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 CNG)
• Voice activity detection (VAD)
• Auto provisioning (requires auto provisioning server)
• On line firmware upgrade
• Multi-language support: English and Chinese 

Hardware Specifications

• Processor: ARM9E **3MHz
• DSP: VPDSP**1 **6MHz
• Memory: RAM *6MB/ Flash 4MB
• GSM Module: Type: **0MHz, **0MHz, ***0MHz, ***0MHz
• Power: Input AC**0V ~ **0V, output DC*2V/2A ***0%
• Power consumption: *2W maximum
• Network card: **0/*0Base-T x2
• LED: Operation and lines light
• GSM Passway:eight
• Operating temperature: *0°C to *0°C (*2°F to **4°F)
• Storage temperature: 0°C to *0°C (*2°F to **2°F)
• Working Humidity: *0% ~ *0% Not congealed
• Weight: ***3 g (1 lb) (Including AC/DC Adapter)
• Warranty: one year

Supported Standards

• ITU: H.**3 V4, H.**5, H.**5, H.**5, H.**0
• RFC ***9 - RTP/RTCP
• RFC ***7 SDP
• RFC ***3 RTP Payload for DTMF Digits, Telephony Tones and Telephony Signals
• RFC ***6 SIP INFO Method
• RFC ***1 SIP
• RFC ***4 Offer/Answer model with SDP
• RFC ***5 SIP REFER Method
• RFC ***2 A Message Summary and Message Waiting Indicator
• RFC ***9 Simple Traversal of User Datagram Protocol (UDP) Through Network Address Translators (NATs)
• RFC ***1 SIP Replaces Header
• RFC ***2 SIP Referred-By Mechanism
• draft-ietf-sipping-cc-transfer**4 Session Initiation Protocol Call Control - Transfer
• Codec: G.**1 (A/µ law), G.**9A/B, G.**3.1
• DTMF: RFC ***3, In-band DTMF, SIP INFO