... 1. Support SIP2.0 (RFC3261), TCP/UDP/IP, RTP/RTCP/, HTTP, ICMP ARP/RARP, DNS, DHCP, NTP, PPPoE, STUN, and TFTP ... , gateway, and DMZ Port transmit; 3. Support the PETN making or receiving calls (by the FXO Port); 4. Use the DSP ... Server; 12. Support upgrading encrypts configuration files by TFTP or HTTP; 13. Microminiaturize and legerity design (size as a wallet), a ...