4 ports gsm voip gaterway SUpport NAT

Specifications

Brand: Etross or OEM
Model: GOIP-400
Frequency: GSM 850/900/1800/1900MHZ

description:

The GoIP400 GSM Gateway bridges the GSM and the IP networks by enabling voice communications. It is ideal for VoIP to Local termination where a fixed telephone line (PSTN) is not available or for cellphone roaming via a VoIP network. Significant savings on long distance charges can be realized.

Key Features:

Open Standard VoIP Protocols (ITU H.323 V4 and IETF SIP V2)

Single or Multiple Server Registrations

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

Supported Standards

ITU: H.323 V4, H.225, H.235, H.245, H.450

RFC 1889 - RTP/RTCP

RFC 2327  - SDP

RFC 2833  - RTP Payload for DTMF Digits, Telephony Tones and Telephony Signals

RFC 2976  - SIP INFO Method

RFC 3261  - SIP

RFC 3264  - Offer/Answer model with SDP

RFC 3515  - SIP REFER Method

RFC 3842  - A Message Summary and Message Waiting Indicator

RFC 3489  - Simple Traversal of User Datagram Protocol (UDP) Through Network Address Translators (NATs)

DTMF: RFC 2833, In-band DTMF, SIP INFO

Physical and Environmental

Operating temperature: 10ºC to 40ºC (50ºF to 104ºF)

Storage temperature: 0ºC to 50ºC (32ºF to 122ºF)

Power: 12 Vdc 500 mA  (AC/DC adapter included)

Warranty: one year

Standard Component:

Packing: