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3 Radio Channels Gateway

3-PPT Port with GSM Module Cross-Network Gateway RoIP302M 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.
  • RoIP302

  • DBL


  • Radio communication across multiple networks without distance limit

  • InterConverting 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

  • 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: 25*4*2.5(cm)

  • Color: Gray

  • Operating Temperature: 0-45℃

  • Working Humidity: 40%-90% non-condensation

  • 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

  • Router

  • Voice activity detection (VAD)

  • On line firmware upgrade

  • Multi-language: English and Chinese

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.