Voice
Call Control Protocol : SIP v1 (RFC 2543), v2 (RFC 3261)

• Interface : FXO port

Voice Codec : G.711 (64k bit/s, PCM), *G.723.1 (6.3k / 5.3k bit/s), *G.726 (16k / 24k / 32k / 40k bit/s, ADPCM), *G.729A (8k bit/s, CS-ACELP), *G.729B (adds VAD & CNG to G.729)
Echo Cancellation : Packet Loss Compensation, Adaptive Jitter Buffer, VAD (Voice activity detection), CNG (Comfortable noise generator), AEC (Acoustic echo canceller), G.165 (LEC, Line echo canceller), G.168 (EC, Digital network echo canceller)
DTMF Function : In-Band DTMF, Out-of Band DTMF, SIP Info
QoS : ToS support

Networking
Interface : 10/100Mbps Fast Ethernet
Protocols: Static IP / DHCP Client / PPPoE Client / TFTP Client / HTTP Server / DNS Client / Telnet / SNTP / RTP / RTCP / DDNS
Software Upgrade : HTTP / *TFTP / *Telnet
Security: HTTP 1.1 Basic / Digest authentication for Web setup / MD5 for SIP authentication (RFC2069 / RFC2617)

• NAT Traversal : STUN / uPnP / R-Port
• Build-in Router : DHCP Server / DMZ / NAT

Call Features

• Call Function : Call Hold / Call Waiting / Call Forward / Call Transfer / Caller ID / Call Block / 3-way Conference / Call History

Phone Function : Volume adjustment / Speed dial / Phone book / Speaker Phone / Mute / Redial

Management
User Interface : Web Browser / Keypad Configuration / *Telnet / *Console
LED Indication : Power / Register / Network connection

General Information
Power : *100 – 240VAC, 50 – 60Hz, 12VDC
Power Consumption : 6W
Connector : RJ-45 * 2, RJ-11 * 1
Dimension :
Weight:
Certification : CE / FCC

• Voice Interface, Voice Codec, Software Upgrade, NAT Traversal, Build-in Router, Management User Interface, and Power adapter are optional.
• The capability of most call features are operating by VoIP service provider.