Features:
• Vxworks OS
• Support SIP2.0 (RFC3261) and correlative RFCs
• SIP support 2 SIP servers, and backup SIP proxy servers
• Supports SIP UDP / TCP/ TLS
• SIP support SIP domain, SIP authentication (none, basic, MD5) , DNS name of server, Peer to Peer / IP Call

Key Features 
• 6 Soft keys programmable
• Multi languages displayed(web)

Audio Features
• HD voice: HD handset
• Codec: G.711A/u, G.7231 high/low, G.729AB, G.722, G.726-32
• DTMF: In-band, RFC 2833 and SIP INFO
• Full duplex hands- free speaker phone with acoustic
echo cancellation
• Voice Activity Detection (VAD)
• Comfort Noise Generation (CNG)
• Background noise suppression
• Adaptive jitter buffers
• Packet loss concealment
• SRTP
• mute

Advanced Features
• Call transfer ( unattended/ attended/ semi-attended )
• Call holding
• Call waiting
• 3 way call conference
• Capable of 2 way conversation
• Join call
• Call pickup
• Call park
• Redial
• Call back
• Call completion
• Hot desking
• Auto redial
• Predial
• SIP messaging , MWI
• Flexible dial plan
• Barring function for outgoing calls
• Do not disturb
• Auto answer
• CLIR(rejects anonymous calls)
• CLIP(to make an anonymous call)
• Dial without registration
• Call logs with missed calls/ incoming calls/
outgoing calls. Each support 300 records(Web)
• Phonebook 500 records(Web)
• Speed Dial (abbreviated dialing)
• Hotline/Warm-line
• Black List/ White List
• Intercom/Intercom barge
• Password dial, DTMF hidden
• Action URL/ active URI
• Voice codec setting for each SIP line
• Multicast
• LDAP, XML phonebook
• Web dial
• Keypad lock, Emergency call

Network/ Security Features
• WAN / LAN:10/100M Ethernet ports
• Bridge mode and route
• PPPoE for xDSL
• 802.3af POE
• VLAN(Voice VLAN/Data VLAN)
• 802.1X
• NAT (NAPT)
• NAT transverse :Support STUN client
• DHCP client on WAN/ DHCP server on LAN
• Main DNS and secondary DNS server
• DNS Relay
• SNTP Client
• Firewall and DMZ
• VPN(L2TP/Open VPN)
• ping, tracert, telnet

Physical features
• Screen: 3.5inch(480×320) color screen
• Adapter Input: AC 100-240V
• Adapter Output: DC 5V/1A
• WAN Port -10/100 BASE-T RJ-45 for LAN
• LAN Port-10/100 BASE-T RJ-45 for PC
• Power consumption: IDLE: 2.5W Active: 2.8W
• Operation Temperature: 0〜40°
• Relative Humidity: 10〜65％
• Main Chipset : Broadcom
• SDRAM: 16MB
• FLASH: 8MB
• Dimension:235x170x130mm