Detailed Product Description

Network protocol
1. SIP v1 (RFC2543), v2 (RFC3261)
2. IP/TCP/UDP/RTP/RTCP
3. IP/ICMP/ARP/RARP/SNTP
4. TFTP client/DHCP client/ PPPoE Client
5. Telnet/HTTP server
6. DNS client
7. NAT/DHCP server

CODEC
1. G.711: 64k bit/s (PCM)
2. G.723.1: 6.3k / 5.3k bit/s
3. G.726: 16k / 24k / 32k / 40k bit/s (ADPCM)
4. G.729A: 8k bit/s (CS-ACELP)
5. G.729B: adds VAD and CNG to G.729

Voice quality
1. VAD: voice activity detection
2. CNG: comfortable noise generator
3. LEC: line echo canceller
4. Packet loss compensation
5. Adaptive jitter buffer

Call function
1. Call hold
2. Call waiting
3. Call forward
4. Caller ID
3-way conference

DTMF function
1. In-band DTMF
2. Out-of band DTMF
3. SIP info

SIP server
1. Registrar server (three SIP account)
2. Outbound proxy

Tone
1. Ring tone
2. Ring back tone
3. Dial tone
4. Busy tone
5. Programming tone

Phone function
1. Volume adjustment
2. Speed dial key
3. Phone book
4. Flash

IP assignment
1. Static IP
2. DHCP
3. PPPoE

Security
1. HTTP 1.1 basic/digest authentication for web setup
2. MD5 for SIP authentication (RFC2069/ RFC 2617)

QoS
1. ToS field

NAT traversal
1. Stun

Configuration
1. Web browser
2. Console/telnet
3. IVR/keypad

Firmware upgrade
1. TFTP
2. Console
3. HTTP