... Softswitch and SIP Servers High performance-price-ratio VoIP applications Features and Benefits: Multiple models optional VJtech VoIP access ... It also supports rich features of NAT, DHCP Server/Client, DNS, PPPoE client and so on. Patented Smart Life Line technology ... NTP, TFTP, HTTP, TELNET, ICMP, STUN, NAT, DHCP client/server, PPPoE client, DNS, DNS SRV Voice Transport RTP/RTCP, Real-Time Transfer ...