4 FXS ports VOIP Gateway .
Support dual protocols: ITU-H.323 V4 and IETF SIP V2 .
Provide 4 RJ-11 ports for a POTS phone or a PBX's trunk line .
Provide 2 RJ-45 Ethernet Ports .
Support call forward/transfer/hold, phone book .
Support G.711 A/μ law, G.729A/B, G.723.1 Codecs.
Support QoS, NAT transversal and router function .
Support VAD, CNG, EC
Built-in H.323 V4 and SIP V2 Protocols
Hight performance router
Auto provisioning and firmware updates
Open Standard VoIP Protocols (ITU H. 323 V4 and IETF SIP V2)
Two 10/100 Ethernet for WAN / LAN connections
Peer-to-Peer IP Calls
Speech quality ensured by QoS at the Ethernet and IP layers and comprehensive jitter buffer
Line Echo Cancellation
VLAN and QoS support
NAT Transversal and Router functions
Voice prompts, HTTP Web, Auto Provision support for configuration and updates
Highly stable embedded Linux operating system in high performance ARM 9 Processor
4 RJ-11 FXS ports for traditional phone set or PBX's trunk line
LEDs for Power, Ready, Status, WAN, PC, FXS
Call Forward, Call Hold, Call Transfer Dial Plan
Dynamic selection of codec
Advanced jitter buffer
Automatic traversal of NAT and firewall
VLAN / Qos
Echo cancellation for Speakerphone
Comfort noise generation (CNG)
Voice activity detection (VAD)
Auto provisioning (requires auto provisioning server)
On line firmware upgrade
Multi-language support: English and Chinese