... 1. Support SIP2.0 (RFC3261), TCP/UDP/IP, RTP/RTCP/, HTTP, ICMP ARP/RARP, DNS, DHCP, NTP, PPPoE, STUN, and TFTP ... files by inside IVR equipment, Web browser, or TFTP and HTTP Center Server; 12. Support upgrading encrypts configuration files by TFTP or ... HTTP; 13. Microminiaturize and legerity design (size as a wallet), a ...