Basic Features

LEDs for Power, Ready, Status, WAN, PC, FXS

Dial in mode or dial out mode only

Call forward from GSM to VoIP and VoIP to GSM

Dial Plan   gateway gsm

Retransmit GSM Caller ID to VoIP terminal

   voice over ip telephone

Enhanced Features

Dynamic selection of codec

Advanced jitter buffer

Automatic traversal of NAT and firewall

VLAN / Qos

Router   gateway gsm

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

   voice over ip telephone

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

Operating temperature: *0°C to *0°C (*0°F to **4°F)