSupport for traditional voice and multimedia communications Embedded applications including voice messaging, auto-attendant, and ... 1q, 802.2, 802.3af, 802.11, IP, IP-ToS, DiffServ, TCP/IP, UDP/IP, DHCP, DNS, PPPOEFeatures Follow meYESVoice conferenceYESAutomatic Call ...