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3-PPT Port with GSM Module Cross-Network Gateway RoIP302 is developed based on the RoIP technology to bridge voice communications across multiple networks. It can connect up to 3 radio stations operated at different frequency bands simultaneously. These 3 radio stations can be configured in a single or multiple groups to communicate with another group which is defined in another RoIP device. This enables a very flexible configuration among various radio stations in order to form a single or multiple RoIP networks. With the built-in GSM and VoIP interfaces, RoIP-302 can also bridge voice communications among these networks.

Assume there are several Radio groups in two different cities. Since the coverage of radio is limited, they are not able to communicate directly. RoIP302’s P2P scenario could implement the communication without distance limitations.

RoIP 302

Key Features

Radio communication across multiple networks without distance limit

Interconvert between Radio group and IP networks

Interconnect Radio and GSM network

Support P2P connection without server 

Support private DDNS service

Media NAT traversal

Support remote control management

Software Features

VoIP Protocols:  SIP V2

Supply dynamic DNS service

Line Echo Cancellation

NAT Transversal and Router functions

Support IP voice stream to via a recording server

Highly stable embedded Linux operating system

Enhanced Features

Voice Code: g711(alaw/ulaw), g729, g723.1

Auto adapt jitter buffer


Voice activity detection (VAD)

On line firmware upgrade

Multi-language: English and Chinese

Hardware Features

PTT Port: 3

Power Adapter: DC 12V/2A

CPU: ARM11/700MHz

RAM: 128M

Flash: 8M

GSM Frequency: 850/900/1800/1900MHz

Max power consumption: 12W

Net Weight: 0.36kg

Size: 25cm*4cm*2.5cm

Color: Gray

Operating Temperature: 0-45℃

Working Humidity: 40%-90% non-condensation

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