Voice

• Call Control Protocol H.323 V4 or MGCP or SIP(option)
• Voice Compression G.711 A/μ -Law, G.723.1, G.729A/B/AB
• Support Silence Suppression, VAD, CNG, Acoustic Echo Cancellation, 　
• Jitter Buffering
• Echo Cancellation G.165 16ms
• Delayed (End to End) 100ms
• Flow of the average 10-12k bit/s
• DTMF tone detection
• E.164 Dial plan

LAN Interfaces

• Interface: Dual 10 Base-T Ethernet
• Connector Type: RJ-45 connector

Networking Protocol

• PPPoE
• DHCP client/Static IP
• UDP/TCP
• RTP/RTCP
• FTP/HTTP/DNS

Dialing Methods

• On-hook dialing
• Redial key dialing the last dialed numbers
• Extension number dialing through gatekeeper/SIP proxy server
• Direct IP address dialing to IP phone or gatekeeper/ SIP proxy server

Management Functions

• Web browser based management provided
• Phone set configuration
• Display& 32 characters LCD display(2 lines with 16 characters each)

Environmental

• Operation Temperature 0 - 40(32° - 104°F)
  
• Storage Temperature -30 - 65 (-22° - 149°F)
  
• Relative Humidity 10 – 95% Non-Condensing
  

• Input AC Range& 100 – 240VAC, 50 – 60Hz
  
• Input DC Range 5VDC, 1A
  
• Power Consumption 3W
  

• Data Memory 16MB
  
• Procedure Memory 8MB Flash memory
  
• NAT Pass-through(SIP with STUN)
  
• Call Hold, Call Mute, Call Status, Caller ID
  
• Headset Connector, Speaker Phone, Networking Status
  
• Phone Book, Volume Adjustment, Firmware Upgrade
  
• No-Answer Call Forward, Busy Call Forward, Always Call Forward
  
• Miss-Call, Dialed-Call, Answered-Call, Last Number Redial, Speedy Dial
  
• Voice Response, Web configuration, LCD Display, LED indicators...etc.
  
• Feature Keys Called, Answered, Miss-Call, Phone, Network-Setting (IP/Subnet Mask/Gateway/Server IP)
  
• Speedy-Dial, Call-Hold, Redial, Mute, Volume Up/Down, Hands free