?Two 10/100 Ethernet circuits connect to the LAN and an additional device ?GSM module for making GSM calls ?Speech quality ensured by QoS at the Ethernet and IP layers and comprehensive jitter buffer ?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 Basic Features ?LEDs for Power, Ready, Status, WAN, PC, GSM ?Call forward from GSM to VoIP and VoIP to GSM ?Dial in mode or dial out mode only ?Dial Plan ?Password protection for both GSM dial in or dial out ?Retransmit GSM Caller ID to VoIP terminal Enhanced Features ?Dynamic selection of codec ?Advanced jitter buffer ?Automatic traversal of NAT and firewall ?VLAN / Qos ?Router ?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
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