3. Software Feature Protocol: IETF SIP RFC3261 Codec: G.711μ-law, G711 a-law, 729a Security: HTTP 1.1 basic/digest authentication for Web setup MD5 for SIP authentication (RFC 2069/ RFC 2617) Dial Methods: Direct IP call without SIP proxy Dial number via SIP server Voice Quality: VAD, CNG, G.168, Jitter buffer QoS: ToS field Dial Signal: DTMF dialing Tone: DTMF, Ring Tone, Ring Back Tone, Dial Tone, Busy Tone IP Assignment: Static IP, DHCP NAT Traversal: STUN TCP/IP: IP/TCP/UDP/DHCP/RTP/ HTTP//TFTP/DNS Configuration: Web browser, Auto-provisioning system Firmware Upgrade: TFTP 4. Hardware Feature Network Interface: RJ-45 x 1, 10/100BaseT Phone Interface: RJ-11 x 1, connect to analog phone Power: Input AC 100-120V / 220-240V, Output DC 5V Size: 95(L) x 60(W) x 20(H) mm Weight: 70g Operation temperature: 0C to 40C (32 to 104F) Storage temperature: -30C to 65C (-22 to 149F) Humidity: 10 to 90% no dew