... 1.Support SIP2.0 (RFC3261), TCP/UDP/IP, RTP/RTCP/, HTTP, ICMP ARP/RARP, DNS, DHCP, NTP, PPPoE, STUN, and TFTP ... /6.3k), G.726 (40K/32K/24K/16K/), G.729A/B, and iLBC; 6.Support incoming call on show, restricting, and ... files by inside IVR equipment, Web browser, or TFTP and HTTP Center Server; 12.Support upgrading encrypts configuration files by TFTP or ...